# Claude Sonnet 4.5 vs Mistral Medium

> Claude Sonnet 4.5 is the stronger model overall, scoring 44.1 to 36.3 on the Noometry Index. Mistral Medium costs 2.0× less per token, which makes it the better buy when Claude Sonnet 4.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-sonnet-4-5-vs-mistral-medium
- Last updated: 2026-10-11
- Shared benchmarks: 32

## Summary

- They share 32 benchmarks with published results for both. Claude Sonnet 4.5 scores higher in 9 categories and Mistral Medium in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Sonnet 4.5 leads 48.4 to 25.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 77.8% for Claude Sonnet 4.5 and 32.2% for Mistral Medium.
- Mistral Medium is cheaper at $1.50 / $7.50 per million input/output tokens, against $3 / $15 for Claude Sonnet 4.5.
- Mistral Medium accepts more context: 262K tokens versus 200K.
- Mistral Medium has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 44.1 | 36.3 |
| Rank | 81 | 218 |
| Context | 200K | 262K |
| Input $/M | $3 | $1.50 |
| Output $/M | $15 | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Claude Sonnet 4.5: 47.3 (#61)
- Mistral Medium: 34.2 (#243)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| SciCode | 44.7% | 40.2% |
| WeirdML | 47.7% | 43.7% |
| LMArena Coding | 1489 | 1434 |
| ALE-Bench | 796.15 | 763.98 |
| SWE-bench Verified | 71.3% | — |
| FrontierCode | — | 8% |
| SWE-bench Verified (bash only) | 71.4% | — |
| LMArena WebDev | 1393 | — |
| SWE-bench Multilingual | 67% | — |
| GSO | 14.7% | — |
| AlgoTune | 1.52 | — |

## Agentic & Tool Use

- Claude Sonnet 4.5: 38.3 (#32)
- Mistral Medium: 28.3 (#90)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| Berkeley Function Calling Leaderboard | 73.2% | 37.7% |
| Terminal-Bench | 46.5% | — |
| GDPval | 42.5% | — |
| Remote Labor Index | 2.1% | — |
| τ²-bench Airline | 72% | — |
| τ²-bench Banking | 25.3% | — |
| τ²-bench Retail | 72.4% | — |
| τ²-bench Telecom | 84.9% | — |
| Cybench | 60% | — |
| DeepResearch Bench | 52.6% | — |
| OSWorld | 62.9% | — |
| LMArena Search | 1159 | — |
| METR Time Horizons | 67.4% | — |
| Vending-Bench 2 | 3,839 | — |

## Reasoning

- Claude Sonnet 4.5: 26.9 (#125)
- Mistral Medium: 24.0 (#167)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| Kagi LLM Benchmark | 57.9% | 50% |
| CritPt | 1.1% | 0% |
| LMArena Hard Prompts | 1462 | 1426 |
| DTBench | 83.2% | 75.5% |
| LMCA | 38.8% | 26.1% |
| ARC-AGI-2 | 13.6% | — |
| SimpleBench | 54.3% | — |
| NYT Connections (extended) | 37.3% | — |
| ARC-AGI-1 | 63.7% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 6% | — |
| EBR-Bench | 2.4% | — |
| Mystery Game Puzzles | 17% | — |
| Surface Evolver Bench | — | 26.9% |
| Epoch Capabilities Index | 146.84 | — |
| ForecastBench | 61.9 | — |

## Math

- Claude Sonnet 4.5: 32.3 (#216)
- Mistral Medium: 28.1 (#245)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 77.8% | 32.2% |
| ProofBench | 19% | 9% |
| LMArena Math | 1449 | 1408 |
| MATH Level 5 | 97.7% | 81.6% |
| FrontierMath (Feb 2025 set) | 15.2% | 0.3% |
| FrontierMath (Tiers 1-3) | 23.9% | — |
| FrontierMath Tier 4 | 2.4% | — |
| Omni-MATH | 55.3% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Sonnet 4.5: 48.4 (#76)
- Mistral Medium: 25.0 (#265)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| GPQA Diamond | 82.3% | 59.5% |
| Humanity's Last Exam | 13.7% | 4.5% |
| Vectara Hallucination Rate | 12% | 22.7% |
| LMArena Expert | 1482 | 1408 |
| SimpleQA Verified | 30.7% | — |
| MMLU-Pro | 86.9% | — |
| GPQA (HELM) | 68.6% | — |

## Multimodal

- Claude Sonnet 4.5: 34.8 (#89)
- Mistral Medium: 35.3 (#88)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| LMArena Vision | — | 1172 |
| VPCT | 39.8% | — |
| LMArena Document | 1450 | — |

## Multilingual

- Claude Sonnet 4.5: 53.4 (#69)
- Mistral Medium: 52.1 (#91)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| LMArena Non-English | 1425 | 1408 |
| LMArena Chinese | 1459 | 1447 |
| LMArena French | 1458 | 1459 |
| LMArena German | 1427 | 1432 |
| LMArena Japanese | 1390 | 1378 |
| LMArena Korean | 1403 | 1380 |
| LMArena Russian | 1437 | 1411 |
| LMArena Spanish | 1457 | 1433 |

## Instruction Following

- Claude Sonnet 4.5: 75.0 (#78)
- Mistral Medium: 73.7 (#116)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| LMArena Instruction Following | 1459 | 1398 |
| IFEval | 85% | — |

## Long Context

- Claude Sonnet 4.5: 45.2 (#46)
- Mistral Medium: 42.9 (#114)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| LMArena Longer Query | 1476 | 1406 |

## Writing & Preference

- Claude Sonnet 4.5: 66.5 (#34)
- Mistral Medium: 60.0 (#103)

| Benchmark | Claude Sonnet 4.5 | Mistral Medium |
|---|---|---|
| LMArena Text | 1439 | 1424 |
| LMArena Creative Writing | 1442 | 1391 |
| LMArena Multi-Turn | 1465 | 1418 |
| Short-Story Creative Writing | — | 77.3% |
| EQ-Bench Creative Writing | 1678 | — |
| WildBench | 85.4% | — |

## FAQ

### Is Claude Sonnet 4.5 better than Mistral Medium?

Claude Sonnet 4.5 is the stronger model overall, scoring 44.1 to 36.3 on the Noometry Index. Mistral Medium costs 2.0× less per token, which makes it the better buy when Claude Sonnet 4.5's lead doesn't matter for your workload.

### Which is cheaper, Claude Sonnet 4.5 or Mistral Medium?

Mistral Medium is cheaper. It lists at $1.50 per million input tokens and $7.50 per million output tokens; Claude Sonnet 4.5 lists at $3 and $15.

### Is Claude Sonnet 4.5 or Mistral Medium better for coding?

Claude Sonnet 4.5 scores higher on coding benchmarks: 47.3 versus 34.2 in the Noometry coding category.

### Which has the bigger context window?

Mistral Medium does, with 262K tokens against 200K.

### How many benchmarks do Claude Sonnet 4.5 and Mistral Medium share?

32 benchmarks have published results for both models. Claude Sonnet 4.5 has 73 scored results on Noometry and Mistral Medium has 36.