SWE-bench Verified: 2026 AI Leaderboard
Fix real GitHub issues in 12 open-source Python repos.
What it tests
SWE-bench Verified is a 500-issue subset of SWE-bench that has been human-validated as solvable. Each task is a real Python GitHub issue; the model is given the repo, the issue, and must produce a patch that makes the project's test suite pass.
How it is scored
Percentage of issues where the generated patch passes all hidden tests. This is end-to-end agentic coding, not just code-completion. Scores above 70% are state-of-the-art; a year ago it was 30%.
Why it matters
SWE-bench Verified is the closest industry-standard benchmark to 'can this model actually do my job'. It rewards code-reading, multi-file editing, and test-driven iteration -- not just autocomplete.
Leaderboard (6 models)
Sorted by SWE-bench Verifiedscore. Tier column shows the tool's overall AIToolTier rank, which blends this benchmark with pricing, features, and real-world usability.
| # | Model | Tier | SWE-bench Verified score | Variant | Overall |
|---|---|---|---|---|---|
| 1 | Claude (Anthropic) Claude Fable 5 (launched 2026-06-09; suspended 2026-06-12 by US gov order; RESTORED globally 2026-07-01 after controls lifted 6/30) -- vendor SWE-Bench Pro 80.3% (vs GPT-5.5 58.6%); #1 LMArena Elo 1510 and #1 Artificial Analysis Index 65 as of 6/11. New default Sonnet 5 (2026-06-30): OSWorld-Verified 78.5%. Legacy Opus-line reasoning-suite scores shown below as baseline pending full third-party suites | A | 80.8% | SWE-bench Verified | 8.5/10 |
| 2 | DeepSeek DeepSeek V4-Pro (SWE-bench + Arena Elo third-party verified post-launch; knowledge rows are V3.x baseline pending V4 figures) | A | 80.6% | SWE-bench Verified | 8.0/10 |
| 3 | Mistral AI Mistral Medium 3.5 (vendor-published; third-party verification pending) | B | 77.6% | SWE-Bench Verified | 7.5/10 |
| 4 | Codex (OpenAI) GPT-5.2-Codex (launched 2026-04-23 -- SOTA on SWE-Bench Pro and Terminal-Bench 2.0; first-party scores below pending detailed third-party verification) | A | 72% | SWE-bench Verified | 8.3/10 |
| 5 | ChatGPT GPT-5.5 (launched 2026-04-23; scores below are the GPT-5.4 baseline -- GPT-5.5 launch benchmarks per OpenAI are logged in Known Issues, pending third-party verification) | A | 72% | SWE-bench Verified | 8.8/10 |
| 6 | Qwen (Alibaba) Qwen3.5-397B MoE | A | 69.4% | SWE-Bench Verified | 8.8/10 |
About SWE-bench Verified
- Creator
- Princeton & OpenAI, 2023 (Verified subset 2024)
- Unit
- % (max 100)
- Official source
- https://www.swebench.com/