# Devstral Small 2505 vs Gemma 4 31B IT

> Gemma 4 31B IT is the stronger model overall, scoring 43.5 to 34.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/devstral-small-vs-gemma-4-31b-it
- Last updated: 2026-10-11
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Devstral Small 2505 scores higher in 0 categories and Gemma 4 31B IT in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemma 4 31B IT leads 27.2 to 19.7.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 37.7% for Devstral Small 2505 and 63.5% for Gemma 4 31B IT.
- Both cost about the same: $0.10 input and $0.30 output per million tokens.
- Gemma 4 31B IT accepts more context: 262K tokens versus 128K.

## Snapshot

| | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| Provider | Mistral AI | Google |
| Noometry Index | 34.3 | 43.5 |
| Rank | 233 | 90 |
| Context | 128K | 262K |
| Input $/M | $0.10 | $0.09 |
| Output $/M | $0.30 | $0.34 |
| Weights | Open | Open |

## Coding

- Devstral Small 2505: 38.9 (#166)
- Gemma 4 31B IT: 42.3 (#108)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| SciCode | 28.8% | 43.4% |
| SWE-bench Verified (bash only) | 56.4% | — |
| LMArena WebDev | — | 1366 |
| WeirdML | — | 52.3% |
| LMArena Coding | — | 1459 |
| ALE-Bench | — | 925.5 |

## Reasoning

- Devstral Small 2505: 19.7 (#252)
- Gemma 4 31B IT: 27.2 (#122)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | 63.5% |
| CritPt | 0% | 1.4% |
| NYT Connections (extended) | — | 70.6% |
| Chess Puzzles | — | 5% |
| Thematic Generalization | — | 53% |
| LMArena Hard Prompts | — | 1448 |
| DTBench | — | 82.7% |
| LMCA | — | 39.3% |
| Surface Evolver Bench | — | 30.6% |
| Epoch Capabilities Index | — | 142.74 |

## Math

- Devstral Small 2505: —
- Gemma 4 31B IT: 43.2 (#81)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 73.3% |
| LMArena Math | — | 1465 |

## Knowledge

- Devstral Small 2505: —
- Gemma 4 31B IT: 37.9 (#151)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| GPQA Diamond | — | 75.8% |
| SimpleQA Verified | — | 10.4% |
| Vectara Hallucination Rate | — | 7.4% |
| LMArena Expert | — | 1465 |

## Multimodal

- Devstral Small 2505: —
- Gemma 4 31B IT: 41.6 (#34)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| LMArena Vision | — | 1277 |
| LMArena Document | — | 1425 |

## Multilingual

- Devstral Small 2505: —
- Gemma 4 31B IT: 53.8 (#57)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| LMArena Non-English | — | 1431 |
| LMArena Chinese | — | 1476 |
| LMArena French | — | 1435 |
| LMArena Russian | — | 1460 |
| LMArena Spanish | — | 1444 |

## Instruction Following

- Devstral Small 2505: —
- Gemma 4 31B IT: 75.5 (#61)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| LMArena Instruction Following | — | 1433 |

## Long Context

- Devstral Small 2505: —
- Gemma 4 31B IT: 44.2 (#71)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| LMArena Longer Query | — | 1446 |

## Writing & Preference

- Devstral Small 2505: —
- Gemma 4 31B IT: 60.5 (#96)

| Benchmark | Devstral Small 2505 | Gemma 4 31B IT |
|---|---|---|
| LMArena Text | — | 1443 |
| LMArena Creative Writing | — | 1415 |
| EQ-Bench Creative Writing | — | 1368 |
| EQ-Bench 4 | — | 1120 |
| LMArena Multi-Turn | — | 1452 |

## FAQ

### Is Devstral Small 2505 better than Gemma 4 31B IT?

Gemma 4 31B IT is the stronger model overall, scoring 43.5 to 34.3 on the Noometry Index.

### Which is cheaper, Devstral Small 2505 or Gemma 4 31B IT?

Devstral Small 2505 is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Gemma 4 31B IT lists at $0.09 and $0.34.

### Is Devstral Small 2505 or Gemma 4 31B IT better for coding?

Gemma 4 31B IT scores higher on coding benchmarks: 42.3 versus 38.9 in the Noometry coding category.

### Which has the bigger context window?

Gemma 4 31B IT does, with 262K tokens against 128K.

### How many benchmarks do Devstral Small 2505 and Gemma 4 31B IT share?

3 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Gemma 4 31B IT has 35.