# Devstral Small 2505 vs Qwen3.5-9B

> Devstral Small 2505 and Qwen3.5-9B score almost the same on the Noometry Index (34.3 vs 33.8), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/devstral-small-vs-qwen3-5-9b
- Last updated: 2026-10-11
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Devstral Small 2505 scores higher in 1 category and Qwen3.5-9B in 1 category; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Qwen3.5-9B leads 23.1 to 19.7.
- Qwen3.5-9B is cheaper at $0.10 / $0.15 per million input/output tokens, against $0.10 / $0.30 for Devstral Small 2505.
- Qwen3.5-9B accepts more context: 262K tokens versus 128K.

## Snapshot

| | Devstral Small 2505 | Qwen3.5-9B |
|---|---|---|
| Provider | Mistral AI | Alibaba (Qwen) |
| Noometry Index | 34.3 | 33.8 |
| Rank | 233 | 236 |
| Context | 128K | 262K |
| Input $/M | $0.10 | $0.10 |
| Output $/M | $0.30 | $0.15 |
| Weights | Open | Open |

## Coding

- Devstral Small 2505: 38.9 (#166)
- Qwen3.5-9B: 35.9 (#217)

| Benchmark | Devstral Small 2505 | Qwen3.5-9B |
|---|---|---|
| SciCode | 28.8% | 27.5% |
| SWE-bench Verified (bash only) | 56.4% | — |

## Agentic & Tool Use

- Devstral Small 2505: —
- Qwen3.5-9B: 14.5 (#151)

| Benchmark | Devstral Small 2505 | Qwen3.5-9B |
|---|---|---|
| Terminal-Bench | — | 9.2% |

## Reasoning

- Devstral Small 2505: 19.7 (#252)
- Qwen3.5-9B: 23.1 (#182)

| Benchmark | Devstral Small 2505 | Qwen3.5-9B |
|---|---|---|
| CritPt | 0% | 0.3% |
| Kagi LLM Benchmark | 37.7% | — |
| Chess Puzzles | — | 12% |
| DTBench | — | 71.2% |
| LMCA | — | 24.5% |
| Epoch Capabilities Index | — | 139.46 |

## Math

- Devstral Small 2505: —
- Qwen3.5-9B: 34.8 (#192)

| Benchmark | Devstral Small 2505 | Qwen3.5-9B |
|---|---|---|
| MathArena Final-Answer Competitions | — | 48.5% |
| OTIS Mock AIME 2024-2025 | — | 61.7% |

## Knowledge

- Devstral Small 2505: —
- Qwen3.5-9B: 46.0 (#84)

| Benchmark | Devstral Small 2505 | Qwen3.5-9B |
|---|---|---|
| GPQA Diamond | — | 79% |

## FAQ

### Is Devstral Small 2505 better than Qwen3.5-9B?

Devstral Small 2505 and Qwen3.5-9B score almost the same on the Noometry Index (34.3 vs 33.8), so choose on price, context window or the category you care about most.

### Which is cheaper, Devstral Small 2505 or Qwen3.5-9B?

Qwen3.5-9B is cheaper. It lists at $0.10 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 Qwen3.5-9B better for coding?

Devstral Small 2505 scores higher on coding benchmarks: 38.9 versus 35.9 in the Noometry coding category.

### Which has the bigger context window?

Qwen3.5-9B does, with 262K tokens against 128K.

### How many benchmarks do Devstral Small 2505 and Qwen3.5-9B share?

2 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Qwen3.5-9B has 10.