# Mistral Medium 3 vs o3-mini

> o3-mini has enough public results to be ranked (#205); Mistral Medium 3 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/mistral-medium-3-vs-o3-mini
- Last updated: 2026-10-10
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Mistral Medium 3 scores higher in 0 categories and o3-mini in 1 category; one gap is clear of the uncertainty.
- The widest gap is in knowledge, where o3-mini leads 38.3 to 34.1.
- Mistral Medium 3 is cheaper at $0.40 / $2 per million input/output tokens, against $1.10 / $4.40 for o3-mini.
- o3-mini accepts more context: 200K tokens versus 131K.

## Snapshot

| | Mistral Medium 3 | o3-mini |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 36.5 | 36.7 |
| Rank | — | 205 |
| Context | 131K | 200K |
| Input $/M | $0.40 | $1.10 |
| Output $/M | $2 | $4.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Mistral Medium 3: —
- o3-mini: 41.4 (#116)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| Aider Polyglot | — | 60.4% |
| SciCode | — | 39.8% |
| GSO | — | 1.3% |
| WeirdML | — | 43.7% |
| LiveBench Coding | — | 82.7% |
| LMArena Coding | — | 1378 |
| CadEval | — | 54% |

## Agentic & Tool Use

- Mistral Medium 3: —
- o3-mini: 29.3 (#79)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| Cybench | — | 22.5% |

## Reasoning

- Mistral Medium 3: —
- o3-mini: 16.3 (#295)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| Epoch Capabilities Index | 134.07 | 140.35 |
| ARC-AGI-2 | — | 3% |
| SimpleBench | — | 22.8% |
| ARC-AGI-1 | — | 34.5% |
| CritPt | — | 0.3% |
| Chess Puzzles | — | 17% |
| LiveBench Reasoning | — | 89.6% |
| LMArena Hard Prompts | — | 1366 |
| Mystery Game Puzzles | — | 7% |
| DTBench | — | 68.8% |
| LiveBench Data Analysis | — | 70.6% |
| LMCA | — | 19% |
| ForecastBench | — | 59.6 |
| LiveBench | — | 75.9% |

## Math

- Mistral Medium 3: —
- o3-mini: 27.6 (#236)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 18.6% |
| FrontierMath Tier 4 | — | 0% |
| OTIS Mock AIME 2024-2025 | — | 76.9% |
| LiveBench Math | — | 77.3% |
| LMArena Math | — | 1396 |
| MATH Level 5 | — | 96.5% |
| FrontierMath (Feb 2025 set) | — | 12.4% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Mistral Medium 3: 34.1
- o3-mini: 38.3 (#135)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| Confabulations | 21.9% | 17.9% |
| GPQA Diamond | — | 77% |
| SimpleQA Verified | — | 15.3% |
| LMArena Expert | — | 1364 |

## Multilingual

- Mistral Medium 3: —
- o3-mini: 45.9 (#159)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| LMArena Non-English | — | 1319 |
| LMArena Chinese | — | 1379 |
| LMArena French | — | 1333 |
| LMArena German | — | 1303 |
| LMArena Japanese | — | 1286 |
| LMArena Korean | — | 1314 |
| LMArena Russian | — | 1304 |
| LMArena Spanish | — | 1321 |

## Instruction Following

- Mistral Medium 3: —
- o3-mini: 75.3 (#67)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| LiveBench Instruction Following | — | 84.4% |
| LMArena Instruction Following | — | 1338 |

## Long Context

- Mistral Medium 3: —
- o3-mini: 33.8 (#251)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| Fiction.LiveBench | — | 50% |
| LMArena Longer Query | — | 1343 |

## Writing & Preference

- Mistral Medium 3: —
- o3-mini: 50.4 (#177)

| Benchmark | Mistral Medium 3 | o3-mini |
|---|---|---|
| LMArena Text | — | 1337 |
| LMArena Creative Writing | — | 1286 |
| Short-Story Creative Writing | — | 61.7% |
| LMArena Multi-Turn | — | 1320 |
| LiveBench Language | — | 50.7% |

## FAQ

### Is Mistral Medium 3 better than o3-mini?

o3-mini has enough public results to be ranked (#205); Mistral Medium 3 does not yet, so treat this comparison as directional.

### Which is cheaper, Mistral Medium 3 or o3-mini?

Mistral Medium 3 is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; o3-mini lists at $1.10 and $4.40.

### Which has the bigger context window?

o3-mini does, with 200K tokens against 131K.

### How many benchmarks do Mistral Medium 3 and o3-mini share?

2 benchmarks have published results for both models. Mistral Medium 3 has 2 scored results on Noometry and o3-mini has 51.