Model comparison
Magistral Medium vs o3-pro
o3-pro is the stronger model overall, scoring 42.7 to 34.8 on the Noometry Index. Magistral Medium costs 13× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.
Last verified . 3 shared benchmarks.
Mistral AISummary
- They share 3 benchmarks with published results for both. Magistral Medium scores higher in 1 category and o3-pro in 4 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.1 to 39.3.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 16.2% for Magistral Medium and 72.1% for o3-pro.
- Magistral Medium is cheaper at $2 / $5 per million input/output tokens, against $20 / $80 for o3-pro.
- o3-pro accepts more context: 200K tokens versus 128K.
- Magistral Medium has downloadable open weights; the other is API-only.
Side by side
| Magistral Medium | o3-pro | |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 34.8 | 42.7 |
| Released | 2025-03-17 | 2025-06-10 |
| Weights | Open | Proprietary |
| Context window | 128K | 200K |
| Max output | 16K | 100K |
| Input $ / M tokens | $2 | $20 |
| Output $ / M tokens | $5 | $80 |
| Results tracked | 22 | 12 |
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Category by category
Coding o3-pro leads
Magistral Medium: 38.6 (#161), o3-pro: 55.1 (#22)
| Benchmark | Magistral Medium | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| SciCode | 39.2% | — |
| WeirdML | — | 58.2% |
| LMArena Coding | 1319 | — |
Reasoning o3-pro leads
Magistral Medium: 8.7 (#342), o3-pro: 24.1 (#152)
| Benchmark | Magistral Medium | o3-pro |
|---|---|---|
| ARC-AGI-2 | 0% | 4.9% |
| Kagi LLM Benchmark | 16.2% | 72.1% |
| ARC-AGI-1 | 6.1% | 59.3% |
| CritPt | 0.3% | — |
| LMArena Hard Prompts | 1267 | — |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |
| Epoch Capabilities Index | — | 147.43 |
Math Not comparable
Magistral Medium: 32.4 (#187), o3-pro: —
| Benchmark | Magistral Medium | o3-pro |
|---|---|---|
| LMArena Math | 1249 | — |
Knowledge Magistral Medium leads
Magistral Medium: 32.9 (#199), o3-pro: 29.0 (#234)
| Benchmark | Magistral Medium | o3-pro |
|---|---|---|
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |
| LMArena Expert | 1222 | — |
Multilingual Not comparable
Magistral Medium: 39.8 (#219), o3-pro: —
| Benchmark | Magistral Medium | o3-pro |
|---|---|---|
| LMArena Non-English | 1232 | — |
| LMArena Chinese | 1225 | — |
| LMArena French | 1268 | — |
| LMArena German | 1248 | — |
| LMArena Japanese | 1176 | — |
| LMArena Korean | 1125 | — |
| LMArena Russian | 1224 | — |
| LMArena Spanish | 1269 | — |
Instruction Following Not comparable
Magistral Medium: 66.2 (#207), o3-pro: —
| Benchmark | Magistral Medium | o3-pro |
|---|---|---|
| LMArena Instruction Following | 1254 | — |
Long Context o3-pro leads
Magistral Medium: 39.3 (#178), o3-pro: 72.1 (#1)
| Benchmark | Magistral Medium | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1295 | — |
Writing & Preference o3-pro leads
Magistral Medium: 46.5 (#214), o3-pro: 57.1 (#128)
| Benchmark | Magistral Medium | o3-pro |
|---|---|---|
| LMArena Text | 1255 | — |
| LMArena Creative Writing | 1245 | — |
| Short-Story Creative Writing | — | 84.4% |
| LMArena Multi-Turn | 1275 | — |
Frequently asked questions
Is Magistral Medium better than o3-pro?
o3-pro is the stronger model overall, scoring 42.7 to 34.8 on the Noometry Index. Magistral Medium costs 13× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.
Which is cheaper, Magistral Medium or o3-pro?
Magistral Medium is cheaper. It lists at $2 per million input tokens and $5 per million output tokens; o3-pro lists at $20 and $80.
Is Magistral Medium or o3-pro better for coding?
o3-pro scores higher on coding benchmarks: 55.1 versus 38.6 in the Noometry coding category.
Which has the bigger context window?
o3-pro does, with 200K tokens against 128K.
How many benchmarks do Magistral Medium and o3-pro share?
3 benchmarks have published results for both models. Magistral Medium has 22 scored results on Noometry and o3-pro has 12.