# GPT-4.5 vs Mistral Medium 3.5

> Mistral Medium 3.5 is the stronger model overall, scoring 39.6 to 36.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-4-5-vs-mistral-medium-3-5
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GPT-4.5 scores higher in 2 categories and Mistral Medium 3.5 in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Mistral Medium 3.5 leads 39.3 to 32.4.
- Mistral Medium 3.5 has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 36.9 | 39.6 |
| Rank | 200 | 151 |
| Context | — | 262K |
| Input $/M | — | $1.50 |
| Output $/M | — | $7.50 |
| Weights | Proprietary | Open |

## Coding

- GPT-4.5: 41.8 (#102)
- Mistral Medium 3.5: 35.7 (#208)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Coding | 1397 | 1461 |
| Aider Polyglot | 44.9% | — |
| LMArena WebDev | — | 1263 |
| WeirdML | 39.4% | — |
| LiveBench Coding | 75.2% | — |

## Agentic & Tool Use

- GPT-4.5: 27.6 (#92)
- Mistral Medium 3.5: —

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| Cybench | 17.5% | — |

## Reasoning

- GPT-4.5: 14.1 (#320)
- Mistral Medium 3.5: 16.6 (#290)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Hard Prompts | 1404 | 1436 |
| Epoch Capabilities Index | 136.74 | 141.42 |
| ARC-AGI-2 | 0.8% | — |
| SimpleBench | 34.5% | — |
| Kagi LLM Benchmark | — | 41.4% |
| NYT Connections (extended) | — | 12.9% |
| ARC-AGI-1 | 10.3% | — |
| EnigmaEval | 3.2% | — |
| LiveBench Reasoning | 71.1% | — |
| LiveBench Data Analysis | 64.3% | — |
| ForecastBench | 61.7 | — |
| LiveBench | 69% | — |

## Math

- GPT-4.5: 31.0 (#200)
- Mistral Medium 3.5: 36.4 (#113)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Math | 1412 | 1432 |
| OTIS Mock AIME 2024-2025 | 37.8% | — |
| LiveBench Math | 69.3% | — |
| MATH Level 5 | 78.6% | — |

## Knowledge

- GPT-4.5: 32.4 (#205)
- Mistral Medium 3.5: 39.3 (#123)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Expert | 1394 | 1431 |
| GPQA Diamond | 68.7% | — |
| Humanity's Last Exam | 5.4% | — |
| Confabulations | 13.6% | — |

## Multimodal

- GPT-4.5: 37.0 (#68)
- Mistral Medium 3.5: 37.6 (#64)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Vision | 1195 | 1222 |
| VPCT | 45% | — |

## Multilingual

- GPT-4.5: 52.7 (#78)
- Mistral Medium 3.5: 52.1 (#93)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Non-English | 1413 | 1405 |
| LMArena Chinese | 1421 | 1443 |
| LMArena French | 1417 | 1448 |
| LMArena German | 1457 | 1453 |
| LMArena Korean | 1392 | 1387 |
| LMArena Russian | 1419 | 1396 |
| LMArena Japanese | 1416 | — |
| LMArena Spanish | — | 1406 |

## Instruction Following

- GPT-4.5: 72.8 (#129)
- Mistral Medium 3.5: 74.7 (#87)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Instruction Following | 1404 | 1414 |
| LiveBench Instruction Following | 72.3% | — |

## Long Context

- GPT-4.5: 40.4 (#150)
- Mistral Medium 3.5: 43.2 (#101)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Longer Query | 1406 | 1414 |
| Fiction.LiveBench | 63.9% | — |

## Writing & Preference

- GPT-4.5: 57.1 (#129)
- Mistral Medium 3.5: 58.6 (#113)

| Benchmark | GPT-4.5 | Mistral Medium 3.5 |
|---|---|---|
| LMArena Text | 1417 | 1421 |
| LMArena Creative Writing | 1394 | 1372 |
| LMArena Multi-Turn | 1444 | 1423 |
| Short-Story Creative Writing | 75.6% | — |
| EQ-Bench Creative Writing | 1258 | — |
| EQ-Bench 4 | — | 993 |
| LiveBench Language | 61.5% | — |

## FAQ

### Is GPT-4.5 better than Mistral Medium 3.5?

Mistral Medium 3.5 is the stronger model overall, scoring 39.6 to 36.9 on the Noometry Index.

### Is GPT-4.5 or Mistral Medium 3.5 better for coding?

GPT-4.5 scores higher on coding benchmarks: 41.8 versus 35.7 in the Noometry coding category.

### How many benchmarks do GPT-4.5 and Mistral Medium 3.5 share?

17 benchmarks have published results for both models. GPT-4.5 has 42 scored results on Noometry and Mistral Medium 3.5 has 22.