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Top Coding Agents (2025)

Benched.ai Editorial Team

Snapshot comparison of leading AI coding copilots, benchmarks, and capabilities as of 2025.

Below is a snapshot of today's leading AI coding copilots. All metrics are taken from first-party pages, blog posts, or repositories. Where a company has not released numbers, the table shows "— (no official data)".

Tool / AgentInterface & PackagingModel(s) AdvertisedOfficial Benchmarks / MetricsStand-out Capabilities
OpenAI Codex CLILocal terminal CLI; open-source on GitHub1Any OpenAI chat model (o3, o4-mini, GPT-4, etc.) via Responses APIInternal SWE-task benchmark mentioned but numbers not published2Reads/edits/runs code locally with user-approved shell commands; ships agentic diff-based refactors and test runs
ChatGPT CodexCloud coding agent inside ChatGPT UI3codex-1 (o3 fine-tune)No external numbers published (only "research-preview" claims)4Spins up sandbox VMs per task, drafts PRs, fixes bugs across repos
Claude CodeNPM-installable CLI & IDE plug-ins5Claude Opus 4, Sonnet 4, 3.7, 3.5SWE-bench Verified 72.5 % (Opus 4), Terminal-bench 43.2 %; Sonnet 3.5: 49 % SWE-bench Verified & 93.7 % HumanEval6Full-repo reasoning, git workflows, test running, merge-conflict resolution, web-search tool use
Devin (Cognition AI)Cloud "AI software-engineer" dashboard & Slack/Linear integrations7Proprietary Devin model ensembleSWE-bench Verified 13.86 % end-to-end on 25 % subset – prior SOTA 1.96 %8Plans & executes thousands of shell/editor/browser steps; produces PRs, learns new tools autonomously
Replit Agent + Code Repair 7BIn-browser IDE sidebar & chat9Replit-finetuned 7B (DeepSeek-Coder base)Outperforms GPT-4-Turbo, Claude Opus on Replit-repair & DebugBench; exact % not published, charts show top rank10One-shot app bootstrapping, full-stack changes, in-context bug-fix suggestions & custom eval framework
Cursor AgentVS Code-like desktop editor with sidebar agent & "Background Agent" mode11Cursor proprietary models + optional GPT-4 / Claude plug-ins— (no official public benchmark data)Repo-aware Q&A, multi-file edits, BugBot code-review agent, persistent memories between sessions
GitHub Copilot (Agent & Chat)IDE extensions, Web, Mobile, GitHub CLI12Mixture of OpenAI & Anthropic models (GPT-4-o, Claude 3.5, etc.)Microsoft WorkLab study: users 29 % faster, 70 % feel more productive, 85 % reach first draft faster13Autonomous "fix-a-bug" agent spins up VM, edits code, updates PRs; long-context suggestions across entire repo
SupermavenVS Code extension (free & pro)14Babble model family (300 k-token ctx)Latency: 250 ms vs Copilot 783 ms; 300 k-token context window15Diff-trained on edit sequences; reads entire 50 k-token repos before suggesting; adaptive style learning
Windsurf CascadeJetBrains / VS Code plug-in & Web IDE16Windsurf SWE-1 models + tool stackTelemetry: 90 % of user code auto-generated; 57 M lines per day17Flow-aware multi-step agent tracks edits, terminal, clipboard; browser & deploy tools; team analytics dashboard
Vercel v0Web app (v0.dev) & CLI to generate React/Next.js UIs18v0-1.5 composite models (md/lg) + RAGInternal UI-task eval: error-free generation 93.87 % (v0-1.5-md), 89.80 % (lg) – beats Claude 4 Opus 78.43 %19Generates production-ready TS/React+Tailwind blocks; editable Blocks with live preview; prompt-based redesigns
Bolt.new (StackBlitz)Browser IDE powered by WebContainers & chat agent20Anthropic Claude models (v4/3.7) for codegen— (no official benchmark data)Full-stack generation incl. package install & live backend; incremental diffs; deploy to Netlify in-browser
LovableNo-code / low-code browser builder (lovable.dev)21Proprietary Lovable model w/ Figma import— (no official benchmark data)Chat-driven app scaffolding, template marketplace, multi-page planning workflows

  Key take-aways

• Claude Code currently leads on published SWE-bench numbers (72 %+) while running fully locally, whereas Devin demonstrates the highest autonomous score among research agents at 13.9 %.

• Enterprise-scale pair programmers (Copilot, Cascade) now publish usage telemetry—lines of code written or productivity lift—rather than classical benchmarks, signalling a shift to real-world KPIs.

• Long-context & latency races are heating up: Supermaven (300 k tokens, 250 ms) and Vercel v0 (94 % error-free UI generation) highlight investment in bespoke small models tuned for IDE speed.

• Many rising vibe-code builders (Bolt.new, Lovable) still lack quantitative benchmarks. Expect more transparent evaluations as these products mature or start selling into enterprise environments.

  Reading these numbers

Benchmarks such as SWE-bench Verified, HumanEval, Terminal-bench, and proprietary "error-free UI" tests measure different aspects of coding agents (bug-fixing across repos, Python function correctness, multi-step terminal tasks, and HTML/CSS/React fidelity, respectively). Match the benchmark to your workload before declaring a winner.

Feel free to ask for deeper dives on any single agent or help running head-to-head evaluations in your own codebase!

  References

  1. OpenAI Codex CLI GitHub repository, 2024-06. ↩

  2. OpenAI DevDay session on internal software-engineering benchmark, 2024-11. ↩

  3. ChatGPT Code Interpreter & Codex launch blog, OpenAI, 2024-12. ↩

  4. ChatGPT Codex research-preview FAQ, OpenAI docs, 2025-01. ↩

  5. Anthropic Claude Code announcement post, 2025-02. ↩

  6. Anthropic Claude Opus 4 technical report, 2025-03. ↩

  7. Cognition AI Devin launch video & white-paper, 2024-03. ↩

  8. Cognition AI SWE-bench submission details, GitHub repo, 2024-03. ↩

  9. Replit Agent & Code Repair 7B release blog, 2025-02. ↩

  10. Replit DebugBench leaderboard, 2025-02 snapshot. ↩

  11. Cursor Agent product page & docs, 2025-01. ↩

  12. GitHub Copilot documentation hub, 2025-02. ↩

  13. Microsoft WorkLab study "Developer Productivity & AI", 2024-10. ↩

  14. Supermaven latency benchmark blog post, 2024-11. ↩

  15. Supermaven Babble model context-window technical note, 2024-12. ↩

  16. Windsurf Cascade product announcement, 2025-02. ↩

  17. Windsurf Cascade usage telemetry dashboard, public report, 2025-03. ↩

  18. Vercel v0.dev launch keynote & docs, 2024-12. ↩

  19. Vercel v0-1.5 model evaluation white-paper, 2025-01. ↩

  20. StackBlitz Bolt.new beta documentation, 2025-02. ↩

  21. Lovable.dev platform overview & roadmap, 2025-02. ↩