Model comparison
Devstral Small 2505 vs Mistral Small 3.1
Devstral Small 2505 is the stronger model overall, scoring 33.9 to 31.4 on the Noometry Index.
Last verified . 0 shared benchmarks.
Mistral AISummary
- Devstral Small 2505 is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.35 / $0.56 for Mistral Small 3.1.
Side by side
| Devstral Small 2505 | Mistral Small 3.1 | |
|---|---|---|
| Provider | Mistral AI | Mistral AI |
| Noometry Index | 33.9 | 31.4 |
| Released | 2025-05-07 | 2025-03-17 |
| Weights | Open | Open |
| Context window | 128K | 128K |
| Max output | 128K | 102K |
| Input $ / M tokens | $0.10 | $0.35 |
| Output $ / M tokens | $0.30 | $0.56 |
| Results tracked | 4 | 28 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Too close to call
Devstral Small 2505: 38.6 (#160), Mistral Small 3.1: 37.7 (#175)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| SciCode | 28.8% | — |
| LMArena Coding | — | 1309 |
Reasoning Too close to call
Devstral Small 2505: 19.1 (#243), Mistral Small 3.1: 18.9 (#249)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | — |
| CritPt | 0% | — |
| Chess Puzzles | — | 1% |
| LMArena Hard Prompts | — | 1278 |
| Epoch Capabilities Index | — | 127.48 |
Math Not comparable
Devstral Small 2505: —, Mistral Small 3.1: 13.7 (#295)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 3.9% |
| Omni-MATH | — | 24.8% |
| LMArena Math | — | 1261 |
Knowledge Not comparable
Devstral Small 2505: —, Mistral Small 3.1: 22.6 (#266)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| GPQA Diamond | — | 41.9% |
| MMLU-Pro | — | 61% |
| GPQA (HELM) | — | 39.2% |
| LMArena Expert | — | 1258 |
Multimodal Not comparable
Devstral Small 2505: —, Mistral Small 3.1: 32.6 (#93)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| LMArena Vision | — | 1136 |
Multilingual Not comparable
Devstral Small 2505: —, Mistral Small 3.1: 41.4 (#204)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| LMArena Non-English | — | 1255 |
| LMArena Chinese | — | 1254 |
| LMArena French | — | 1270 |
| LMArena German | — | 1266 |
| LMArena Japanese | — | 1210 |
| LMArena Korean | — | 1206 |
| LMArena Russian | — | 1263 |
| LMArena Spanish | — | 1283 |
Instruction Following Not comparable
Devstral Small 2505: —, Mistral Small 3.1: 63.8 (#225)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| IFEval | — | 75% |
| LMArena Instruction Following | — | 1264 |
Long Context Not comparable
Devstral Small 2505: —, Mistral Small 3.1: 39.5 (#172)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| LMArena Longer Query | — | 1300 |
Writing & Preference Not comparable
Devstral Small 2505: —, Mistral Small 3.1: 37.2 (#254)
| Benchmark | Devstral Small 2505 | Mistral Small 3.1 |
|---|---|---|
| LMArena Text | — | 1278 |
| LMArena Creative Writing | — | 1253 |
| EQ-Bench Creative Writing | — | 761 |
| WildBench | — | 78.8% |
| LMArena Multi-Turn | — | 1270 |
Frequently asked questions
Is Devstral Small 2505 better than Mistral Small 3.1?
Devstral Small 2505 is the stronger model overall, scoring 33.9 to 31.4 on the Noometry Index.
Which is cheaper, Devstral Small 2505 or Mistral Small 3.1?
Devstral Small 2505 is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Mistral Small 3.1 lists at $0.35 and $0.56.
Is Devstral Small 2505 or Mistral Small 3.1 better for coding?
They score almost the same on coding (38.6 vs 37.7); test both on your own repository before choosing.
Which has the bigger context window?
Both accept 128K tokens.
How many benchmarks do Devstral Small 2505 and Mistral Small 3.1 share?
0 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Mistral Small 3.1 has 28.