Model comparison
Claude 3.5 Sonnet vs GPT-5.1
GPT-5.1 is the stronger model overall, scoring 49.0 to 34.6 on the Noometry Index.
Last verified . 43 shared benchmarks.
Summary
- They share 43 benchmarks with published results for both. Claude 3.5 Sonnet scores higher in 0 categories and GPT-5.1 in 10 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.1 leads 52.2 to 19.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 8.5% for Claude 3.5 Sonnet and 88.6% for GPT-5.1.
Side by side
| Claude 3.5 Sonnet | GPT-5.1 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 34.6 | 49.0 |
| Released | 2024-06-20 | 2025-11-13 |
| Weights | Proprietary | Proprietary |
| Context window | — | 400K |
| Max output | — | 128K |
| Input $ / M tokens | — | $1.25 |
| Output $ / M tokens | — | $10 |
| Results tracked | 60 | 63 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-5.1 leads
Claude 3.5 Sonnet: 39.0 (#165), GPT-5.1: 46.4 (#66)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| GSO | 4.6% | 13.7% |
| WeirdML | 40% | 60.8% |
| LiveBench Coding | 67.1% | 72.5% |
| LMArena Coding | 1342 | 1454 |
| SWE-bench Verified | — | 68% |
| SWE-bench Verified (bash only) | — | 66% |
| Aider Polyglot | 51.6% | — |
| LMArena WebDev | — | 1395 |
| SciCode | — | 43.3% |
| BigCodeBench Instruct | 46.8% | — |
| BigCodeBench Complete | 58.6% | — |
| CadEval | 48% | — |
| ALE-Bench | — | 1,192 |
| HumanEval+ | 81.7% | — |
| MBPP+ | 74.3% | — |
Agentic & Tool Use Too close to call
Claude 3.5 Sonnet: 32.3 (#67), GPT-5.1: 32.7 (#60)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| Terminal-Bench | — | 47.6% |
| TheAgentCompany | 24% | — |
| Cybench | 17.5% | — |
| DeepResearch Bench | — | 42.8% |
| BALROG | 32.6% | — |
| LMArena Search | — | 1199 |
| METR Time Horizons | 45.2% | — |
| Vending-Bench 2 | — | 1,473 |
Reasoning GPT-5.1 leads
Claude 3.5 Sonnet: 23.1 (#183), GPT-5.1: 39.8 (#58)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| SimpleBench | 41.4% | 53.2% |
| EnigmaEval | 0.9% | 11.2% |
| LiveBench Reasoning | 56.7% | 95.8% |
| LMArena Hard Prompts | 1305 | 1457 |
| DTBench | 67.8% | 90.1% |
| LiveBench Data Analysis | 55% | 72.1% |
| Epoch Capabilities Index | 133.55 | 149.64 |
| ForecastBench | 60.7 | 58.1 |
| LiveBench | 59% | 78.8% |
| ARC-AGI-2 | — | 17.6% |
| ARC-AGI-1 | — | 72.8% |
| CritPt | — | 4.9% |
| Chess Puzzles | — | 32% |
| Mystery Game Puzzles | — | 19% |
| LMCA | — | 43.9% |
Math GPT-5.1 leads
Claude 3.5 Sonnet: 19.2 (#288), GPT-5.1: 52.2 (#51)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 8.5% | 88.6% |
| Omni-MATH | 27.6% | 46.4% |
| LiveBench Math | 52.3% | 94.5% |
| LMArena Math | 1307 | 1447 |
| FrontierMath (Feb 2025 set) | 2.1% | 31% |
| FrontierMath Tier 4 (v1) | 0% | 12.5% |
| MATH Level 5 | 56.9% | — |
Knowledge GPT-5.1 leads
Claude 3.5 Sonnet: 28.6 (#245), GPT-5.1: 50.6 (#71)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| GPQA Diamond | 55.3% | 87.6% |
| Humanity's Last Exam | 4.1% | 23.7% |
| MMLU-Pro | 77.7% | 57.9% |
| GPQA (HELM) | 56.5% | 44.2% |
| LMArena Expert | 1265 | 1470 |
| SimpleQA Verified | — | 48% |
| Confabulations | 19.9% | — |
| Vectara Hallucination Rate | — | 10.9% |
| MMLU | 87.3% | — |
Multimodal GPT-5.1 leads
Claude 3.5 Sonnet: 26.5 (#120), GPT-5.1: 44.8 (#19)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Vision | 1125 | 1250 |
| VPCT | 33% | 58.7% |
| Video-MME | 60% | — |
| GeoBench | 62% | — |
| LMArena Document | — | 1403 |
Multilingual GPT-5.1 leads
Claude 3.5 Sonnet: 43.2 (#185), GPT-5.1: 53.8 (#56)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Non-English | 1283 | 1431 |
| LMArena Chinese | 1272 | 1495 |
| LMArena French | 1305 | 1450 |
| LMArena German | 1297 | 1438 |
| LMArena Japanese | 1234 | 1453 |
| LMArena Korean | 1200 | 1401 |
| LMArena Russian | 1306 | 1435 |
| LMArena Spanish | 1290 | 1433 |
Instruction Following GPT-5.1 leads
Claude 3.5 Sonnet: 68.8 (#182), GPT-5.1: 83.9 (#1)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| LiveBench Instruction Following | 69.3% | 93.3% |
| IFEval | 85.5% | 93.5% |
| LMArena Instruction Following | 1297 | 1443 |
Long Context GPT-5.1 leads
Claude 3.5 Sonnet: 39.9 (#167), GPT-5.1: 47.6 (#14)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Longer Query | 1311 | 1447 |
| CL-bench | — | 23.7% |
| CL-bench Life | — | 17.3% |
Writing & Preference GPT-5.1 leads
Claude 3.5 Sonnet: 52.9 (#164), GPT-5.1: 64.5 (#55)
| Benchmark | Claude 3.5 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Text | 1298 | 1443 |
| LMArena Creative Writing | 1292 | 1427 |
| WildBench | 79.2% | 86.3% |
| LMArena Multi-Turn | 1326 | 1450 |
| LiveBench Language | 53.8% | 80.2% |
| Short-Story Creative Writing | 80.3% | — |
| EQ-Bench Creative Writing | 1451 | — |
Frequently asked questions
Is Claude 3.5 Sonnet better than GPT-5.1?
GPT-5.1 is the stronger model overall, scoring 49.0 to 34.6 on the Noometry Index.
Is Claude 3.5 Sonnet or GPT-5.1 better for coding?
GPT-5.1 scores higher on coding benchmarks: 46.4 versus 39.0 in the Noometry coding category.
How many benchmarks do Claude 3.5 Sonnet and GPT-5.1 share?
43 benchmarks have published results for both models. Claude 3.5 Sonnet has 60 scored results on Noometry and GPT-5.1 has 63.