# Devstral Small 2505 vs o1-mini

> Devstral Small 2505 and o1-mini score almost the same on the Noometry Index (34.3 vs 34.0), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/devstral-small-vs-o1-mini
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where Devstral Small 2505 leads 19.7 to 8.8.
- Devstral Small 2505 has downloadable open weights; the other is API-only.

## Snapshot

| | Devstral Small 2505 | o1-mini |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 34.3 | 34.0 |
| Rank | 233 | 235 |
| Context | 128K | — |
| Input $/M | $0.10 | — |
| Output $/M | $0.30 | — |
| Weights | Open | Proprietary |

## Coding

- Devstral Small 2505: 38.9 (#166)
- o1-mini: 35.5 (#224)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| Aider Polyglot | — | 32.9% |
| SciCode | 28.8% | — |
| WeirdML | — | 36.3% |
| LiveBench Coding | — | 48% |
| LMArena Coding | — | 1362 |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |

## Agentic & Tool Use

- Devstral Small 2505: —
- o1-mini: 24.6 (#118)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| Cybench | — | 10% |

## Reasoning

- Devstral Small 2505: 19.7 (#252)
- o1-mini: 8.8 (#346)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| ARC-AGI-2 | — | 0.8% |
| SimpleBench | — | 18.1% |
| Kagi LLM Benchmark | 37.7% | — |
| ARC-AGI-1 | — | 14% |
| CritPt | 0% | — |
| LiveBench Reasoning | — | 72.3% |
| LMArena Hard Prompts | — | 1333 |
| LiveBench Data Analysis | — | 57.9% |
| Epoch Capabilities Index | — | 135.82 |
| LiveBench | — | 57.8% |

## Math

- Devstral Small 2505: —
- o1-mini: 35.4 (#186)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 46.9% |
| LiveBench Math | — | 62% |
| LMArena Math | — | 1358 |
| MATH Level 5 | — | 89.2% |
| FrontierMath (Feb 2025 set) | — | 1.7% |

## Knowledge

- Devstral Small 2505: —
- o1-mini: 34.9 (#192)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| GPQA Diamond | — | 62.4% |
| Confabulations | — | 18.6% |
| LMArena Expert | — | 1316 |

## Multilingual

- Devstral Small 2505: —
- o1-mini: 43.6 (#182)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| LMArena Non-English | — | 1289 |
| LMArena Chinese | — | 1314 |
| LMArena French | — | 1293 |
| LMArena German | — | 1278 |
| LMArena Japanese | — | 1245 |
| LMArena Korean | — | 1223 |
| LMArena Russian | — | 1283 |
| LMArena Spanish | — | 1303 |

## Instruction Following

- Devstral Small 2505: —
- o1-mini: 66.7 (#206)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| LiveBench Instruction Following | — | 65.4% |
| LMArena Instruction Following | — | 1304 |

## Long Context

- Devstral Small 2505: —
- o1-mini: 40.1 (#161)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| LMArena Longer Query | — | 1320 |

## Writing & Preference

- Devstral Small 2505: —
- o1-mini: 48.4 (#202)

| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| LMArena Text | — | 1317 |
| LMArena Creative Writing | — | 1244 |
| Short-Story Creative Writing | — | 64.9% |
| LMArena Multi-Turn | — | 1314 |
| LiveBench Language | — | 40.9% |

## FAQ

### Is Devstral Small 2505 better than o1-mini?

Devstral Small 2505 and o1-mini score almost the same on the Noometry Index (34.3 vs 34.0), so choose on price, context window or the category you care about most.

### Is Devstral Small 2505 or o1-mini better for coding?

Devstral Small 2505 scores higher on coding benchmarks: 38.9 versus 35.5 in the Noometry coding category.

### How many benchmarks do Devstral Small 2505 and o1-mini share?

0 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and o1-mini has 39.