# Claude 3 Sonnet vs Claude Opus 5

> Claude Opus 5 is the stronger model overall, scoring 67.8 to 29.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-claude-opus-5
- 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 Claude Opus 5 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 5 leads 86.2 to 10.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 3 Sonnet and 98.9% for Claude Opus 5.

## Snapshot

| | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 29.0 | 67.8 |
| Rank | 319 | 4 |
| Context | — | 1M |
| Input $/M | — | $5 |
| Output $/M | — | $25 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3 Sonnet: 29.6 (#302)
- Claude Opus 5: 67.5 (#5)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| WeirdML | 10.2% | 91.8% |
| LMArena Coding | 1223 | 1534 |
| DeepSWE | — | 73.6% |
| FrontierCode | — | 53.4% |
| CursorBench | — | 46.6% |
| LMArena WebDev | — | 1691 |
| FrontierSWE | — | 52% |
| SciCode | — | 56.4% |
| BigCodeBench Instruct | 42.7% | — |
| BigCodeBench Complete | 53.8% | — |
| ALE-Bench | — | 2,165 |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Agentic & Tool Use

- Claude 3 Sonnet: —
- Claude Opus 5: 55.6 (#1)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| APEX-Agents | — | 65.8% |
| OSWorld 2.0 | — | 31.4% |
| τ²-bench Banking | — | 48.7% |
| PostTrainBench | — | 35% |
| BALROG | — | 63.4% |
| GBAEval | — | 79.6% |
| GDP.pdf | — | 24% |
| Vending-Bench 2 | — | 11,182 |

## Reasoning

- Claude 3 Sonnet: 20.5 (#237)
- Claude Opus 5: 77.2 (#4)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| LMArena Hard Prompts | 1197 | 1526 |
| DTBench | 53.6% | 97.9% |
| Epoch Capabilities Index | 120.7 | 162.78 |
| ARC-AGI-2 | — | 90.4% |
| SimpleBench | — | 80.6% |
| NYT Connections (extended) | — | 94.3% |
| ARC-AGI-1 | — | 97.5% |
| CritPt | — | 29.1% |
| Chess Puzzles | — | 42% |
| EBR-Bench | — | 45.7% |
| Mystery Game Puzzles | — | 59% |
| LMCA | — | 64.5% |
| Bench to the Future 3 | — | 0.12 |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.7 (#310)
- Claude Opus 5: 86.2 (#8)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 98.9% |
| LMArena Math | 1213 | 1531 |
| FrontierMath (Tiers 1-3) | — | 85.6% |
| FrontierMath Tier 4 | — | 73.2% |
| ProofBench | — | 99% |
| MATH Level 5 | 18.2% | — |

## Knowledge

- Claude 3 Sonnet: 21.1 (#276)
- Claude Opus 5: 66.8 (#9)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| GPQA Diamond | 40.6% | 93.9% |
| LMArena Expert | 1173 | 1557 |
| SimpleQA Verified | — | 59.9% |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 25.2 (#125)
- Claude Opus 5: 50.8 (#8)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| LMArena Vision | 984 | 1319 |
| Blueprint-Bench 2 | — | 30.4% |
| Furniture Assembly | — | 60.8% |
| LMArena Document | — | 1516 |

## Multilingual

- Claude 3 Sonnet: 37.8 (#234)
- Claude Opus 5: 58.8 (#4)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| LMArena Non-English | 1205 | 1501 |
| LMArena Chinese | 1189 | 1574 |
| LMArena French | 1229 | 1519 |
| LMArena German | 1204 | 1524 |
| LMArena Japanese | 1131 | 1516 |
| LMArena Korean | 1128 | 1521 |
| LMArena Russian | 1227 | 1507 |
| LMArena Spanish | 1204 | 1519 |

## Instruction Following

- Claude 3 Sonnet: 62.8 (#235)
- Claude Opus 5: 79.2 (#7)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| LMArena Instruction Following | 1199 | 1517 |

## Long Context

- Claude 3 Sonnet: 36.7 (#228)
- Claude Opus 5: 46.5 (#21)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| LMArena Longer Query | 1211 | 1515 |

## Writing & Preference

- Claude 3 Sonnet: 42.1 (#238)
- Claude Opus 5: 79.2 (#1)

| Benchmark | Claude 3 Sonnet | Claude Opus 5 |
|---|---|---|
| LMArena Text | 1218 | 1507 |
| LMArena Creative Writing | 1186 | 1491 |
| LMArena Multi-Turn | 1227 | 1499 |
| EQ-Bench Creative Writing | — | 2133 |
| EQ-Bench 4 | — | 1385 |

## FAQ

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

Claude Opus 5 is the stronger model overall, scoring 67.8 to 29.0 on the Noometry Index.

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

Claude Opus 5 scores higher on coding benchmarks: 67.5 versus 29.6 in the Noometry coding category.

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

23 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Claude Opus 5 has 57.