Model comparison
Claude 3.7 Sonnet vs GPT-5.3 Chat
GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 39.4 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. Claude 3.7 Sonnet scores higher in 5 categories and GPT-5.3 Chat in 3 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.3 to 54.6.
Side by side
| Claude 3.7 Sonnet | GPT-5.3 Chat | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 39.4 | 42.1 |
| Released | 2025-02-24 | 2026-03-03 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 16K |
| Input $ / M tokens | — | $1.75 |
| Output $ / M tokens | — | $14 |
| Results tracked | 58 | 18 |
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Category by category
Coding Too close to call
Claude 3.7 Sonnet: 41.1 (#120), GPT-5.3 Chat: 40.8 (#124)
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1361 | 1408 |
| SWE-bench Verified | 61% | — |
| SWE-bench Verified (bash only) | 52.8% | — |
| Aider Polyglot | 64.9% | — |
| GSO | 3.8% | — |
| LiveBench Coding | 74.5% | — |
| CadEval | 54% | — |
Agentic & Tool Use Not comparable
Claude 3.7 Sonnet: 33.9 (#46), GPT-5.3 Chat: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| TheAgentCompany | 30.9% | — |
| Cybench | 20% | — |
| DeepResearch Bench | 43.6% | — |
| OSWorld | 35.8% | — |
| METR Time Horizons | 60% | — |
Reasoning GPT-5.3 Chat leads
Claude 3.7 Sonnet: 18.7 (#252), GPT-5.3 Chat: 27.3 (#105)
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1333 | 1399 |
| ARC-AGI-2 | 0.9% | — |
| SimpleBench | 46.4% | — |
| ARC-AGI-1 | 28.6% | — |
| EnigmaEval | 4.2% | — |
| LiveBench Reasoning | 87.8% | — |
| LiveBench Data Analysis | 74% | — |
| Epoch Capabilities Index | 141.16 | — |
| ForecastBench | 61.8 | — |
| LiveBench | 76.1% | — |
Math Too close to call
Claude 3.7 Sonnet: 35.7 (#137), GPT-5.3 Chat: 35.4 (#146)
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1336 | 1389 |
| OTIS Mock AIME 2024-2025 | 57.8% | — |
| Omni-MATH | 33% | — |
| LiveBench Math | 79% | — |
| MATH Level 5 | 91.2% | — |
| FrontierMath (Feb 2025 set) | 4.1% | — |
Knowledge Claude 3.7 Sonnet leads
Claude 3.7 Sonnet: 39.7 (#117), GPT-5.3 Chat: 38.2 (#137)
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1321 | 1397 |
| GPQA Diamond | 79.7% | — |
| Humanity's Last Exam | 8% | — |
| MMLU-Pro | 78.4% | — |
| Confabulations | 14.7% | — |
| GPQA (HELM) | 60.8% | — |
Multimodal Not comparable
Claude 3.7 Sonnet: 33.1 (#90), GPT-5.3 Chat: —
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Vision | 1169 | — |
| GeoBench | 68% | — |
| VPCT | 39% | — |
| SpatialViz-Bench | 33.9% | — |
Multilingual GPT-5.3 Chat leads
Claude 3.7 Sonnet: 44.3 (#174), GPT-5.3 Chat: 50.5 (#119)
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1296 | 1383 |
| LMArena Chinese | 1299 | 1433 |
| LMArena French | 1302 | 1398 |
| LMArena German | 1301 | 1384 |
| LMArena Japanese | 1268 | 1351 |
| LMArena Korean | 1249 | 1347 |
| LMArena Russian | 1311 | 1400 |
| LMArena Spanish | 1299 | 1371 |
Instruction Following Too close to call
Claude 3.7 Sonnet: 73.1 (#120), GPT-5.3 Chat: 73.0 (#124)
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1352 | 1378 |
| LiveBench Instruction Following | 81.3% | — |
| IFEval | 83.4% | — |
Long Context Claude 3.7 Sonnet leads
Claude 3.7 Sonnet: 50.2 (#10), GPT-5.3 Chat: 42.6 (#115)
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1373 | 1396 |
| Fiction.LiveBench | 83.3% | — |
Writing & Preference GPT-5.3 Chat leads
Claude 3.7 Sonnet: 54.6 (#145), GPT-5.3 Chat: 63.3 (#65)
| Benchmark | Claude 3.7 Sonnet | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1314 | 1389 |
| LMArena Creative Writing | 1332 | 1356 |
| EQ-Bench Creative Writing | 1412 | 1690 |
| LMArena Multi-Turn | 1339 | 1413 |
| Short-Story Creative Writing | 81.1% | — |
| WildBench | 81.4% | — |
| LiveBench Language | 59.9% | — |
Frequently asked questions
Is Claude 3.7 Sonnet better than GPT-5.3 Chat?
GPT-5.3 Chat is the stronger model overall, scoring 42.1 to 39.4 on the Noometry Index.
Is Claude 3.7 Sonnet or GPT-5.3 Chat better for coding?
They score almost the same on coding (41.1 vs 40.8); test both on your own repository before choosing.
How many benchmarks do Claude 3.7 Sonnet and GPT-5.3 Chat share?
18 benchmarks have published results for both models. Claude 3.7 Sonnet has 58 scored results on Noometry and GPT-5.3 Chat has 18.