# Claude 3.5 Sonnet vs Claude 3 Opus

> Claude 3.5 Sonnet is the stronger model overall, scoring 34.4 to 29.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-5-sonnet-vs-claude-3-opus
- Last updated: 2026-10-10
- Shared benchmarks: 42

## Summary

- They share 42 benchmarks with published results for both. Claude 3.5 Sonnet scores higher in 9 categories and Claude 3 Opus in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude 3.5 Sonnet leads 22.5 to 14.2.
- The biggest single-benchmark swing is LiveBench Coding: 67.1% for Claude 3.5 Sonnet and 38.6% for Claude 3 Opus.

## Snapshot

| | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 34.4 | 29.3 |
| Rank | 225 | 300 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3.5 Sonnet: 39.5 (#145)
- Claude 3 Opus: 32.4 (#261)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| WeirdML | 40% | 19.2% |
| BigCodeBench Instruct | 46.8% | 45.5% |
| LiveBench Coding | 67.1% | 38.6% |
| LMArena Coding | 1343 | 1264 |
| BigCodeBench Complete | 58.6% | 57.4% |
| HumanEval+ | 81.7% | 77.4% |
| MBPP+ | 74.3% | 73.3% |
| Aider Polyglot | 51.6% | — |
| GSO | 4.6% | — |
| CadEval | 48% | — |

## Agentic & Tool Use

- Claude 3.5 Sonnet: 32.1 (#61)
- Claude 3 Opus: 24.3 (#110)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| Cybench | 17.5% | 10% |
| METR Time Horizons | 45.2% | 29.5% |
| TheAgentCompany | 24% | — |
| BALROG | 32.6% | — |

## Reasoning

- Claude 3.5 Sonnet: 22.5 (#176)
- Claude 3 Opus: 14.2 (#318)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| SimpleBench | 41.4% | 23.5% |
| EnigmaEval | 0.9% | 0.8% |
| LiveBench Reasoning | 56.7% | 40.6% |
| LMArena Hard Prompts | 1305 | 1246 |
| DTBench | 67.8% | 61.6% |
| LiveBench Data Analysis | 55% | 57.9% |
| Epoch Capabilities Index | 133.55 | 126.91 |
| ForecastBench | 60.7 | 58.4 |
| LiveBench | 59% | 49.2% |
| Chess Puzzles | — | 5% |
| LMCA | — | 17% |
| WinoGrande | — | 88.5% |

## Math

- Claude 3.5 Sonnet: 18.0 (#282)
- Claude 3 Opus: 13.9 (#293)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 8.5% | 4.7% |
| LiveBench Math | 52.3% | 43.6% |
| LMArena Math | 1306 | 1273 |
| MATH Level 5 | 56.9% | 37.5% |
| Omni-MATH | 27.6% | — |
| FrontierMath (Feb 2025 set) | 2.1% | — |
| FrontierMath Tier 4 (v1) | 0% | — |

## Knowledge

- Claude 3.5 Sonnet: 28.5 (#236)
- Claude 3 Opus: 24.5 (#262)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| GPQA Diamond | 55.3% | 47.2% |
| Confabulations | 19.9% | 22.7% |
| LMArena Expert | 1264 | 1223 |
| MMLU | 87.3% | 84.6% |
| Humanity's Last Exam | 4.1% | — |
| SimpleQA Verified | — | 12.6% |
| MMLU-Pro | 77.7% | — |
| GPQA (HELM) | 56.5% | — |

## Multimodal

- Claude 3.5 Sonnet: 26.0 (#115)
- Claude 3 Opus: 26.6 (#112)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| LMArena Vision | 1125 | 1023 |
| Video-MME | 60% | — |
| GeoBench | 62% | — |
| VPCT | 33% | — |

## Multilingual

- Claude 3.5 Sonnet: 43.4 (#180)
- Claude 3 Opus: 41.6 (#202)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| LMArena Non-English | 1283 | 1258 |
| LMArena Chinese | 1271 | 1248 |
| LMArena French | 1304 | 1274 |
| LMArena German | 1297 | 1258 |
| LMArena Japanese | 1234 | 1204 |
| LMArena Korean | 1200 | 1187 |
| LMArena Russian | 1305 | 1280 |
| LMArena Spanish | 1289 | 1246 |

## Instruction Following

- Claude 3.5 Sonnet: 69.0 (#177)
- Claude 3 Opus: 64.3 (#223)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| LiveBench Instruction Following | 69.3% | 63.9% |
| LMArena Instruction Following | 1297 | 1248 |
| IFEval | 85.5% | — |

## Long Context

- Claude 3.5 Sonnet: 39.9 (#162)
- Claude 3 Opus: 38.2 (#197)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| LMArena Longer Query | 1311 | 1259 |

## Writing & Preference

- Claude 3.5 Sonnet: 53.0 (#159)
- Claude 3 Opus: 47.4 (#208)

| Benchmark | Claude 3.5 Sonnet | Claude 3 Opus |
|---|---|---|
| LMArena Text | 1298 | 1262 |
| LMArena Creative Writing | 1292 | 1235 |
| LMArena Multi-Turn | 1326 | 1275 |
| LiveBench Language | 53.8% | 50.4% |
| Short-Story Creative Writing | 80.3% | — |
| EQ-Bench Creative Writing | 1451 | — |
| WildBench | 79.2% | — |

## FAQ

### Is Claude 3.5 Sonnet better than Claude 3 Opus?

Claude 3.5 Sonnet is the stronger model overall, scoring 34.4 to 29.3 on the Noometry Index.

### Is Claude 3.5 Sonnet or Claude 3 Opus better for coding?

Claude 3.5 Sonnet scores higher on coding benchmarks: 39.5 versus 32.4 in the Noometry coding category.

### How many benchmarks do Claude 3.5 Sonnet and Claude 3 Opus share?

42 benchmarks have published results for both models. Claude 3.5 Sonnet has 60 scored results on Noometry and Claude 3 Opus has 46.