Model comparison
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.
Last verified . 0 shared benchmarks.
Mistral AISummary
- 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.
Side by side
| Devstral Small 2505 | o1-mini | |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 34.3 | 34.0 |
| Released | 2025-05-07 | 2024-09-12 |
| Weights | Open | Proprietary |
| Context window | 128K | — |
| Max output | 128K | — |
| Input $ / M tokens | $0.10 | — |
| Output $ / M tokens | $0.30 | — |
| Results tracked | 4 | 39 |
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Category by category
Coding Devstral Small 2505 leads
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 Not comparable
Devstral Small 2505: —, o1-mini: 24.6 (#118)
| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| Cybench | — | 10% |
Reasoning Devstral Small 2505 leads
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 Not comparable
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 Not comparable
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 Not comparable
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 Not comparable
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 Not comparable
Devstral Small 2505: —, o1-mini: 40.1 (#161)
| Benchmark | Devstral Small 2505 | o1-mini |
|---|---|---|
| LMArena Longer Query | — | 1320 |
Writing & Preference Not comparable
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% |
Frequently asked questions
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.