# Claude 3 Sonnet vs GPT-5.1

> GPT-5.1 is the stronger model overall, scoring 48.8 to 28.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-gpt-5-1
- Last updated: 2026-10-10
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Claude 3 Sonnet scores higher in 0 categories and GPT-5.1 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.1 leads 50.3 to 10.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 88.6% for GPT-5.1.

## Snapshot

| | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 28.8 | 48.8 |
| Rank | 311 | 47 |
| Context | — | 400K |
| Input $/M | — | $1.25 |
| Output $/M | — | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3 Sonnet: 29.2 (#296)
- GPT-5.1: 46.9 (#59)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| WeirdML | 10.2% | 60.8% |
| LMArena Coding | 1223 | 1454 |
| SWE-bench Verified | — | 68% |
| SWE-bench Verified (bash only) | — | 66% |
| LMArena WebDev | — | 1395 |
| SciCode | — | 43.3% |
| GSO | — | 13.7% |
| BigCodeBench Instruct | 42.7% | — |
| LiveBench Coding | — | 72.5% |
| BigCodeBench Complete | 53.8% | — |
| ALE-Bench | — | 1,192 |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Agentic & Tool Use

- Claude 3 Sonnet: —
- GPT-5.1: 32.5 (#55)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| Terminal-Bench | — | 47.6% |
| DeepResearch Bench | — | 42.8% |
| LMArena Search | — | 1199 |
| Vending-Bench 2 | — | 1,473 |

## Reasoning

- Claude 3 Sonnet: 19.7 (#232)
- GPT-5.1: 39.9 (#50)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1457 |
| DTBench | 53.6% | 90.1% |
| Epoch Capabilities Index | 120.69 | 149.66 |
| ARC-AGI-2 | — | 17.6% |
| SimpleBench | — | 53.2% |
| ARC-AGI-1 | — | 72.8% |
| CritPt | — | 4.9% |
| Chess Puzzles | — | 32% |
| EnigmaEval | — | 11.2% |
| LiveBench Reasoning | — | 95.8% |
| Mystery Game Puzzles | — | 19% |
| LiveBench Data Analysis | — | 72.1% |
| LMCA | — | 43.9% |
| ForecastBench | — | 58.1 |
| LiveBench | — | 78.8% |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.0 (#305)
- GPT-5.1: 50.3 (#45)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 88.6% |
| LMArena Math | 1213 | 1446 |
| Omni-MATH | — | 46.4% |
| LiveBench Math | — | 94.5% |
| MATH Level 5 | 18.2% | — |
| FrontierMath (Feb 2025 set) | — | 31% |
| FrontierMath Tier 4 (v1) | — | 12.5% |

## Knowledge

- Claude 3 Sonnet: 21.1 (#271)
- GPT-5.1: 50.5 (#65)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| GPQA Diamond | 40.6% | 87.6% |
| LMArena Expert | 1173 | 1470 |
| Humanity's Last Exam | — | 23.7% |
| SimpleQA Verified | — | 48% |
| MMLU-Pro | — | 57.9% |
| Vectara Hallucination Rate | — | 10.9% |
| GPQA (HELM) | — | 44.2% |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 24.7 (#120)
- GPT-5.1: 44.0 (#17)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Vision | 984 | 1250 |
| VPCT | — | 58.7% |
| LMArena Document | — | 1403 |

## Multilingual

- Claude 3 Sonnet: 38.0 (#229)
- GPT-5.1: 54.0 (#51)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Non-English | 1205 | 1431 |
| LMArena Chinese | 1188 | 1495 |
| LMArena French | 1228 | 1451 |
| LMArena German | 1204 | 1439 |
| LMArena Japanese | 1131 | 1453 |
| LMArena Korean | 1128 | 1401 |
| LMArena Russian | 1227 | 1435 |
| LMArena Spanish | 1204 | 1430 |

## Instruction Following

- Claude 3 Sonnet: 63.1 (#230)
- GPT-5.1: 84.0 (#1)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Instruction Following | 1200 | 1442 |
| LiveBench Instruction Following | — | 93.3% |
| IFEval | — | 93.5% |

## Long Context

- Claude 3 Sonnet: 36.7 (#223)
- GPT-5.1: 47.6 (#14)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Longer Query | 1211 | 1448 |
| CL-bench | — | 23.7% |
| CL-bench Life | — | 17.3% |

## Writing & Preference

- Claude 3 Sonnet: 42.3 (#233)
- GPT-5.1: 64.7 (#53)

| Benchmark | Claude 3 Sonnet | GPT-5.1 |
|---|---|---|
| LMArena Text | 1218 | 1443 |
| LMArena Creative Writing | 1186 | 1427 |
| LMArena Multi-Turn | 1227 | 1449 |
| WildBench | — | 86.3% |
| LiveBench Language | — | 80.2% |

## FAQ

### Is Claude 3 Sonnet better than GPT-5.1?

GPT-5.1 is the stronger model overall, scoring 48.8 to 28.8 on the Noometry Index.

### Is Claude 3 Sonnet or GPT-5.1 better for coding?

GPT-5.1 scores higher on coding benchmarks: 46.9 versus 29.2 in the Noometry coding category.

### How many benchmarks do Claude 3 Sonnet and GPT-5.1 share?

23 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and GPT-5.1 has 63.