# Devstral Small 2505 vs Yi-Lightning

> Yi-Lightning is the stronger model overall, scoring 36.5 to 33.9 on the Noometry Index.

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

## Summary

- The widest gap is in coding, where Devstral Small 2505 leads 38.6 to 27.0.
- Devstral Small 2505 has downloadable open weights; the other is API-only.

## Snapshot

| | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| Provider | Mistral AI | 01.AI |
| Noometry Index | 33.9 | 36.5 |
| Rank | 228 | 206 |
| Context | 128K | — |
| Input $/M | $0.10 | — |
| Output $/M | $0.30 | — |
| Weights | Open | Proprietary |

## Coding

- Devstral Small 2505: 38.6 (#160)
- Yi-Lightning: 27.0 (#315)

| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| Aider Polyglot | — | 12.9% |
| SciCode | 28.8% | — |
| LMArena Coding | — | 1313 |

## Reasoning

- Devstral Small 2505: 19.1 (#243)
- Yi-Lightning: 24.9 (#137)

| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | — |
| CritPt | 0% | — |
| LMArena Hard Prompts | — | 1302 |

## Math

- Devstral Small 2505: —
- Yi-Lightning: 33.5 (#173)

| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Math | — | 1300 |

## Knowledge

- Devstral Small 2505: —
- Yi-Lightning: 34.8 (#182)

| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Expert | — | 1286 |

## Multilingual

- Devstral Small 2505: —
- Yi-Lightning: 42.4 (#191)

| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | — | 1269 |
| LMArena Chinese | — | 1320 |
| LMArena French | — | 1304 |
| LMArena German | — | 1267 |
| LMArena Japanese | — | 1228 |
| LMArena Korean | — | 1192 |
| LMArena Russian | — | 1255 |
| LMArena Spanish | — | 1315 |

## Instruction Following

- Devstral Small 2505: —
- Yi-Lightning: 67.6 (#191)

| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | — | 1278 |

## Long Context

- Devstral Small 2505: —
- Yi-Lightning: 39.4 (#176)

| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | — | 1297 |

## Writing & Preference

- Devstral Small 2505: —
- Yi-Lightning: 50.4 (#178)

| Benchmark | Devstral Small 2505 | Yi-Lightning |
|---|---|---|
| LMArena Text | — | 1302 |
| LMArena Creative Writing | — | 1280 |
| LMArena Multi-Turn | — | 1311 |

## FAQ

### Is Devstral Small 2505 better than Yi-Lightning?

Yi-Lightning is the stronger model overall, scoring 36.5 to 33.9 on the Noometry Index.

### Is Devstral Small 2505 or Yi-Lightning better for coding?

Devstral Small 2505 scores higher on coding benchmarks: 38.6 versus 27.0 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.