Model comparison
Claude Opus 5.5 vs Mistral
Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 29.9 on the Noometry Index.
Last verified . 14 shared benchmarks.
Mistral AISummary
- They share 14 benchmarks with published results for both. Claude Opus 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 Opus 5.5 leads 91.8 to 22.3.
Side by side
| Claude Opus 5.5 | Mistral | |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 68.6 | 29.9 |
| Released | 2026-09-22 | — |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $4 | — |
| Output $ / M tokens | $20 | — |
| Results tracked | 44 | 22 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Opus 5.5 leads
Claude Opus 5.5: 71.9 (#3), Mistral: 33.8 (#250)
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Coding | 1547 | 1162 |
| FrontierCode | 54.6% | — |
| CursorBench | 57.8% | — |
| LMArena WebDev | 1813 | — |
| FrontierSWE | 62.3% | — |
| SciCode | 66.9% | — |
| MirrorCode | 77.4% | — |
| ALE-Bench | 2,147 | — |
Agentic & Tool Use Not comparable
Claude Opus 5.5: 45.3 (#15), Mistral: —
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| APEX-Agents | 73.5% | — |
| GDP.pdf | 30.6% | — |
| Vending-Bench 2 | 9,235 | — |
Reasoning Claude Opus 5.5 leads
Claude Opus 5.5: 80.2 (#3), Mistral: 22.2 (#200)
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Hard Prompts | 1535 | 1149 |
| ARC-AGI-2 | 93.3% | — |
| NYT Connections (extended) | 88.5% | — |
| ARC-AGI-1 | 98.5% | — |
| CritPt | 31.7% | — |
| EBR-Bench | 71.4% | — |
| Mystery Game Puzzles | 71% | — |
| DTBench | 98.9% | — |
| LMCA | 68.2% | — |
| Epoch Capabilities Index | 167.33 | — |
Math Claude Opus 5.5 leads
Claude Opus 5.5: 91.8 (#3), Mistral: 22.3 (#278)
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Math | 1506 | 1180 |
| FrontierMath (Tiers 1-3) | 91.2% | — |
| FrontierMath Tier 4 | 95% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| Omni-MATH | — | 7.2% |
| FrontierMath Erdős | 2.9% | — |
Knowledge Claude Opus 5.5 leads
Claude Opus 5.5: 66.4 (#10), Mistral: 16.6 (#288)
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Expert | 1547 | 1125 |
| GPQA Diamond | 90.6% | — |
| SimpleQA Verified | 72.2% | — |
| MMLU-Pro | — | 27.7% |
| GPQA (HELM) | — | 30.3% |
Multimodal Not comparable
Claude Opus 5.5: 57.8 (#1), Mistral: —
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Vision | 1321 | — |
| Blueprint-Bench 2 | 51.2% | — |
| Furniture Assembly | 83.3% | — |
Multilingual Claude Opus 5.5 leads
Claude Opus 5.5: 59.1 (#2), Mistral: 32.8 (#254)
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Non-English | 1507 | 1129 |
| LMArena Chinese | 1588 | 1109 |
| LMArena French | 1514 | 1180 |
| LMArena Russian | 1520 | 1168 |
| LMArena Spanish | 1507 | 1143 |
| LMArena German | — | 1155 |
| LMArena Japanese | — | 1013 |
| LMArena Korean | — | 1032 |
Instruction Following Claude Opus 5.5 leads
Claude Opus 5.5: 80.0 (#3), Mistral: 52.6 (#288)
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Instruction Following | 1537 | 1152 |
| IFEval | — | 56.8% |
Long Context Claude Opus 5.5 leads
Claude Opus 5.5: 47.1 (#19), Mistral: 35.0 (#245)
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Longer Query | 1532 | 1153 |
Writing & Preference Claude Opus 5.5 leads
Claude Opus 5.5: 78.2 (#3), Mistral: 37.0 (#260)
| Benchmark | Claude Opus 5.5 | Mistral |
|---|---|---|
| LMArena Text | 1515 | 1165 |
| LMArena Creative Writing | 1533 | 1158 |
| LMArena Multi-Turn | 1499 | 1147 |
| EQ-Bench Creative Writing | 2050 | — |
| WildBench | — | 66% |
Frequently asked questions
Is Claude Opus 5.5 better than Mistral?
Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 29.9 on the Noometry Index.
Is Claude Opus 5.5 or Mistral better for coding?
Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 33.8 in the Noometry coding category.
How many benchmarks do Claude Opus 5.5 and Mistral share?
14 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Mistral has 22.