# Devstral Small 2505 vs Gemma 3 12B

> Devstral Small 2505 is the stronger model overall, scoring 33.9 to 31.8 on the Noometry Index. Gemma 3 12B costs 2.0× less per token, which makes it the better buy when Devstral Small 2505's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/devstral-small-vs-gemma-3-12b
- Last updated: 2026-10-10
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Devstral Small 2505 scores higher in 2 categories and Gemma 3 12B in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in coding, where Devstral Small 2505 leads 38.6 to 31.2.
- The biggest single-benchmark swing is SciCode: 28.8% for Devstral Small 2505 and 17.4% for Gemma 3 12B.
- Gemma 3 12B is cheaper at $0.05 / $0.15 per million input/output tokens, against $0.10 / $0.30 for Devstral Small 2505.
- Gemma 3 12B accepts more context: 131K tokens versus 128K.

## Snapshot

| | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| Provider | Mistral AI | Google |
| Noometry Index | 33.9 | 31.8 |
| Rank | 228 | 255 |
| Context | 128K | 131K |
| Input $/M | $0.10 | $0.05 |
| Output $/M | $0.30 | $0.15 |
| Weights | Open | Open |

## Coding

- Devstral Small 2505: 38.6 (#160)
- Gemma 3 12B: 31.2 (#276)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| SciCode | 28.8% | 17.4% |
| SWE-bench Verified (bash only) | 56.4% | — |
| LMArena Coding | — | 1281 |

## Agentic & Tool Use

- Devstral Small 2505: —
- Gemma 3 12B: 25.3 (#101)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 30.4% |

## Reasoning

- Devstral Small 2505: 19.1 (#243)
- Gemma 3 12B: 15.2 (#307)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| CritPt | 0% | 0% |
| Kagi LLM Benchmark | 37.7% | — |
| Chess Puzzles | — | 0% |
| LMArena Hard Prompts | — | 1309 |
| DTBench | — | 48.8% |
| LMCA | — | 4.5% |
| Epoch Capabilities Index | — | 123.49 |

## Math

- Devstral Small 2505: —
- Gemma 3 12B: 21.0 (#273)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 16.7% |
| LMArena Math | — | 1307 |

## Knowledge

- Devstral Small 2505: —
- Gemma 3 12B: 26.5 (#250)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| GPQA Diamond | — | 39.5% |
| Vectara Hallucination Rate | — | 4.4% |
| LMArena Expert | — | 1248 |

## Multimodal

- Devstral Small 2505: —
- Gemma 3 12B: —

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| MindCube | — | 46.7% |

## Multilingual

- Devstral Small 2505: —
- Gemma 3 12B: 45.9 (#160)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| LMArena Non-English | — | 1318 |
| LMArena German | — | 1370 |
| LMArena Russian | — | 1335 |

## Instruction Following

- Devstral Small 2505: —
- Gemma 3 12B: 68.8 (#179)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| LMArena Instruction Following | — | 1299 |

## Long Context

- Devstral Small 2505: —
- Gemma 3 12B: 40.0 (#157)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| LMArena Longer Query | — | 1317 |

## Writing & Preference

- Devstral Small 2505: —
- Gemma 3 12B: 47.7 (#205)

| Benchmark | Devstral Small 2505 | Gemma 3 12B |
|---|---|---|
| LMArena Text | — | 1334 |
| LMArena Creative Writing | — | 1331 |
| EQ-Bench Creative Writing | — | 1126 |
| LMArena Multi-Turn | — | 1334 |

## FAQ

### Is Devstral Small 2505 better than Gemma 3 12B?

Devstral Small 2505 is the stronger model overall, scoring 33.9 to 31.8 on the Noometry Index. Gemma 3 12B costs 2.0× 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 Gemma 3 12B?

Gemma 3 12B is cheaper. It lists at $0.05 per million input tokens and $0.15 per million output tokens; Devstral Small 2505 lists at $0.10 and $0.30.

### Is Devstral Small 2505 or Gemma 3 12B better for coding?

Devstral Small 2505 scores higher on coding benchmarks: 38.6 versus 31.2 in the Noometry coding category.

### Which has the bigger context window?

Gemma 3 12B does, with 131K tokens against 128K.

### How many benchmarks do Devstral Small 2505 and Gemma 3 12B share?

2 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Gemma 3 12B has 24.