Model comparison
Claude Sonnet 5.5 vs Mistral
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 29.9 on the Noometry Index.
Last verified . 12 shared benchmarks.
Mistral AISummary
- They share 12 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 8 categories and Mistral in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 22.3.
Side by side
| Claude Sonnet 5.5 | Mistral | |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 61.9 | 29.9 |
| Released | 2026-09-28 | — |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 32 | 22 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 67.3 (#6), Mistral: 33.8 (#250)
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Coding | 1513 | 1162 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 45.0 (#16), Mistral: —
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 54.0 (#28), Mistral: 22.2 (#200)
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Hard Prompts | 1495 | 1149 |
| NYT Connections (extended) | 80.5% | — |
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
| Epoch Capabilities Index | 165.03 | — |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 87.9 (#6), Mistral: 22.3 (#278)
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Math | 1510 | 1180 |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| Omni-MATH | — | 7.2% |
| FrontierMath Erdős | 2.9% | — |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#12), Mistral: 16.6 (#288)
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Expert | 1540 | 1125 |
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
| MMLU-Pro | — | 27.7% |
| GPQA (HELM) | — | 30.3% |
Multimodal Not comparable
Claude Sonnet 5.5: 51.5 (#6), Mistral: —
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Vision | 1289 | — |
| Furniture Assembly | 75% | — |
Multilingual Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 55.3 (#30), Mistral: 32.8 (#254)
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Non-English | 1452 | 1129 |
| LMArena Chinese | 1522 | 1109 |
| LMArena Russian | 1451 | 1168 |
| LMArena French | — | 1180 |
| LMArena German | — | 1155 |
| LMArena Japanese | — | 1013 |
| LMArena Korean | — | 1032 |
| LMArena Spanish | — | 1143 |
Instruction Following Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 78.3 (#11), Mistral: 52.6 (#288)
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Instruction Following | 1495 | 1152 |
| IFEval | — | 56.8% |
Long Context Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.9 (#28), Mistral: 35.0 (#245)
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Longer Query | 1498 | 1153 |
Writing & Preference Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#40), Mistral: 37.0 (#260)
| Benchmark | Claude Sonnet 5.5 | Mistral |
|---|---|---|
| LMArena Text | 1471 | 1165 |
| LMArena Creative Writing | 1465 | 1158 |
| LMArena Multi-Turn | 1474 | 1147 |
| WildBench | — | 66% |
Frequently asked questions
Is Claude Sonnet 5.5 better than Mistral?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 29.9 on the Noometry Index.
Is Claude Sonnet 5.5 or Mistral better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 33.8 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5.5 and Mistral share?
12 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Mistral has 22.