Model comparison
Mistral Medium 3.1 vs o3-pro
o3-pro is the stronger model overall, scoring 42.9 to 31.9 on the Noometry Index. Mistral Medium 3.1 costs 44× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Mistral AISummary
- The widest gap is in reasoning, where o3-pro leads 23.8 to 10.6.
- Mistral Medium 3.1 is cheaper at $0.40 / $2 per million input/output tokens, against $20 / $80 for o3-pro.
- o3-pro accepts more context: 200K tokens versus 131K.
Side by side
| Mistral Medium 3.1 | o3-pro | |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 31.9 | 42.9 |
| Released | — | 2025-06-10 |
| Weights | Proprietary | Proprietary |
| Context window | 131K | 200K |
| Max output | 105K | 100K |
| Input $ / M tokens | $0.40 | $20 |
| Output $ / M tokens | $2 | $80 |
| Results tracked | 3 | 12 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
Mistral Medium 3.1: —, o3-pro: 55.5 (#24)
| Benchmark | Mistral Medium 3.1 | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| WeirdML | — | 58.2% |
Reasoning o3-pro leads
Mistral Medium 3.1: 10.6 (#341), o3-pro: 23.8 (#171)
| Benchmark | Mistral Medium 3.1 | o3-pro |
|---|---|---|
| ARC-AGI-2 | — | 4.9% |
| Kagi LLM Benchmark | — | 72.1% |
| NYT Connections (extended) | 6.5% | — |
| ARC-AGI-1 | — | 59.3% |
| Thematic Generalization | 20.3% | — |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |
| Epoch Capabilities Index | — | 147.42 |
Knowledge Not comparable
Mistral Medium 3.1: —, o3-pro: 29.5 (#238)
| Benchmark | Mistral Medium 3.1 | o3-pro |
|---|---|---|
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |
Long Context Not comparable
Mistral Medium 3.1: —, o3-pro: 72.2 (#1)
| Benchmark | Mistral Medium 3.1 | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
Writing & Preference o3-pro leads
Mistral Medium 3.1: 55.5 (#145), o3-pro: 57.1 (#133)
| Benchmark | Mistral Medium 3.1 | o3-pro |
|---|---|---|
| Short-Story Creative Writing | — | 84.4% |
| EQ-Bench Creative Writing | 1476 | — |
Frequently asked questions
Is Mistral Medium 3.1 better than o3-pro?
o3-pro is the stronger model overall, scoring 42.9 to 31.9 on the Noometry Index. Mistral Medium 3.1 costs 44× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.
Which is cheaper, Mistral Medium 3.1 or o3-pro?
Mistral Medium 3.1 is cheaper. It lists at $0.40 per million input tokens and $2 per million output tokens; o3-pro lists at $20 and $80.
Which has the bigger context window?
o3-pro does, with 200K tokens against 131K.
How many benchmarks do Mistral Medium 3.1 and o3-pro share?
0 benchmarks have published results for both models. Mistral Medium 3.1 has 3 scored results on Noometry and o3-pro has 12.