Model comparison
Claude 3.7 Sonnet vs GPT-5.1-Codex
Claude 3.7 Sonnet and GPT-5.1-Codex score almost the same on the Noometry Index (39.5 vs 38.6), so choose on price, context window or the category you care about most.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. Claude 3.7 Sonnet scores higher in 1 category and GPT-5.1-Codex in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude 3.7 Sonnet leads 37.5 to 30.3.
- The biggest single-benchmark swing is SWE-bench Verified (bash only): 52.8% for Claude 3.7 Sonnet and 66% for GPT-5.1-Codex.
Side by side
| Claude 3.7 Sonnet | GPT-5.1-Codex | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 39.5 | 38.6 |
| Released | 2025-02-24 | 2025-11-12 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 58 | 6 |
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Category by category
Coding GPT-5.1-Codex leads
Claude 3.7 Sonnet: 40.6 (#136), GPT-5.1-Codex: 41.9 (#116)
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| SWE-bench Verified (bash only) | 52.8% | 66% |
| SWE-bench Verified | 61% | — |
| Aider Polyglot | 64.9% | — |
| LMArena WebDev | — | 1337 |
| GSO | 3.8% | — |
| LiveBench Coding | 74.5% | — |
| LMArena Coding | 1361 | — |
| CadEval | 54% | — |
| ALE-Bench | — | 1,245 |
Agentic & Tool Use GPT-5.1-Codex leads
Claude 3.7 Sonnet: 34.1 (#50), GPT-5.1-Codex: 38.0 (#33)
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| METR Time Horizons | 60% | 70.8% |
| Terminal-Bench | — | 60.4% |
| TheAgentCompany | 30.9% | — |
| Cybench | 20% | — |
| DeepResearch Bench | 43.6% | — |
| OSWorld | 35.8% | — |
Reasoning Not comparable
Claude 3.7 Sonnet: 18.6 (#277), GPT-5.1-Codex: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| ARC-AGI-2 | 0.9% | — |
| SimpleBench | 46.4% | — |
| ARC-AGI-1 | 28.6% | — |
| EnigmaEval | 4.2% | — |
| LiveBench Reasoning | 87.8% | — |
| LMArena Hard Prompts | 1333 | — |
| LiveBench Data Analysis | 74% | — |
| Epoch Capabilities Index | 141.16 | — |
| ForecastBench | 61.8 | — |
| LiveBench | 76.1% | — |
Math Claude 3.7 Sonnet leads
Claude 3.7 Sonnet: 37.5 (#153), GPT-5.1-Codex: 30.3 (#235)
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 57.8% | — |
| ProofBench | — | 9% |
| Omni-MATH | 33% | — |
| LiveBench Math | 79% | — |
| LMArena Math | 1337 | — |
| MATH Level 5 | 91.2% | — |
| FrontierMath (Feb 2025 set) | 4.1% | — |
Knowledge Not comparable
Claude 3.7 Sonnet: 39.8 (#130), GPT-5.1-Codex: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| GPQA Diamond | 79.7% | — |
| Humanity's Last Exam | 8% | — |
| MMLU-Pro | 78.4% | — |
| Confabulations | 14.7% | — |
| GPQA (HELM) | 60.8% | — |
| LMArena Expert | 1321 | — |
Multimodal Not comparable
Claude 3.7 Sonnet: 33.7 (#95), GPT-5.1-Codex: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| LMArena Vision | 1169 | — |
| GeoBench | 68% | — |
| VPCT | 39% | — |
| SpatialViz-Bench | 33.9% | — |
Multilingual Not comparable
Claude 3.7 Sonnet: 44.1 (#179), GPT-5.1-Codex: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| LMArena Non-English | 1296 | — |
| LMArena Chinese | 1299 | — |
| LMArena French | 1303 | — |
| LMArena German | 1301 | — |
| LMArena Japanese | 1267 | — |
| LMArena Korean | 1249 | — |
| LMArena Russian | 1311 | — |
| LMArena Spanish | 1298 | — |
Instruction Following Not comparable
Claude 3.7 Sonnet: 72.9 (#125), GPT-5.1-Codex: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| LiveBench Instruction Following | 81.3% | — |
| IFEval | 83.4% | — |
| LMArena Instruction Following | 1352 | — |
Long Context Not comparable
Claude 3.7 Sonnet: 50.3 (#10), GPT-5.1-Codex: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| Fiction.LiveBench | 83.3% | — |
| LMArena Longer Query | 1373 | — |
Writing & Preference Not comparable
Claude 3.7 Sonnet: 54.4 (#150), GPT-5.1-Codex: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.1-Codex |
|---|---|---|
| LMArena Text | 1314 | — |
| LMArena Creative Writing | 1332 | — |
| Short-Story Creative Writing | 81.1% | — |
| EQ-Bench Creative Writing | 1412 | — |
| WildBench | 81.4% | — |
| LMArena Multi-Turn | 1339 | — |
| LiveBench Language | 59.9% | — |
Frequently asked questions
Is Claude 3.7 Sonnet better than GPT-5.1-Codex?
Claude 3.7 Sonnet and GPT-5.1-Codex score almost the same on the Noometry Index (39.5 vs 38.6), so choose on price, context window or the category you care about most.
Is Claude 3.7 Sonnet or GPT-5.1-Codex better for coding?
GPT-5.1-Codex scores higher on coding benchmarks: 41.9 versus 40.6 in the Noometry coding category.
How many benchmarks do Claude 3.7 Sonnet and GPT-5.1-Codex share?
2 benchmarks have published results for both models. Claude 3.7 Sonnet has 58 scored results on Noometry and GPT-5.1-Codex has 6.