Model comparison
Claude Sonnet 5.5 vs Mixtral 8x22B
Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 26.7 on the Noometry Index.
Last verified . 1 shared benchmarks.
Mistral AISummary
- They share 1 benchmark with published results for both. Claude Sonnet 5.5 scores higher in 5 categories and Mixtral 8x22B in 0 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 21.2.
- The biggest single-benchmark swing is GPQA Diamond: 95.6% for Claude Sonnet 5.5 and 34.1% for Mixtral 8x22B.
- Mixtral 8x22B is cheaper at $2 / $6 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 64K.
- Mixtral 8x22B has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5.5 | Mixtral 8x22B | |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 60.5 | 26.7 |
| Released | 2026-09-28 | 2024-04-17 |
| Weights | Proprietary | Open |
| Context window | 1M | 64K |
| Max output | 128K | 64K |
| Input $ / M tokens | $2 | $2 |
| Output $ / M tokens | $10 | $6 |
| Results tracked | 16 | 34 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 65.5 (#6), Mixtral 8x22B: 23.8 (#324)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| WeirdML | — | 3.2% |
| BigCodeBench Instruct | — | 40.6% |
| LMArena Coding | — | 1166 |
| BigCodeBench Complete | — | 50.2% |
| ALE-Bench | 1,819 | — |
| HumanEval+ | — | 72% |
| MBPP+ | — | 64.3% |
Agentic & Tool Use Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 44.9 (#14), Mixtral 8x22B: 22.8 (#119)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| APEX-Agents | 75.5% | — |
| Cybench | — | 7.5% |
Reasoning Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 52.4 (#29), Mixtral 8x22B: 19.1 (#246)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| CritPt | 31.4% | — |
| LMArena Hard Prompts | — | 1150 |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 55.1% |
| Epoch Capabilities Index | — | 122 |
| ForecastBench | — | 56.3 |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 88.7 (#4), Mixtral 8x22B: 21.2 (#271)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| Omni-MATH | — | 16.3% |
| LMArena Math | — | 1184 |
| MATH Level 5 | — | 24.2% |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#11), Mixtral 8x22B: 15.1 (#288)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| GPQA Diamond | 95.6% | 34.1% |
| SimpleQA Verified | 46.5% | — |
| MMLU-Pro | — | 46% |
| GPQA (HELM) | — | 33.4% |
| LMArena Expert | — | 1113 |
| MMLU | — | 77.8% |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), Mixtral 8x22B: —
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| Furniture Assembly | 75% | — |
Multilingual Not comparable
Claude Sonnet 5.5: —, Mixtral 8x22B: 32.9 (#250)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| LMArena Non-English | — | 1128 |
| LMArena Chinese | — | 1116 |
| LMArena French | — | 1165 |
| LMArena German | — | 1141 |
| LMArena Japanese | — | 1037 |
| LMArena Korean | — | 1056 |
| LMArena Russian | — | 1158 |
| LMArena Spanish | — | 1150 |
Instruction Following Not comparable
Claude Sonnet 5.5: —, Mixtral 8x22B: 57.9 (#261)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| IFEval | — | 72.4% |
| LMArena Instruction Following | — | 1147 |
Long Context Not comparable
Claude Sonnet 5.5: —, Mixtral 8x22B: 34.6 (#242)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| LMArena Longer Query | — | 1144 |
Writing & Preference Not comparable
Claude Sonnet 5.5: —, Mixtral 8x22B: 37.1 (#257)
| Benchmark | Claude Sonnet 5.5 | Mixtral 8x22B |
|---|---|---|
| LMArena Text | — | 1162 |
| LMArena Creative Writing | — | 1141 |
| WildBench | — | 71.1% |
| LMArena Multi-Turn | — | 1130 |
Frequently asked questions
Is Claude Sonnet 5.5 better than Mixtral 8x22B?
Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 26.7 on the Noometry Index.
Which is cheaper, Claude Sonnet 5.5 or Mixtral 8x22B?
Mixtral 8x22B is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.
Is Claude Sonnet 5.5 or Mixtral 8x22B better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 23.8 in the Noometry coding category.
Which has the bigger context window?
Claude Sonnet 5.5 does, with 1M tokens against 64K.
How many benchmarks do Claude Sonnet 5.5 and Mixtral 8x22B share?
1 benchmark has published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Mixtral 8x22B has 34.