# Claude 3 Opus vs Claude Sonnet 5

> Claude Sonnet 5 is the stronger model overall, scoring 54.6 to 29.5 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-opus-vs-claude-sonnet-5
- Last updated: 2026-10-10
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. Claude 3 Opus scores higher in 0 categories and Claude Sonnet 5 in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5 leads 66.2 to 14.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 4.7% for Claude 3 Opus and 94.7% for Claude Sonnet 5.

## Snapshot

| | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 29.5 | 54.6 |
| Rank | 310 | 29 |
| Context | — | 1M |
| Input $/M | — | $2 |
| Output $/M | — | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3 Opus: 32.9 (#267)
- Claude Sonnet 5: 55.5 (#26)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| WeirdML | 19.2% | 68.8% |
| LMArena Coding | 1264 | 1483 |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.7% |
| CursorBench | — | 34.1% |
| LMArena WebDev | — | 1541 |
| SciCode | — | 54.3% |
| GSO | — | 37.3% |
| BigCodeBench Instruct | 45.5% | — |
| LiveBench Coding | 38.6% | — |
| BigCodeBench Complete | 57.4% | — |
| ALE-Bench | — | 1,463 |
| HumanEval+ | 77.4% | — |
| MBPP+ | 73.3% | — |

## Agentic & Tool Use

- Claude 3 Opus: 24.6 (#116)
- Claude Sonnet 5: 42.8 (#18)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| APEX-Agents | — | 54.5% |
| Cybench | 10% | — |
| GBAEval | — | 65.3% |
| LMArena Search | — | 1194 |
| METR Time Horizons | 29.5% | — |
| Vending-Bench 2 | — | 6,378 |

## Reasoning

- Claude 3 Opus: 14.6 (#324)
- Claude Sonnet 5: 49.1 (#39)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| SimpleBench | 23.5% | 60.6% |
| Chess Puzzles | 5% | 35% |
| LMArena Hard Prompts | 1245 | 1461 |
| DTBench | 61.6% | 92.5% |
| LMCA | 17% | 50% |
| Epoch Capabilities Index | 126.91 | 156.21 |
| ForecastBench | 58.4 | 61.1 |
| NYT Connections (extended) | — | 75.1% |
| CritPt | — | 16.9% |
| EnigmaEval | 0.8% | — |
| LiveBench Reasoning | 40.6% | — |
| Mystery Game Puzzles | — | 35% |
| LiveBench Data Analysis | 57.9% | — |
| Surface Evolver Bench | — | 60% |
| Bench to the Future 3 | — | 0.14 |
| LiveBench | 49.2% | — |
| WinoGrande | 88.5% | — |

## Math

- Claude 3 Opus: 14.8 (#299)
- Claude Sonnet 5: 66.2 (#27)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.7% | 94.7% |
| LMArena Math | 1273 | 1467 |
| FrontierMath (Tiers 1-3) | — | 65.6% |
| FrontierMath Tier 4 | — | 29.3% |
| ProofBench | — | 77% |
| LiveBench Math | 43.6% | — |
| MATH Level 5 | 37.5% | — |

## Knowledge

- Claude 3 Opus: 24.5 (#267)
- Claude Sonnet 5: 55.6 (#47)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| GPQA Diamond | 47.2% | 90.5% |
| SimpleQA Verified | 12.6% | 33.7% |
| LMArena Expert | 1223 | 1490 |
| Confabulations | 22.7% | — |
| MMLU | 84.6% | — |

## Multimodal

- Claude 3 Opus: 27.1 (#116)
- Claude Sonnet 5: 42.4 (#31)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| LMArena Vision | 1023 | 1274 |
| Blueprint-Bench 2 | — | 24.9% |
| LMArena Document | — | 1466 |

## Multilingual

- Claude 3 Opus: 41.4 (#207)
- Claude Sonnet 5: 53.8 (#55)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| LMArena Non-English | 1258 | 1431 |
| LMArena Chinese | 1248 | 1477 |
| LMArena French | 1275 | 1460 |
| LMArena German | 1258 | 1440 |
| LMArena Japanese | 1204 | 1422 |
| LMArena Korean | 1187 | 1411 |
| LMArena Russian | 1280 | 1451 |
| LMArena Spanish | 1246 | 1437 |

## Instruction Following

- Claude 3 Opus: 64.1 (#228)
- Claude Sonnet 5: 76.3 (#41)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| LMArena Instruction Following | 1248 | 1452 |
| LiveBench Instruction Following | 63.9% | — |

## Long Context

- Claude 3 Opus: 38.2 (#202)
- Claude Sonnet 5: 44.8 (#55)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| LMArena Longer Query | 1259 | 1463 |

## Writing & Preference

- Claude 3 Opus: 47.2 (#213)
- Claude Sonnet 5: 69.2 (#25)

| Benchmark | Claude 3 Opus | Claude Sonnet 5 |
|---|---|---|
| LMArena Text | 1262 | 1442 |
| LMArena Creative Writing | 1235 | 1416 |
| LMArena Multi-Turn | 1275 | 1454 |
| EQ-Bench Creative Writing | — | 1794 |
| EQ-Bench 4 | — | 1236 |
| LiveBench Language | 50.4% | — |

## FAQ

### Is Claude 3 Opus better than Claude Sonnet 5?

Claude Sonnet 5 is the stronger model overall, scoring 54.6 to 29.5 on the Noometry Index.

### Is Claude 3 Opus or Claude Sonnet 5 better for coding?

Claude Sonnet 5 scores higher on coding benchmarks: 55.5 versus 32.9 in the Noometry coding category.

### How many benchmarks do Claude 3 Opus and Claude Sonnet 5 share?

28 benchmarks have published results for both models. Claude 3 Opus has 46 scored results on Noometry and Claude Sonnet 5 has 51.