Model comparison
Mistral Small 3.1 vs Qwen3.5 Plus
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 31.7 on the Noometry Index. Mistral Small 3.1 costs 2.2× less per token, which makes it the better buy when Qwen3.5 Plus's lead doesn't matter for your workload.
Last verified . 4 shared benchmarks.
Mistral AI
Alibaba (Qwen)Summary
- They share 4 benchmarks with published results for both. Mistral Small 3.1 scores higher in 0 categories and Qwen3.5 Plus in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Qwen3.5 Plus leads 49.6 to 14.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 3.9% for Mistral Small 3.1 and 86.7% for Qwen3.5 Plus.
- Mistral Small 3.1 is cheaper at $0.35 / $0.56 per million input/output tokens, against $0.40 / $2.40 for Qwen3.5 Plus.
- Qwen3.5 Plus accepts more context: 1M tokens versus 128K.
- Mistral Small 3.1 has downloadable open weights; the other is API-only.
Side by side
| Mistral Small 3.1 | Qwen3.5 Plus | |
|---|---|---|
| Provider | Mistral AI | Alibaba (Qwen) |
| Noometry Index | 31.7 | 42.9 |
| Released | 2025-03-17 | 2026-02-16 |
| Weights | Open | Proprietary |
| Context window | 128K | 1M |
| Max output | 102K | 66K |
| Input $ / M tokens | $0.35 | $0.40 |
| Output $ / M tokens | $0.56 | $2.40 |
| Results tracked | 28 | 15 |
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Category by category
Coding Not comparable
Mistral Small 3.1: 38.3 (#179), Qwen3.5 Plus: —
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| LMArena Coding | 1309 | — |
| ALE-Bench | — | 621.92 |
Agentic & Tool Use Not comparable
Mistral Small 3.1: —, Qwen3.5 Plus: —
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| Vending-Bench 2 | — | 0.54 |
Reasoning Qwen3.5 Plus leads
Mistral Small 3.1: 19.7 (#254), Qwen3.5 Plus: 32.8 (#74)
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| Chess Puzzles | 1% | 22% |
| Epoch Capabilities Index | 127.48 | 146.78 |
| LMArena Hard Prompts | 1278 | — |
| Mystery Game Puzzles | — | 17% |
| DTBench | — | 80.5% |
| LMCA | — | 36.4% |
Math Qwen3.5 Plus leads
Mistral Small 3.1: 14.7 (#301), Qwen3.5 Plus: 49.6 (#61)
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 3.9% | 86.7% |
| Omni-MATH | 24.8% | — |
| LMArena Math | 1262 | — |
| FrontierMath (Feb 2025 set) | — | 21% |
| FrontierMath Tier 4 (v1) | — | 2.1% |
Knowledge Qwen3.5 Plus leads
Mistral Small 3.1: 22.6 (#271), Qwen3.5 Plus: 46.0 (#83)
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| GPQA Diamond | 41.9% | 84.8% |
| SimpleQA Verified | — | 25.4% |
| MMLU-Pro | 61% | — |
| Vectara Hallucination Rate | — | 10.7% |
| GPQA (HELM) | 39.2% | — |
| LMArena Expert | 1257 | — |
Multimodal Not comparable
Mistral Small 3.1: 33.2 (#99), Qwen3.5 Plus: —
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| LMArena Vision | 1136 | — |
Multilingual Not comparable
Mistral Small 3.1: 41.2 (#209), Qwen3.5 Plus: —
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| LMArena Non-English | 1255 | — |
| LMArena Chinese | 1253 | — |
| LMArena French | 1273 | — |
| LMArena German | 1266 | — |
| LMArena Japanese | 1208 | — |
| LMArena Korean | 1206 | — |
| LMArena Russian | 1263 | — |
| LMArena Spanish | 1283 | — |
Instruction Following Not comparable
Mistral Small 3.1: 63.6 (#230), Qwen3.5 Plus: —
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| IFEval | 75% | — |
| LMArena Instruction Following | 1264 | — |
Long Context Qwen3.5 Plus leads
Mistral Small 3.1: 39.5 (#178), Qwen3.5 Plus: 43.0 (#113)
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| CL-bench | — | 19.8% |
| CL-bench Life | — | 12.4% |
| LMArena Longer Query | 1299 | — |
Writing & Preference Not comparable
Mistral Small 3.1: 37.0 (#259), Qwen3.5 Plus: —
| Benchmark | Mistral Small 3.1 | Qwen3.5 Plus |
|---|---|---|
| LMArena Text | 1277 | — |
| LMArena Creative Writing | 1253 | — |
| EQ-Bench Creative Writing | 761 | — |
| WildBench | 78.8% | — |
| LMArena Multi-Turn | 1270 | — |
Frequently asked questions
Is Mistral Small 3.1 better than Qwen3.5 Plus?
Qwen3.5 Plus is the stronger model overall, scoring 42.9 to 31.7 on the Noometry Index. Mistral Small 3.1 costs 2.2× less per token, which makes it the better buy when Qwen3.5 Plus's lead doesn't matter for your workload.
Which is cheaper, Mistral Small 3.1 or Qwen3.5 Plus?
Mistral Small 3.1 is cheaper. It lists at $0.35 per million input tokens and $0.56 per million output tokens; Qwen3.5 Plus lists at $0.40 and $2.40.
Which has the bigger context window?
Qwen3.5 Plus does, with 1M tokens against 128K.
How many benchmarks do Mistral Small 3.1 and Qwen3.5 Plus share?
4 benchmarks have published results for both models. Mistral Small 3.1 has 28 scored results on Noometry and Qwen3.5 Plus has 15.