# Claude 3 Sonnet vs Mercury 2.5

> Claude 3 Sonnet has enough public results to be ranked (#311); Mercury 2.5 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/claude-3-sonnet-vs-mercury-2-5
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Mercury 2.5 leads 22.4 to 10.0.

## Snapshot

| | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| Provider | Anthropic | Inception |
| Noometry Index | 28.8 | 30.2 |
| Rank | 311 | — |
| Context | — | 260K |
| Input $/M | — | $0.04 |
| Output $/M | — | $0.15 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3 Sonnet: 29.2 (#296)
- Mercury 2.5: —

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| WeirdML | 10.2% | — |
| BigCodeBench Instruct | 42.7% | — |
| LMArena Coding | 1223 | — |
| BigCodeBench Complete | 53.8% | — |
| ALE-Bench | — | 301.65 |
| HumanEval+ | 64% | — |
| MBPP+ | 69.3% | — |

## Reasoning

- Claude 3 Sonnet: 19.7 (#232)
- Mercury 2.5: —

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| LMArena Hard Prompts | 1197 | — |
| DTBench | 53.6% | — |
| Epoch Capabilities Index | 120.69 | — |
| WinoGrande | 75.1% | — |

## Math

- Claude 3 Sonnet: 10.0 (#305)
- Mercury 2.5: 22.4

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | — |
| ProofBench | — | 3% |
| LMArena Math | 1213 | — |
| MATH Level 5 | 18.2% | — |

## Knowledge

- Claude 3 Sonnet: 21.1 (#271)
- Mercury 2.5: —

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| GPQA Diamond | 40.6% | — |
| LMArena Expert | 1173 | — |
| MMLU | 75.9% | — |

## Multimodal

- Claude 3 Sonnet: 24.7 (#120)
- Mercury 2.5: —

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| LMArena Vision | 984 | — |

## Multilingual

- Claude 3 Sonnet: 38.0 (#229)
- Mercury 2.5: —

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1205 | — |
| LMArena Chinese | 1188 | — |
| LMArena French | 1228 | — |
| LMArena German | 1204 | — |
| LMArena Japanese | 1131 | — |
| LMArena Korean | 1128 | — |
| LMArena Russian | 1227 | — |
| LMArena Spanish | 1204 | — |

## Instruction Following

- Claude 3 Sonnet: 63.1 (#230)
- Mercury 2.5: —

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| LMArena Instruction Following | 1200 | — |

## Long Context

- Claude 3 Sonnet: 36.7 (#223)
- Mercury 2.5: —

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| LMArena Longer Query | 1211 | — |

## Writing & Preference

- Claude 3 Sonnet: 42.3 (#233)
- Mercury 2.5: —

| Benchmark | Claude 3 Sonnet | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1218 | — |
| LMArena Creative Writing | 1186 | — |
| LMArena Multi-Turn | 1227 | — |

## FAQ

### Is Claude 3 Sonnet better than Mercury 2.5?

Claude 3 Sonnet has enough public results to be ranked (#311); Mercury 2.5 does not yet, so treat this comparison as directional.

### How many benchmarks do Claude 3 Sonnet and Mercury 2.5 share?

0 benchmarks have published results for both models. Claude 3 Sonnet has 30 scored results on Noometry and Mercury 2.5 has 2.