# Gemini 3.1 Pro Preview vs Mistral Medium

> Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 36.3 on the Noometry Index. Mistral Medium costs 1.5× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gemini-3-1-pro-preview-vs-mistral-medium
- Last updated: 2026-10-10
- Shared benchmarks: 30

## Summary

- They share 30 benchmarks with published results for both. Gemini 3.1 Pro Preview scores higher in 10 categories and Mistral Medium in 0 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 24.0.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 95.6% for Gemini 3.1 Pro Preview and 32.2% for Mistral Medium.
- Mistral Medium is cheaper at $1.50 / $7.50 per million input/output tokens, against $2 / $12 for Gemini 3.1 Pro Preview.
- Gemini 3.1 Pro Preview accepts more context: 1.05M tokens versus 262K.
- Mistral Medium has downloadable open weights; the other is API-only.

## Snapshot

| | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| Provider | Google | Mistral AI |
| Noometry Index | 56.7 | 36.3 |
| Rank | 23 | 218 |
| Context | 1.05M | 262K |
| Input $/M | $2 | $1.50 |
| Output $/M | $12 | $7.50 |
| Weights | Proprietary | Open |

## Coding

- Gemini 3.1 Pro Preview: 42.5 (#99)
- Mistral Medium: 34.2 (#243)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| SciCode | 58.9% | 40.2% |
| WeirdML | 72.1% | 43.7% |
| LMArena Coding | 1484 | 1434 |
| ALE-Bench | 1,161 | 763.98 |
| SWE-bench Verified | 75.6% | — |
| DeepSWE | 11.7% | — |
| FrontierCode | — | 8% |
| LMArena WebDev | 1447 | — |
| GSO | 22.6% | — |
| MirrorCode | 8.9% | — |
| AlgoTune | 2.02 | — |

## Agentic & Tool Use

- Gemini 3.1 Pro Preview: 37.7 (#34)
- Mistral Medium: 28.3 (#90)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| Terminal-Bench | 80.2% | — |
| APEX-Agents | 35.3% | — |
| Berkeley Function Calling Leaderboard | — | 37.7% |
| τ²-bench Banking | 26% | — |
| DeepResearch Bench | 47.8% | — |
| PostTrainBench | 22% | — |
| BALROG | 57% | — |
| ExploitBench | 26.1% | — |
| GBAEval | 0.8% | — |
| GDP.pdf | 17% | — |
| LMArena Search | 1211 | — |
| METR Time Horizons | 77% | — |
| Vending-Bench 2 | 3,774 | — |

## Reasoning

- Gemini 3.1 Pro Preview: 71.7 (#12)
- Mistral Medium: 24.0 (#167)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| CritPt | 17.7% | 0% |
| LMArena Hard Prompts | 1485 | 1426 |
| DTBench | 97.1% | 75.5% |
| LMCA | 53.8% | 26.1% |
| ARC-AGI-2 | 77.1% | — |
| SimpleBench | 79.6% | — |
| Kagi LLM Benchmark | — | 50% |
| NYT Connections (extended) | 97.4% | — |
| ARC-AGI-1 | 98% | — |
| Chess Puzzles | 55% | — |
| EnigmaEval | 36.8% | — |
| Thematic Generalization | 79.4% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 34% | — |
| Surface Evolver Bench | — | 26.9% |
| Epoch Capabilities Index | 154.77 | — |
| ForecastBench | 59 | — |

## Math

- Gemini 3.1 Pro Preview: 62.1 (#34)
- Mistral Medium: 28.1 (#245)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 95.6% | 32.2% |
| ProofBench | 26% | 9% |
| LMArena Math | 1485 | 1408 |
| FrontierMath (Feb 2025 set) | 36.9% | 0.3% |
| FrontierMath (Tiers 1-3) | 59.6% | — |
| FrontierMath Tier 4 | 26.8% | — |
| MathArena Final-Answer Competitions | 86.5% | — |
| MATH Level 5 | — | 81.6% |
| FrontierMath Tier 4 (v1) | 16.7% | — |

## Knowledge

- Gemini 3.1 Pro Preview: 71.8 (#3)
- Mistral Medium: 25.0 (#265)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| GPQA Diamond | 94.4% | 59.5% |
| Humanity's Last Exam | 46.4% | 4.5% |
| Vectara Hallucination Rate | 10.4% | 22.7% |
| LMArena Expert | 1485 | 1408 |
| SimpleQA Verified | 73.5% | — |

## Multimodal

- Gemini 3.1 Pro Preview: 37.9 (#69)
- Mistral Medium: 35.3 (#88)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| LMArena Vision | 1296 | 1172 |
| Blueprint-Bench 2 | 26.5% | — |
| Furniture Assembly | 26.7% | — |
| LMArena Document | 1444 | — |

## Multilingual

- Gemini 3.1 Pro Preview: 57.0 (#12)
- Mistral Medium: 52.1 (#91)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| LMArena Non-English | 1477 | 1408 |
| LMArena Chinese | 1529 | 1447 |
| LMArena French | 1487 | 1459 |
| LMArena German | 1491 | 1432 |
| LMArena Japanese | 1493 | 1378 |
| LMArena Korean | 1455 | 1380 |
| LMArena Russian | 1498 | 1411 |
| LMArena Spanish | 1479 | 1433 |

## Instruction Following

- Gemini 3.1 Pro Preview: 77.0 (#32)
- Mistral Medium: 73.7 (#116)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| LMArena Instruction Following | 1466 | 1398 |

## Long Context

- Gemini 3.1 Pro Preview: 47.4 (#18)
- Mistral Medium: 42.9 (#114)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| LMArena Longer Query | 1483 | 1406 |
| CL-bench | 20.8% | — |
| CL-bench Life | 16.9% | — |

## Writing & Preference

- Gemini 3.1 Pro Preview: 66.1 (#37)
- Mistral Medium: 60.0 (#103)

| Benchmark | Gemini 3.1 Pro Preview | Mistral Medium |
|---|---|---|
| LMArena Text | 1481 | 1424 |
| LMArena Creative Writing | 1482 | 1391 |
| LMArena Multi-Turn | 1488 | 1418 |
| Short-Story Creative Writing | — | 77.3% |
| EQ-Bench Creative Writing | 1491 | — |
| EQ-Bench 4 | 1142 | — |

## FAQ

### Is Gemini 3.1 Pro Preview better than Mistral Medium?

Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 36.3 on the Noometry Index. Mistral Medium costs 1.5× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.

### Which is cheaper, Gemini 3.1 Pro Preview or Mistral Medium?

Mistral Medium is cheaper. It lists at $1.50 per million input tokens and $7.50 per million output tokens; Gemini 3.1 Pro Preview lists at $2 and $12.

### Is Gemini 3.1 Pro Preview or Mistral Medium better for coding?

Gemini 3.1 Pro Preview scores higher on coding benchmarks: 42.5 versus 34.2 in the Noometry coding category.

### Which has the bigger context window?

Gemini 3.1 Pro Preview does, with 1.05M tokens against 262K.

### How many benchmarks do Gemini 3.1 Pro Preview and Mistral Medium share?

30 benchmarks have published results for both models. Gemini 3.1 Pro Preview has 71 scored results on Noometry and Mistral Medium has 36.