Model comparison
Devstral Small 2505 vs Yi-Lightning
Yi-Lightning is the stronger model overall, scoring 37.1 to 34.3 on the Noometry Index.
Last verified . 0 shared benchmarks.
Mistral AISummary
- The widest gap is in coding, where Devstral Small 2505 leads 38.9 to 27.4.
- Devstral Small 2505 has downloadable open weights; the other is API-only.
Side by side
| Devstral Small 2505 | Yi-Lightning | |
|---|---|---|
| Provider | Mistral AI | 01.AI |
| Noometry Index | 34.3 | 37.1 |
| Released | 2025-05-07 | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | 128K | — |
| Max output | 128K | — |
| Input $ / M tokens | $0.10 | — |
| Output $ / M tokens | $0.30 | — |
| Results tracked | 4 | 18 |
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Category by category
Coding Devstral Small 2505 leads
Devstral Small 2505: 38.9 (#166), Yi-Lightning: 27.4 (#320)
| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| Aider Polyglot | — | 12.9% |
| SciCode | 28.8% | — |
| LMArena Coding | — | 1312 |
Reasoning Yi-Lightning leads
Devstral Small 2505: 19.7 (#252), Yi-Lightning: 25.9 (#139)
| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | — |
| CritPt | 0% | — |
| LMArena Hard Prompts | — | 1302 |
Math Not comparable
Devstral Small 2505: —, Yi-Lightning: 36.2 (#172)
| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Math | — | 1300 |
Knowledge Not comparable
Devstral Small 2505: —, Yi-Lightning: 35.4 (#185)
| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Expert | — | 1286 |
Multilingual Not comparable
Devstral Small 2505: —, Yi-Lightning: 42.2 (#196)
| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | — | 1269 |
| LMArena Chinese | — | 1320 |
| LMArena French | — | 1305 |
| LMArena German | — | 1267 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Russian | — | 1255 |
| LMArena Spanish | — | 1315 |
Instruction Following Not comparable
Devstral Small 2505: —, Yi-Lightning: 67.4 (#196)
| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | — | 1278 |
Long Context Not comparable
Devstral Small 2505: —, Yi-Lightning: 39.4 (#181)
| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | — | 1297 |
Writing & Preference Not comparable
Devstral Small 2505: —, Yi-Lightning: 50.2 (#184)
| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Text | — | 1302 |
| LMArena Creative Writing | — | 1280 |
| LMArena Multi-Turn | — | 1311 |
Frequently asked questions
Is Devstral Small 2505 better than Yi-Lightning?
Yi-Lightning is the stronger model overall, scoring 37.1 to 34.3 on the Noometry Index.
Is Devstral Small 2505 or Yi-Lightning better for coding?
Devstral Small 2505 scores higher on coding benchmarks: 38.9 versus 27.4 in the Noometry coding category.
How many benchmarks do Devstral Small 2505 and Yi-Lightning share?
0 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Yi-Lightning has 18.