Model comparison
Ministral 3B vs o3-pro
o3-pro is the stronger model overall, scoring 42.9 to 26.2 on the Noometry Index. Ministral 3B costs 350× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.
Last verified . 4 shared benchmarks.
Mistral AISummary
- They share 4 benchmarks with published results for both. Ministral 3B scores higher in 0 categories and o3-pro in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where o3-pro leads 29.5 to 10.4.
- The biggest single-benchmark swing is DTBench: 51.7% for Ministral 3B and 86.9% for o3-pro.
- Ministral 3B is cheaper at $0.10 / $0.10 per million input/output tokens, against $20 / $80 for o3-pro.
- o3-pro accepts more context: 200K tokens versus 131K.
- Ministral 3B has downloadable open weights; the other is API-only.
Side by side
| Ministral 3B | o3-pro | |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 26.2 | 42.9 |
| Released | 2024-10-01 | 2025-06-10 |
| Weights | Open | Proprietary |
| Context window | 131K | 200K |
| Max output | 262K | 100K |
| Input $ / M tokens | $0.10 | $20 |
| Output $ / M tokens | $0.10 | $80 |
| Results tracked | 6 | 12 |
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Category by category
Coding Not comparable
Ministral 3B: —, o3-pro: 55.5 (#24)
| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| WeirdML | — | 58.2% |
Reasoning o3-pro leads
Ministral 3B: 18.4 (#282), o3-pro: 23.8 (#171)
| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| DTBench | 51.7% | 86.9% |
| LMCA | 5.5% | 38.5% |
| Epoch Capabilities Index | 118.1 | 147.42 |
| ARC-AGI-2 | — | 4.9% |
| Kagi LLM Benchmark | — | 72.1% |
| ARC-AGI-1 | — | 59.3% |
Math Not comparable
Ministral 3B: 26.6 (#258), o3-pro: —
| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| MATH Level 5 | 14.4% | — |
Knowledge o3-pro leads
Ministral 3B: 10.4 (#302), o3-pro: 29.5 (#238)
| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| Vectara Hallucination Rate | 7.3% | 23.3% |
| GPQA Diamond | 25.3% | — |
| Confabulations | — | 14.2% |
Long Context Not comparable
Ministral 3B: —, o3-pro: 72.2 (#1)
| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
Writing & Preference Not comparable
Ministral 3B: —, o3-pro: 57.1 (#133)
| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| Short-Story Creative Writing | — | 84.4% |
Frequently asked questions
Is Ministral 3B better than o3-pro?
o3-pro is the stronger model overall, scoring 42.9 to 26.2 on the Noometry Index. Ministral 3B costs 350× less per token, which makes it the better buy when o3-pro's lead doesn't matter for your workload.
Which is cheaper, Ministral 3B or o3-pro?
Ministral 3B is cheaper. It lists at $0.10 per million input tokens and $0.10 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 Ministral 3B and o3-pro share?
4 benchmarks have published results for both models. Ministral 3B has 6 scored results on Noometry and o3-pro has 12.