Model comparison
GPT-5 Pro vs Mistral Medium 3.1
GPT-5 Pro is the stronger model overall, scoring 46.4 to 31.9 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.
Last verified . 0 shared benchmarks.
Mistral AISummary
- The widest gap is in reasoning, where GPT-5 Pro leads 38.9 to 10.6.
- 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.
Side by side
| GPT-5 Pro | Mistral Medium 3.1 | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 46.4 | 31.9 |
| Released | 2025-10-06 | — |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 131K |
| Max output | 272K | 105K |
| Input $ / M tokens | $15 | $0.40 |
| Output $ / M tokens | $120 | $2 |
| Results tracked | 12 | 3 |
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Category by category
Coding Not comparable
GPT-5 Pro: 44.0 (#80), Mistral Medium 3.1: —
Reasoning GPT-5 Pro leads
GPT-5 Pro: 38.9 (#62), Mistral Medium 3.1: 10.6 (#341)
| 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 | 150.28 | — |
Math Not comparable
GPT-5 Pro: 48.5 (#63), 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 Not comparable
GPT-5 Pro: 56.7 (#42), Mistral Medium 3.1: —
| Benchmark | GPT-5 Pro | Mistral Medium 3.1 |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |
Writing & Preference Not comparable
GPT-5 Pro: —, Mistral Medium 3.1: 55.5 (#145)
| Benchmark | GPT-5 Pro | Mistral Medium 3.1 |
|---|---|---|
| EQ-Bench Creative Writing | — | 1476 |
Frequently asked questions
Is GPT-5 Pro better than Mistral Medium 3.1?
GPT-5 Pro is the stronger model overall, scoring 46.4 to 31.9 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.