# Devstral Small 2505 vs Yi-1.5-34B

> Devstral Small 2505 is the stronger model overall, scoring 34.3 to 30.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/devstral-small-vs-yi-1-5-34b
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where Devstral Small 2505 leads 38.9 to 32.4.

## Snapshot

| | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| Provider | Mistral AI | 01.AI |
| Noometry Index | 34.3 | 30.6 |
| Rank | 233 | 289 |
| Context | 128K | — |
| Input $/M | $0.10 | — |
| Output $/M | $0.30 | — |
| Weights | Open | Open |

## Coding

- Devstral Small 2505: 38.9 (#166)
- Yi-1.5-34B: 32.4 (#272)

| Benchmark | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| SciCode | 28.8% | — |
| BigCodeBench Instruct | — | 33.9% |
| LMArena Coding | — | 1169 |
| BigCodeBench Complete | — | 43.8% |

## Reasoning

- Devstral Small 2505: 19.7 (#252)
- Yi-1.5-34B: 22.5 (#191)

| Benchmark | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | — |
| CritPt | 0% | — |
| LMArena Hard Prompts | — | 1160 |

## Math

- Devstral Small 2505: —
- Yi-1.5-34B: 27.5 (#249)

| Benchmark | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| LMArena Math | — | 1182 |
| MATH Level 5 | — | 25.5% |

## Knowledge

- Devstral Small 2505: —
- Yi-1.5-34B: 14.8 (#295)

| Benchmark | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| GPQA Diamond | — | 32% |
| LMArena Expert | — | 1144 |

## Multilingual

- Devstral Small 2505: —
- Yi-1.5-34B: 32.3 (#256)

| Benchmark | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| LMArena Non-English | — | 1121 |
| LMArena Chinese | — | 1213 |
| LMArena French | — | 1156 |
| LMArena German | — | 1111 |
| LMArena Japanese | — | 1021 |
| LMArena Korean | — | 1005 |
| LMArena Russian | — | 1091 |
| LMArena Spanish | — | 1121 |

## Instruction Following

- Devstral Small 2505: —
- Yi-1.5-34B: 59.2 (#257)

| Benchmark | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| LMArena Instruction Following | — | 1139 |

## Long Context

- Devstral Small 2505: —
- Yi-1.5-34B: 34.6 (#248)

| Benchmark | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| LMArena Longer Query | — | 1143 |

## Writing & Preference

- Devstral Small 2505: —
- Yi-1.5-34B: 37.4 (#257)

| Benchmark | Devstral Small 2505 | Yi-1.5-34B |
|---|---|---|
| LMArena Text | — | 1173 |
| LMArena Creative Writing | — | 1135 |
| LMArena Multi-Turn | — | 1153 |

## FAQ

### Is Devstral Small 2505 better than Yi-1.5-34B?

Devstral Small 2505 is the stronger model overall, scoring 34.3 to 30.6 on the Noometry Index.

### Is Devstral Small 2505 or Yi-1.5-34B better for coding?

Devstral Small 2505 scores higher on coding benchmarks: 38.9 versus 32.4 in the Noometry coding category.

### How many benchmarks do Devstral Small 2505 and Yi-1.5-34B share?

0 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Yi-1.5-34B has 21.