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Best AI Agents for Software Development Ranked: A Benchmark-Driven Look at the Current Field

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The AI coding agent market seems to be virtually unrecognizable in comparison with 2024 and even early 2025. What began as inline autocomplete has advanced into absolutely autonomous methods that learn GitHub points, navigate multi-file codebases, write fixes, execute assessments, and open pull requests — and not using a human typing a single line of code. By early 2026, roughly 85% of builders reported repeatedly utilizing some type of AI help for coding. The class has fractured into distinct archetypes: terminal brokers, AI-native IDEs, cloud-hosted autonomous engineers, and open-source frameworks that allow you to swap in no matter mannequin you favor.

The drawback is that each software claims to be the finest, and the benchmarks used to justify these claims aren’t at all times measuring the similar issues — and in some instances are now not credible measures at all. This article options the most vital AI coding brokers by the metrics that really matter for manufacturing software program improvement, whereas being sincere about the place these metrics have damaged down. If you’re an AI/ML engineer, software program developer, or information scientist attempting to resolve the place to speculate your tooling price range in 2026, begin right here.

How to Read These Benchmarks — Including Why the Most-Cited One Is Now Disputed

Before the itemizing, an vital calibration on the numbers — as a result of one main benchmark shift occurred mid-cycle and isn’t but mirrored in most software comparability articles.

SWE-bench Verified has been the {industry}’s customary coding benchmark since mid-2024. It presents brokers with 500 actual GitHub points drawn from fashionable Python repositories and measures whether or not the agent can perceive the drawback, navigate the codebase, generate a repair, and confirm that it passes assessments — end-to-end, with out human steerage. It was a reputable proxy. In February 2026, that modified.

On February 23, 2026, OpenAI’s Frontier Evals staff published a detailed post explaining why it had stopped reporting SWE-bench Verified scores. Their auditors reviewed 138 of the hardest issues throughout 64 unbiased runs and located that 59.4% had essentially flawed or unsolvable take a look at instances — assessments that demanded precise operate names not talked about in the drawback assertion, or checked unrelated habits pulled from upstream pull requests. More critically, they discovered proof that each main frontier mannequin — GPT-5.2, Claude Opus 4.5, and Gemini 3 Flash — might reproduce the gold-patch options verbatim from reminiscence utilizing solely the activity ID, confirming systematic coaching information contamination. OpenAI’s conclusion: “Improvements on SWE-bench Verified now not mirror significant enhancements in fashions’ real-world software program improvement skills.” OpenAI now recommends SWE-bench Pro as the substitute for frontier coding analysis.

This doesn’t make SWE-bench Verified scores ineffective. Other main labs proceed to report them, third-party evaluators proceed to run them, they usually stay helpful for broad directional comparability. But any rating that presents SWE-bench Verified scores as clear, goal measurements of real-world potential — with out this caveat — is supplying you with an incomplete image. All scores on this article are flagged accordingly.

SWE-bench Pro is more durable to interpret than Verified as a result of printed outcomes fluctuate considerably by cut up, scaffold, harness, and reporting supply. The benchmark incorporates 1,865 whole duties divided right into a 731-task public set, an 858-task held-out set, and a 276-task industrial/non-public set drawn from 18 proprietary startup codebases. When the original Scale AI paper measured frontier fashions utilizing a unified SWE-Agent scaffold, prime scores have been under 25% — GPT-5 at 23.3% — reflecting a genuinely more durable analysis. However, present public leaderboard and vendor-reported runs now present considerably greater scores beneath newer fashions and optimized agent harnesses: OpenAI stories GPT-5.5 at 58.6% on SWE-bench Pro (Public), whereas Anthropic’s comparability desk lists Claude Opus 4.7 at 64.3% and Gemini 3.1 Pro at 54.2%. These numbers shouldn’t be straight in contrast with the authentic sub-25% SWE-Agent outcomes with out noting the scaffold and cut up variations — the benchmark has not modified, however the analysis situations and mannequin generations have. When you see a 60%+ SWE-bench Pro rating alongside a sub-25% one, they’re measuring the similar benchmark beneath very completely different situations, not two separate assessments.

Terminal-Bench 2.0 evaluates terminal-native workflows: shell scripting, file system operations, setting setup, and DevOps automation. As of April 23, 2026, GPT-5.5 leads at 82.7% on this benchmark — confirmed in OpenAI’s official release. Claude Opus 4.7 scores 69.4% (Anthropic/AWS-reported), and Gemini 3.1 Pro scores 68.5%. An vital methodological caveat: completely different harnesses produce completely different numbers for the similar mannequin. Anthropic’s Opus 4.6 system card confirmed GPT-5.2-Codex scoring 57.5% on the unbiased Terminus-2 harness vs 64.7% on OpenAI’s personal Codex CLI harness — a 7-point hole from harness alone. When evaluating Terminal-Bench figures throughout sources, at all times test which execution setting was used.

One ultimate cross-benchmark caveat: agent scaffolding issues as a lot as the underlying mannequin. In a February 2026 analysis of 731 issues, three completely different agent frameworks operating the similar Opus 4.5 mannequin scored 17 points aside — a 2.3-point hole that adjustments relative rankings. A benchmark rating labeled with a mannequin identify displays the mannequin and the particular scaffold wrapped round it, not the mannequin in isolation.

10 AI Agents for Software Development

A Note on Claude Mythos Preview

The present chief on SWE-bench Verified amongst third-party trackers is Claude Mythos Preview at 93.9%, introduced April 7, 2026 beneath Anthropic’s Project Glasswing. It will not be usually accessible. Access is restricted to a restricted set of platform companions; Anthropic has said it doesn’t plan broad launch in the close to time period, partly as a result of elevated cybersecurity functionality considerations. It sits exterior the fundamental comparability under as a result of builders can’t entry it by customary channels. Its existence does, nonetheless, sign that the sensible functionality ceiling sits considerably above what any publicly accessible software at the moment delivers.

#1. Claude Code (Anthropic)

SWE-bench Verified (self-reported): 87.6% (Opus 4.7) / 80.8% (Opus 4.6) SWE-bench Pro (Anthropic inside variant): 64.3% (Opus 4.7, #1) / 53.4% (Opus 4.6) Terminal-Bench 2.0: 69.4% (Opus 4.7, Anthropic-reported) CursorBench: 70% (Opus 4.7, Cursor-reported) Claude Code subscription: $20–$200/month | Opus 4.7 API: $5/$25 per million tokens

Claude Code is Anthropic’s terminal-native coding agent and the chief on code high quality metrics throughout most self-reported and third-party evaluations as of May 2026. It runs from the command line, integrates with VS Code and JetBrains through extension, and is constructed round Claude Opus 4.7 — launched April 16, 2026.

Opus 4.7 represents a step-change over its predecessor. SWE-bench Verified jumped from 80.8% to 87.6% — an almost 7-point achieve. On Anthropic’s inside SWE-bench Pro variant, the mannequin moved from 53.4% to 64.3%, an 11-point achieve that places it forward of each present publicly accessible competitor on that more durable benchmark. On CursorBench, Cursor’s CEO reported Opus 4.7 at 70%, up from 58% for Opus 4.6. Rakuten reported 3× extra manufacturing duties resolved on their inside SWE-bench variant; CodeRabbit reported over 10% recall enchancment on complicated PR opinions with steady precision.

Opus 4.7 launched self-verification habits: the mannequin writes assessments, runs them, and fixes failures earlier than surfacing outcomes, fairly than ready for exterior suggestions. It additionally launched multi-agent coordination — the potential to orchestrate parallel AI workstreams fairly than processing duties sequentially — which issues for groups operating code assessment, documentation, and information processing concurrently. The 1 million token context window can help a lot bigger repository contexts than shorter-window instruments, although very giant monorepos nonetheless profit from indexing, retrieval, or file choice methods to remain inside sensible limits.

One vital pricing distinction: Claude Code subscription tiers ($20–$200/month) are what particular person builders pay to make use of Claude Code in the CLI and IDE integrations. The underlying Opus 4.7 API is priced at $5 per million enter tokens and $25 per million output tokens — unchanged from Opus 4.6 — with a batch API low cost of fifty% and immediate caching lowering prices additional. Teams constructing customized brokers on prime of the Anthropic API aren’t paying the subscription charge.

On Terminal-Bench 2.0, Opus 4.7 scores 69.4% — sturdy, however GPT-5.5 has since moved forward on this particular benchmark at 82.7%. For pure terminal/DevOps agentic workflows, that hole is price contemplating.

Best for: Developers engaged on complicated multi-file engineering duties, giant codebases, or long-horizon refactoring who prioritize output high quality over pace.

#2. OpenAI Codex (OpenAI)

Terminal-Bench 2.0 (GPT-5.5): 82.7% — present #1 SWE-bench Pro Public (OpenAI-reported, GPT-5.5): 58.6% SWE-bench Verified (third-party trackers, GPT-5.5): ~88.7% (OpenAI doesn’t self-report) Pricing: Codex CLI is open-source (mannequin utilization requires a ChatGPT plan or API key); GPT-5.5 in Codex accessible on Plus ($20/month), Pro ($200/month), Business, Enterprise, Edu, and Go plans; API: $5/$30 per million tokens (gpt-5.5)

An vital correction to many comparisons of Codex: the Codex CLI is a neighborhood software that runs in your machine, not a cloud-sandboxed system. The Codex CLI (accessible on GitHub as openai/codex) runs a neighborhood agent loop in your terminal, utilizing OpenAI’s API for mannequin inference. The cloud execution floor — the place duties run in an remoted VM with out touching your native setting — is the Codex net product and IDE integrations, not the CLI. This distinction issues for safety, community entry, and price modeling.

GPT-5.5 launched April 23, 2026 and is OpenAI’s most succesful coding mannequin up to now. On Terminal-Bench 2.0, it scores 82.7% — the present #1 place throughout all publicly accessible fashions, forward of Claude Opus 4.7 (69.4%) and Gemini 3.1 Pro (68.5%). OpenAI describes Terminal-Bench as the extra consultant benchmark for the type of work Codex really does: “complicated command-line workflows requiring planning, iteration, and power coordination.” On SWE-bench Pro (Public), GPT-5.5 scores 58.6% per OpenAI’s launch information, behind Claude Opus 4.7 (64.3%) however forward of earlier GPT generations. Claude Opus 4.7 nonetheless leads on code high quality for multi-file, long-horizon software program engineering; GPT-5.5 leads on terminal-native, DevOps-style agentic execution.

Note on SWE-bench Verified: OpenAI stopped self-reporting this metric in February 2026 as a result of contamination considerations. Third-party trackers present GPT-5.5 round 88.7%, however OpenAI’s official place is that this benchmark is now not a dependable frontier measure. They report SWE-bench Pro as a substitute.

GPT-5.5 is on the market in ChatGPT (Plus, Pro, Business, Enterprise, Edu) and throughout Codex (CLI, IDE extensions, and the Codex net product). API entry was introduced and is rolling out. API pricing: $5/$30 per million tokens for gpt-5.5, a 2× bounce from GPT-5.4. More than 85% of OpenAI staff now use Codex weekly — a sign of inside confidence in the product past benchmark numbers.

Best for: Developers centered on terminal-native, DevOps, and pipeline automation workflows the place Terminal-Bench efficiency is the main sign; additionally the strongest alternative for fire-and-forget execution through the Codex net product.

#3. Cursor

SWE-bench Verified: ~51.7% (default config; rises considerably with Opus 4.7 backend) Task completion pace: ~30% sooner than GitHub Copilot in head-to-head testing ARR: $2 billion (February 2026) Pricing: $20/month (Pro), $60/month (Pro+), Enterprise tiers above

Cursor reached $2 billion ARR in February 2026 — doubling from $1 billion in November 2025 — and is reportedly in talks to boost roughly $2 billion at a $50 billion-plus valuation, with Thrive Capital and Andreessen Horowitz. These figures mirror actual developer adoption, not benchmark-driven hype.

Cursor’s SWE-bench determine (~51.7%) represents its default mannequin configuration. Because Cursor is model-agnostic and helps Claude Opus 4.7, GPT-5.5, Gemini 3.1 Pro, and Grok, its efficient benchmark ceiling scales with the mannequin chosen — a developer operating Cursor with Opus 4.7 will get materially completely different efficiency from one utilizing a default configuration. The 30% activity completion pace benefit over Copilot displays Cursor’s editor-native structure, which eliminates context-switching overhead between a terminal agent and a separate IDE.

Cursor is a VS Code fork rebuilt round AI at each layer. Its Plan/Act mode offers builders a structured workflow: plan, assessment, then execute. Background Agents (Pro+ tier, $60/month) run autonomous coding periods on cloud VMs in parallel, with out blocking the fundamental editor. Per-task mannequin choice — quick mannequin for autocomplete, reasoning-heavy mannequin for complicated edits — offers fine-grained price management.

Cursor is its personal editor, not a plugin. Developers utilizing JetBrains, Neovim, or Xcode can’t use Cursor with out switching editors. That constraint is actual and limits its enterprise footprint in comparison with Copilot.

Best for: VS Code-native builders who need the finest AI-native IDE expertise and are keen to pay for the built-in workflow.

#4. Gemini CLI (Google DeepMind)

SWE-bench Verified (Gemini 3.1 Pro): 80.6% Terminal-Bench 2.0 (Gemini 3.1 Pro): 68.5% Context Window: 1 million tokens Pricing: Free tier through Google AI Studio; Google One AI Premium for greater limits

Gemini CLI is Google DeepMind’s open-source coding agent (npm set up -g @google/gemini-cli). Its main mannequin is Gemini 3.1 Pro — launched February 19, 2026 — which scores 80.6% on SWE-bench Verified and 68.5% on Terminal-Bench 2.0. Gemini 3 Flash (roughly 78% SWE-bench Verified) is the lighter, cheaper choice inside the similar CLI. These are distinct capabilities and the Gemini 3.1 Pro quantity is the appropriate headline for what Gemini CLI can ship at full configuration.

Gemini 3.1 Pro additionally scores strongly on a number of non-coding benchmarks: ARC-AGI-2 (77.1%), GPQA Diamond (94.3%), and BrowseComp (85.9%), making it a powerful choice for scientific computing, agentic analysis workflows, and duties that blend coding with deep reasoning. For Google Cloud-native groups, Gemini CLI integrates straight with GCP, Vertex AI, and Android Studio.

The free tier is its most strategically distinctive function. Solo builders, college students, and open-source maintainers who can’t justify a $20–$200/month coding agent subscription have a reputable frontier-quality choice right here. At 80.6% SWE-bench Verified — matching Claude Opus 4.6 and forward of GitHub Copilot’s default configuration — this isn’t a compromise free tier. It is a genuinely aggressive product that removes price as a barrier to entry.

Best for: Cost-sensitive builders, Google Cloud groups, and particular person contributors who need frontier mannequin high quality and not using a month-to-month subscription.

#5. GitHub Copilot (Microsoft/GitHub)

SWE-bench Verified (Agent Mode, default mannequin): ~56% Adoption: 4.7 million paid subscribers (January 2026) Pricing: $10/month (Pro), $19/month (Business), $39/month (Pro+), Enterprise customized pricing; AI Credits billing transition on June 1, 2026

GitHub Copilot will not be the most succesful agent on this checklist by benchmark, however it’s the most generally deployed. With 4.7 million paid subscribers — 75% year-over-year progress — and 76% developer consciousness per GitHub’s Octoverse report, Copilot is the baseline AI coding software at most enterprise software program organizations. Microsoft CEO Satya Nadella confirmed in early 2026 that Copilot now represents a bigger enterprise than GitHub itself.

Two vital updates for the present pricing image: GitHub added a Copilot Pro+ tier at $39/month that unlocks the full mannequin roster and better compute limits. More considerably, GitHub introduced that Copilot is moving to AI Credits-based billing on June 1, 2026, which implies sure agent actions, premium mannequin calls, and background activity execution will draw from a credit pool fairly than being included in the flat month-to-month charge. Base plan costs are unchanged as of the announcement, however whole price for heavy agentic use could enhance relying on how credit are consumed.

On mannequin choice: in February 2026, GitHub made Copilot a multi-model platform by including Claude and OpenAI Codex as accessible backends for Copilot Business and Pro prospects. The 56% SWE-bench determine displays the default proprietary Copilot mannequin. Configuring it to make use of Claude Opus 4.7 or GPT-5.5 would push that quantity considerably greater — although premium mannequin calls draw from the credit pool beneath the new billing mannequin.

At $10/month for people and $19/month for enterprise seats, Copilot’s price-to-capability ratio is the strongest entry level for enterprise groups that want predictable licensing, SOC 2 compliance, audit logs, and broad IDE help throughout VS Code, JetBrains, Visual Studio, Neovim, and Xcode. In enterprise procurement, compliance posture typically outweighs just a few SWE-bench share factors.

Best for: Enterprise groups that want predictable licensing, compliance posture, and broad IDE help throughout a number of environments.

#6. Devin 2.0 (Cognition AI)

Performance: Higher on clearly scoped duties; considerably weaker on ambiguous or complicated duties Pricing (up to date April 14, 2026): Free, Pro $20/month, Max $200/month, Teams usage-based with $80/month minimal, Enterprise customized

Devin holds a particular place on this class’s historical past. Its 13.86% SWE-bench Lite rating at launch in early 2024 — the first time any AI system had autonomously resolved actual GitHub points at significant scale — was industry-defining. By at present’s requirements, each software above it on this rating has surpassed that quantity by an element of 4 or extra.

Devin 2.0 is a considerably completely different product. It runs in a completely sandboxed cloud setting with its personal IDE, browser, terminal, and shell. You assign a activity; Devin produces a step-by-step plan you possibly can assessment and edit; then it writes code, runs assessments, and submits a pull request. Interactive Planning and Devin Wiki — which auto-indexes repositories and generates structure documentation — deal with two of the authentic’s largest criticisms.

On well-scoped, well-defined duties — framework upgrades, library migrations, tech debt cleanup, take a look at protection additions — Devin stories greater success charges, with unbiased developer testing persistently exhibiting sturdy outcomes on clearly specified work. Reliability drops sharply for ambiguous or architecturally complicated duties; one documented group take a look at discovered way more failures than successes throughout 20 different duties, highlighting that activity specification high quality straight determines output high quality.

On pricing: Cognition retired its older Core and ACU-based self-serve plans on April 14, 2026 and launched cleaner tiers: Free, Pro at $20/month, Max at $200/month, Teams usage-based with an $80/month minimal, and Enterprise with customized pricing. If you could have seen the earlier “$20 Core + $2.25/ACU” pricing in different articles, it’s now not present.

Cognition additionally partnered with Cognizant in January 2026 to combine Devin into enterprise engineering transformation choices, and launched Cognition for Government in February 2026 with FedRAMP High authorization in progress — signaling a deliberate push into institutional deployments.

Best for: Teams with clearly scoped, well-specified engineering duties — migrations, take a look at era, framework upgrades — the place the price of reviewing AI output is decrease than the price of doing the work manually.

#7. OpenHands / OpenDevin (All-Hands AI)

SWE-bench Verified: 72% GAIA Benchmark: 67.9% License: MIT Pricing: Free to self-host; pay solely for mannequin API inference

OpenHands (previously OpenDevin, rebranded in late 2024 beneath the All-Hands AI group) is the open-source group’s reply to Devin. With sturdy open-source adoption seen by GitHub exercise and group utilization, and a 72% SWE-bench Verified rating, it matches or exceeds industrial brokers at a number of value factors.

OpenHands helps 100+ LLM backends — any OpenAI-compatible API, together with Claude, GPT-5, Mistral, Llama, and native fashions through Ollama. The CodeAct agent can execute code, run terminal instructions, browse the net, and work together with web-based improvement instruments inside a Docker sandbox. Its 67.9% on the GAIA benchmark confirms that net interplay capabilities are substantive.

The bring-your-own-key mannequin means zero platform markup — you pay inference prices on to your mannequin supplier. For open-source initiatives, budget-constrained groups, and builders who need full auditability of agent habits, it’s the strongest choice on this tier. Self-hosting requires Docker and entry to an LLM supplier API; there is no such thing as a hosted SaaS product.

Best for: Open-source groups, builders who need full management and auditability, and budget-conscious practitioners who have already got API credit with a serious mannequin supplier.

#8. Augment Code

SWE-bench Verified (self-reported, Augment harness): 70.6% Differentiator: Full repository context engine; MCP-interoperable Pricing: Team and Enterprise tiers

Augment Code’s 70.6% SWE-bench rating is self-reported utilizing Augment’s personal harness and published on Augment’s engineering blog. As with all agent-scaffolding-dependent scores, it needs to be learn as “what Augment + Opus 4.5 achieves with Augment’s context engine,” not a standalone mannequin quantity. That caveat said, the architectural perception behind the rating is actual and independently validated: in the February 2026 scaffold comparability described earlier, Augment’s context-first strategy outperformed different frameworks operating the similar mannequin by 17 issues out of 731.

The core innovation is that Augment’s engine indexes a complete repository earlier than the agent begins work — fairly than constructing context reactively from open information. For enterprise groups working in giant, mature monorepos, this produces measurably higher outcomes on duties that require cross-module reasoning. Augment additionally exposes its context engine through MCP (Model Context Protocol), making it interoperable with different brokers. A developer might use Augment’s indexing whereas operating Claude Code or Codex for era.

Best for: Enterprise groups with giant, mature codebases who want deeper repository context than single-session instruments present.

#9. Aider

Pricing: Free (open-source); pay for mannequin API inference Architecture: Git-native terminal agent

Aider is the git-native coding agent: it operates straight in your native repository and constructions its adjustments as a collection of atomic git commits with descriptive messages — a workflow that meshes effectively with groups that do cautious code assessment. It helps any OpenAI-compatible mannequin, giving the similar model-agnostic flexibility as OpenHands, and runs totally in the terminal with no IDE dependency.

Where Aider lags behind higher-ranked instruments is on complicated, multi-step agentic duties that require net entry, browser interplay, or long-horizon planning. It is a robust software inside a clearly outlined scope — terminal-based, git-integrated coding — fairly than a general-purpose autonomous agent.

Best for: Developers who prioritize git-native workflows, clear commit histories, and full management over their editor setting.

#10. Cline (Open-Source)

Cline is VS Code’s hottest open-source AI coding extension, with 5 million installs claimed throughout supported marketplaces. It ships with Plan/Act modes, can run terminal instructions, edit information throughout a repository, automate browser testing, and prolong by any MCP server. The bring-your-own-key structure means zero inference markup. Roo Code, a group fork, provides further customization for groups that need to transcend the core undertaking.

Best for: VS Code builders who need open-source flexibility, full code auditability, and the potential to convey their very own fashions with out platform markup.

Marktechpost’s Visual Explainer

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Research Report · May 2026

Best AI Agents for Software Development — Ranked

A benchmark-driven look at the present area

10 brokers ranked by SWE-bench Verified, SWE-bench Pro, Terminal-Bench 2.0, and actual developer utilization. Includes the contamination warning each rating is lacking.

Agents Ranked
10
Top SWE-bench Score
93.9%
Claude Mythos Preview (restricted)
Best Available
87.6%
Claude Code / Opus 4.7
What’s inside
Rankings · Benchmark methodology · SWE-bench contamination · Security & governance · Layered stack information

02 / 14
⚠ Benchmark Alert

The benchmark everybody cites is now disputed

SWE-bench Verified — contaminated as of Feb 2026

On February 23, 2026, OpenAI’s Frontier Evals staff stopped reporting SWE-bench Verified scores. Their audit discovered 59.4% of the hardest take a look at instances had basic flaws, and that each main frontier mannequin — GPT-5.2, Claude Opus 4.5, Gemini 3 Flash — might reproduce gold-patch options verbatim from reminiscence utilizing solely a activity ID. The benchmark was measuring coaching information publicity, not coding potential.

OpenAI now recommends SWE-bench Pro for frontier coding analysis. Other labs nonetheless publish Verified scores — they continue to be helpful for broad course, however shouldn’t be handled as clear, goal measurements. All scores on this information are labeled accordingly.

Key rule
Treat SWE-bench Verified as directional. Prefer SWE-bench Pro or your individual held-out analysis on actual code.

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Benchmark Guide

Three benchmarks — what every really measures

SWE-bench Verified

~88%

500 actual GitHub points (Python solely). Now contaminated. Self-reported. Use as course solely.

SWE-bench Pro

23–64%

1,865 duties throughout 4 languages. Scores fluctuate wildly by harness — sub-25% beneath SWE-Agent, 64% beneath optimized scaffolds. Same benchmark, completely different situations.

Terminal-Bench 2.0

~82%

Terminal workflows: shell, DevOps, pipelines. GPT-5.5 leads at 82.7%. Harness issues: similar mannequin can rating 57.5% vs 64.7% relying on setup.

Scaffolding impact

±17

Same Opus 4.5 mannequin, three frameworks, 731 issues — 17 issues aside. Scaffolding ≈ mannequin high quality.

Bottom line
No benchmark is a clear proxy. Run 50–100 duties by yourself codebase earlier than committing to any software.

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1

Claude Code — Anthropic

Opus 4.7 · Released April 16, 2026

SWE-bench Verified

87.6%

SWE-bench Pro

64.3%

Terminal-Bench 2.0

69.4%

CursorBench

70%

Self-verification (writes assessments, runs them, fixes failures earlier than surfacing outcomes). Multi-agent coordination for parallel workstreams. 1M token context for giant repos. Pricing: $20–$200/month subscription · API $5/$25 per 1M tokens.

Best for
Complex multi-file engineering, giant codebases, long-horizon refactoring — highest code high quality of any publicly accessible agent.

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2

OpenAI Codex — GPT-5.5

Released April 23, 2026 · CLI runs regionally in your machine

Terminal-Bench 2.0

82.7% #1

SWE-bench Pro (Public)

58.6%

SWE-bench Verified*

~88.7%

Important: The Codex CLI is a neighborhood terminal software — cloud execution is the Codex Web/IDE product. *OpenAI doesn’t self-report Verified scores; ~88.7% is from third-party trackers. Pricing: CLI open-source (ChatGPT plan or API key required) · Plus $20/mo · API $5/$30 per 1M tokens.

Best for
Terminal-native DevOps workflows, pipeline automation, fire-and-forget cloud execution through Codex Web — and the strongest Terminal-Bench rating accessible.

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3

Cursor

AI-native VS Code fork · $2B ARR (Feb 2026)

Default SWE-bench
~51.7%
model-dependent
Speed vs Copilot
+30%
activity completion
With Opus 4.7
↑↑
ceiling rises to 87.6%

Model-agnostic: helps Claude Opus 4.7, GPT-5.5, Gemini 3.1 Pro, Grok. Plan/Act mode for structured workflows. Background Agents (Pro+ $60/mo) run autonomous cloud periods in parallel. Important limitation: VS Code solely — no JetBrains, Neovim, or Xcode help.

Best for
VS Code-native builders who need the finest AI-integrated every day modifying expertise. $20/month Pro is the most efficient IDE-native entry level.

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4

Gemini CLI — Google DeepMind

Gemini 3.1 Pro · Free tier accessible

SWE-bench Verified

80.6%

Terminal-Bench 2.0

68.5%

GPQA Diamond

94.3%

ARC-AGI-2

77.1%

Primary mannequin: Gemini 3.1 Pro (80.6%). Gemini 3 Flash (~78%) is the lighter/cheaper choice. 1M token context. Install: npm set up -g @google/gemini-cli. Free tier removes all price limitations.

Best for
Cost-sensitive builders, Google Cloud groups, and anybody wanting frontier-quality coding and not using a month-to-month subscription.

08 / 14
5

GitHub Copilot

4.7M paid subscribers · Multi-model platform since Feb 2026

Default SWE-bench
~56%
Agent Mode
Pro tier
$10/mo
AI Credits
Jun 1
billing transition 2026

Now helps Claude Opus 4.7 and GPT-5.5 as backends (premium mannequin calls draw from AI Credits). Works throughout VS Code, JetBrains, Visual Studio, Neovim, Xcode. Pricing: $10 Pro · $19 Business · $39 Pro+ · Enterprise customized.

SOC 2 compliant
Audit logs
6 IDEs
Best for
Enterprise groups needing predictable licensing, compliance posture, and broad IDE help throughout each setting.

09 / 14
Autonomous Agents

#6 Devin 2.0 & #7 OpenHands

#6 Devin 2.0 — Cognition AI

Sandboxed

Full cloud VM with IDE, browser, terminal. Plans + executes + submits PRs autonomously. Higher success on clearly scoped duties; considerably weaker on ambiguous work.

Updated Apr 14: Free · Pro $20 · Max $200 · Teams $80/mo min · Enterprise

#7 OpenHands — All-Hands AI

72%

SWE-bench Verified. MIT licensed, free to self-host. 100+ LLM backends. CodeAct agent with Docker sandboxing and net looking. GAIA: 67.9%.

Pay solely for API inference · No hosted SaaS

Choose Devin if
You have clearly scoped, well-specified duties (migrations, take a look at protection, framework upgrades) and capability to assessment AI output earlier than merging.

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Open-Source Tier

#8 Augment Code · #9 Aider · #10 Cline

#8 Augment Code

70.6%*

#9 Aider

model-dep

#10 Cline

model-dep

*Augment rating is self-reported through Augment’s personal harness

Augment Code — full repo context indexing earlier than the agent begins; MCP-interoperable. Best for giant enterprise monorepos.
Aider — git-native terminal agent producing atomic commits. Best for clear commit-level workflows.
Cline — 5M installs, VS Code extension, bring-your-own-key, zero inference markup. Roo Code is the group fork.

All three
Pay solely for API inference (no platform markup). Full code auditability. Effective ceiling scales together with your chosen mannequin.

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Key Insight

The scaffolding drawback — similar mannequin, 17 issues aside

Problems examined
731
Model used
Same
Claude Opus 4.5
Score hole
17
issues aside (Feb 2026)

In February 2026, three completely different agent frameworks ran an identical fashions towards the similar 731 SWE-bench issues. They scored 17 points aside — a 2.3-point hole — purely from scaffolding variations. The winner (Augment Code) listed the full repository earlier than beginning. The runner-up used a typical tool-call loop. The third used one-shot era.

Implication: A benchmark rating labeled with a mannequin identify displays the mannequin AND the scaffold round it. Choosing an agent primarily based solely on the mannequin identify — “I’ll use whichever software runs Opus 4.7” — ignores the variable that usually issues most.

Rule of thumb
Context technique + retrieval high quality + verification loops ≈ mannequin model, with regards to benchmark outcomes.

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Production Teams

Security & governance — what benchmarks don’t measure

🔒 Sandboxing

Devin and Codex Web run in remoted cloud VMs. Claude Code and Cline run with native system entry by default. Know the distinction.

🔑 Secret publicity

Agents that learn .env information and config dirs are an energetic assault floor. Explicit entry controls are non-optional.

💉 Prompt injection

Malicious strings in code feedback, concern descriptions, or docs can instruct brokers to take unauthorized actions. This is a recognized vulnerability class.

📋 Audit logging

GitHub Copilot and Augment Code have specific audit log options. Open-source instruments usually don’t — instrument your self or select a software that does.

Before you ship AI-generated code
Define your human assessment gate explicitly. The organizations operating agentic coding safely in 2026 deal with that gate as a coverage, not a developer choice.

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Developer Patterns

How 70% of builders really stack these instruments

Layer 1 — Terminal agent

Claude Code or Codex for complicated work: multi-file refactors, architectural adjustments, tough debugging. Use when a activity would take a senior engineer hours.

Layer 2 — IDE extension

Cursor or Copilot for every day modifying: inline completions, fast edits, take a look at era. Eliminates context-switching overhead for routine work.

Layer 3 — Open-source software

Aider, Cline, or OpenHands for mannequin flexibility, zero markup on inference, and full auditability. Fallback when industrial instruments have outages or value adjustments.

Most frequent setup

Claude Code / Codex for laborious duties + Copilot or Cursor for every day circulation + one open-source software for flexibility. Layer 1 + Layer 2 prices ~$30–40/mo.

The level
Using a number of instruments isn’t indecision — it displays real specialization. No single agent dominates all three layers with equal high quality at present.

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Summary Rankings · May 2026

Full leaderboard

# Agent Key Metric Best For
Claude Mythos Preview 93.9% SWE-b-V (restricted) Not publicly accessible
1 Claude Code (Opus 4.7) 87.6% SWE-b-V Code high quality, multi-file duties
2 OpenAI Codex (GPT-5.5) 82.7% Terminal-Bench Terminal / DevOps workflows
3 Cursor ~51.7% default (↑ w/ Opus 4.7) IDE-native every day dev
4 Gemini CLI 80.6% SWE-b-V Free tier, Google Cloud
5 GitHub Copilot ~56% default Agent Mode Enterprise, multi-IDE
6 Devin 2.0 Sandboxed autonomous Well-scoped duties
7 OpenHands 72% SWE-b-V Open-source, any mannequin
8 Augment Code 70.6%* (self-reported) Large enterprise codebases
9 Aider Model-dependent Git-native CLI
10 Cline Model-dependent VS Code open-source
SWE-b-V = SWE-bench Verified (self-reported, see contamination observe). Read the full article for main supply hyperlinks.

How Developers Are Actually Using These Tools in 2026

The benchmark-maximizing technique and the productivity-maximizing technique aren't the similar factor. Based on group information and developer surveys, roughly 70% of productive skilled builders in 2026 use two or extra instruments concurrently.

The modal sample is a layered stack:

Terminal brokers for complicated duties. Claude Code or Codex for multi-file refactoring, architectural adjustments, tough debugging, or any activity that requires holding substantial codebase context. These instruments earn their greater price on work that will take a senior engineer hours.

IDE extensions for every day modifying. Cursor or GitHub Copilot for inline completions, fast edits, take a look at era, and ambient help that hurries up routine coding work. The cognitive overhead of switching between a terminal agent and a separate editor is actual; IDE-native instruments remove it for on a regular basis duties.

Open-source instruments for mannequin flexibility. Aider, Cline, or OpenHands if you need to take a look at a brand new mannequin, keep away from platform markup, or want full auditability of agent habits. These additionally function a fallback when industrial instruments have outages or pricing adjustments.

What the Next 12 Months Look Like

MCP as infrastructure. The Model Context Protocol is rising as a shared customary that lets instruments share context, hand off duties, and compose capabilities. Augment's context engine uncovered through MCP, and Copilot accepting Claude and Codex as backends, counsel the area is shifting towards interoperability fairly than winner-take-all consolidation.

Autonomous PR pipelines. GitHub Copilot's cloud agent, Codex's background execution mannequin, and Devin's end-to-end PR workflow all level at the similar future: AI brokers that course of points from a backlog, work in a single day, and floor reviewed pull requests in the morning. The bottleneck is now not AI high quality — it's the assessment bandwidth of human engineers and the governance frameworks organizations are constructing round autonomous code adjustments.

Enterprise governance as a differentiator: Gartner initiatives 40% of enterprise purposes will embody task-specific AI brokers by finish of 2026, up from lower than 5% at present. Compliance posture, audit logs, information dealing with ensures, and safety certifications will more and more be the deciding think about enterprise procurement — not SWE-bench place.

Open-source convergence: OpenHands at 72% SWE-bench Verified, and open-source fashions like MiniMax M2.5 (80.2% SWE-bench Verified) now matching proprietary frontier efficiency, present the high quality hole between open and closed methods is closing. The remaining benefits for industrial instruments are scaffolding sophistication, enterprise help, and product polish — not uncooked mannequin functionality.

The Mythos ceiling: Claude Mythos Preview at 93.9% SWE-bench Verified — roughly 5 factors above the finest publicly accessible mannequin — alerts that the efficiency frontier is effectively forward of what builders can at the moment entry. When fashions at that tier attain normal availability, count on the class rating to shift once more.


Primary sources: Anthropic Claude Opus 4.7 announcement · AWS blog: Claude Opus 4.7 on Amazon Bedrock · OpenAI: Introducing GPT-5.5 · OpenAI: Why we no longer evaluate SWE-bench Verified · OpenAI: Introducing GPT-5.3-Codex · Scale AI SWE-bench Pro public leaderboard · SWE-bench Pro arXiv paper · Official SWE-bench leaderboard · GitHub: openai/codex · Cognition: New self-serve plans for Devin · GitHub Blog: Copilot moving to usage-based billing · GitHub Changelog: Claude and Codex for Copilot Business & Pro · Augment Code: Auggie tops SWE-bench Pro · Anthropic Project Glasswing · Google DeepMind Gemini 3.1 Pro model card · OpenHands GitHub repository

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