# GPT-5 Pro vs Mistral Medium 3.1

> GPT-5 Pro is the stronger model overall, scoring 46.2 to 31.5 on the Noometry Index. Mistral Medium 3.1 costs 52× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-pro-vs-mistral-medium-3-1
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where GPT-5 Pro leads 39.2 to 10.1.
- Mistral Medium 3.1 is cheaper at $0.40 / $2 per million input/output tokens, against $15 / $120 for GPT-5 Pro.
- GPT-5 Pro accepts more context: 400K tokens versus 131K.

## Snapshot

| | GPT-5 Pro | Mistral Medium 3.1 |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 46.2 | 31.5 |
| Rank | 58 | 260 |
| Context | 400K | 131K |
| Input $/M | $15 | $0.40 |
| Output $/M | $120 | $2 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5 Pro: 43.4 (#77)
- Mistral Medium 3.1: —

| Benchmark | GPT-5 Pro | Mistral Medium 3.1 |
|---|---|---|
| WeirdML | 60.4% | — |
| AlgoTune | 1.31 | — |

## Reasoning

- GPT-5 Pro: 39.2 (#52)
- Mistral Medium 3.1: 10.1 (#336)

| Benchmark | GPT-5 Pro | Mistral Medium 3.1 |
|---|---|---|
| ARC-AGI-2 | 18.3% | — |
| SimpleBench | 61.6% | — |
| Kagi LLM Benchmark | 76.8% | — |
| NYT Connections (extended) | — | 6.5% |
| ARC-AGI-1 | 70.2% | — |
| EnigmaEval | 18.8% | — |
| Thematic Generalization | — | 20.3% |
| Epoch Capabilities Index | 150.26 | — |

## Math

- GPT-5 Pro: 48.0 (#53)
- Mistral Medium 3.1: —

| Benchmark | GPT-5 Pro | Mistral Medium 3.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| FrontierMath Tier 4 (v1) | 14.6% | — |

## Knowledge

- GPT-5 Pro: 56.2 (#39)
- Mistral Medium 3.1: —

| Benchmark | GPT-5 Pro | Mistral Medium 3.1 |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |

## Writing & Preference

- GPT-5 Pro: —
- Mistral Medium 3.1: 55.6 (#140)

| Benchmark | GPT-5 Pro | Mistral Medium 3.1 |
|---|---|---|
| EQ-Bench Creative Writing | — | 1476 |

## FAQ

### Is GPT-5 Pro better than Mistral Medium 3.1?

GPT-5 Pro is the stronger model overall, scoring 46.2 to 31.5 on the Noometry Index. Mistral Medium 3.1 costs 52× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.

### Which is cheaper, GPT-5 Pro or Mistral Medium 3.1?

Mistral Medium 3.1 is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; GPT-5 Pro lists at $15 and $120.

### Which has the bigger context window?

GPT-5 Pro does, with 400K tokens against 131K.

### How many benchmarks do GPT-5 Pro and Mistral Medium 3.1 share?

0 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and Mistral Medium 3.1 has 3.