# 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.

- Canonical page: https://noometry.com/compare/ministral-3b-vs-o3-pro
- Last updated: 2026-10-10
- Shared benchmarks: 4

## Summary

- 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.

## Snapshot

| | Ministral 3B | o3-pro |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 26.2 | 42.9 |
| Rank | 338 | 105 |
| Context | 131K | 200K |
| Input $/M | $0.10 | $20 |
| Output $/M | $0.10 | $80 |
| Weights | Open | Proprietary |

## Coding

- Ministral 3B: —
- o3-pro: 55.5 (#24)

| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| WeirdML | — | 58.2% |

## Reasoning

- 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

- Ministral 3B: 26.6 (#258)
- o3-pro: —

| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| MATH Level 5 | 14.4% | — |

## Knowledge

- 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

- Ministral 3B: —
- o3-pro: 72.2 (#1)

| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |

## Writing & Preference

- Ministral 3B: —
- o3-pro: 57.1 (#133)

| Benchmark | Ministral 3B | o3-pro |
|---|---|---|
| Short-Story Creative Writing | — | 84.4% |

## FAQ

### 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.