Model comparison
Devstral Small 2505 vs Mistral Small 3
Devstral Small 2505 is the stronger model overall, scoring 34.3 to 31.2 on the Noometry Index. Mistral Small 3 costs 2.6× less per token, which makes it the better buy when Devstral Small 2505's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Mistral AISummary
- Mistral Small 3 is cheaper at $0.05 / $0.08 per million input/output tokens, against $0.10 / $0.30 for Devstral Small 2505.
- Devstral Small 2505 accepts more context: 128K tokens versus 33K.
Side by side
| Devstral Small 2505 | Mistral Small 3 | |
|---|---|---|
| Provider | Mistral AI | Mistral AI |
| Noometry Index | 34.3 | 31.2 |
| Released | 2025-05-07 | 2025-01-30 |
| Weights | Open | Open |
| Context window | 128K | 33K |
| Max output | 128K | 16K |
| Input $ / M tokens | $0.10 | $0.05 |
| Output $ / M tokens | $0.30 | $0.08 |
| Results tracked | 4 | 24 |
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Category by category
Coding Devstral Small 2505 leads
Devstral Small 2505: 38.9 (#166), Mistral Small 3: 36.5 (#207)
| Benchmark | Devstral Small 2505 | Mistral Small 3 |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| SciCode | 28.8% | — |
| BigCodeBench Instruct | — | 45.3% |
| LMArena Coding | — | 1246 |
| BigCodeBench Complete | — | 50.4% |
Reasoning Too close to call
Devstral Small 2505: 19.7 (#252), Mistral Small 3: 18.9 (#273)
| Benchmark | Devstral Small 2505 | Mistral Small 3 |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | — |
| CritPt | 0% | — |
| Chess Puzzles | — | 0% |
| LMArena Hard Prompts | — | 1233 |
| Epoch Capabilities Index | — | 127.07 |
Math Not comparable
Devstral Small 2505: —, Mistral Small 3: 16.3 (#295)
| Benchmark | Devstral Small 2505 | Mistral Small 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 6.7% |
| LMArena Math | — | 1240 |
Knowledge Not comparable
Devstral Small 2505: —, Mistral Small 3: 25.1 (#263)
| Benchmark | Devstral Small 2505 | Mistral Small 3 |
|---|---|---|
| GPQA Diamond | — | 47.3% |
| Confabulations | — | 25.2% |
| LMArena Expert | — | 1202 |
Multilingual Not comparable
Devstral Small 2505: —, Mistral Small 3: 37.3 (#236)
| Benchmark | Devstral Small 2505 | Mistral Small 3 |
|---|---|---|
| LMArena Non-English | — | 1198 |
| LMArena Chinese | — | 1204 |
| LMArena French | — | 1203 |
| LMArena German | — | 1211 |
| LMArena Japanese | — | 1111 |
| LMArena Korean | — | 1188 |
| LMArena Russian | — | 1216 |
Instruction Following Not comparable
Devstral Small 2505: —, Mistral Small 3: 63.7 (#229)
| Benchmark | Devstral Small 2505 | Mistral Small 3 |
|---|---|---|
| LMArena Instruction Following | — | 1214 |
Long Context Not comparable
Devstral Small 2505: —, Mistral Small 3: 37.8 (#211)
| Benchmark | Devstral Small 2505 | Mistral Small 3 |
|---|---|---|
| LMArena Longer Query | — | 1246 |
Writing & Preference Not comparable
Devstral Small 2505: —, Mistral Small 3: 32.2 (#280)
| Benchmark | Devstral Small 2505 | Mistral Small 3 |
|---|---|---|
| LMArena Text | — | 1234 |
| LMArena Creative Writing | — | 1195 |
| EQ-Bench Creative Writing | — | 707 |
| LMArena Multi-Turn | — | 1217 |
Frequently asked questions
Is Devstral Small 2505 better than Mistral Small 3?
Devstral Small 2505 is the stronger model overall, scoring 34.3 to 31.2 on the Noometry Index. Mistral Small 3 costs 2.6× less per token, which makes it the better buy when Devstral Small 2505's lead doesn't matter for your workload.
Which is cheaper, Devstral Small 2505 or Mistral Small 3?
Mistral Small 3 is cheaper. It lists at $0.05 per million input tokens and $0.08 per million output tokens; Devstral Small 2505 lists at $0.10 and $0.30.
Is Devstral Small 2505 or Mistral Small 3 better for coding?
Devstral Small 2505 scores higher on coding benchmarks: 38.9 versus 36.5 in the Noometry coding category.
Which has the bigger context window?
Devstral Small 2505 does, with 128K tokens against 33K.
How many benchmarks do Devstral Small 2505 and Mistral Small 3 share?
0 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Mistral Small 3 has 24.