Claude Sonnet 4.5 vs Mixtral 8×22B
Anthropic Claude Sonnet 4.5 | Mistral Mixtral 8×22B | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Mistral |
| Release date | Sep 29 2025 | Apr 10 2024 |
| Access | Proprietary | Open Weight |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 79% | — |
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 77.2% | — |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | 50% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 83.4% | — |
Multimodal MMMUTests the AI on understanding images and text together across many college subjects. Higher is better. | 68% | — |
| Timeline | ||
| Release gap | Mixtral 8×22B shipped 537 days before Claude Sonnet 4.5 | |
Which is better: Claude Sonnet 4.5 or Mixtral 8×22B?
Claude Sonnet 4.5 and Mixtral 8×22B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mixtral 8×22B shipped 537 days before Claude Sonnet 4.5, so benchmark comparisons should account for the intervening progress.
Claude Sonnet 4.5 is proprietary, while Mixtral 8×22B is open weight.
Direct benchmark comparisons are unavailable — Claude Sonnet 4.5 and Mixtral 8×22B don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude Sonnet 4.5 was released by Anthropic on Sep 29 2025.
Mixtral 8×22B was released by Mistral on Apr 10 2024.
Claude Sonnet 4.5 is a proprietary model released by Anthropic. Mixtral 8×22B is an open weight model released by Mistral.
Other comparisons
Claude Sonnet 4.5 vs GPT-5.6 SolMixtral 8×22B vs GPT-5.6 SolClaude Sonnet 4.5 vs Gemini OmniMixtral 8×22B vs Gemini OmniClaude Sonnet 4.5 vs Muse Spark 1.1Mixtral 8×22B vs Muse Spark 1.1Claude Sonnet 4.5 vs Grok 4.5Mixtral 8×22B vs Grok 4.5Claude Sonnet 4.5 vs DeepSeek-V4-ProMixtral 8×22B vs DeepSeek-V4-ProClaude Sonnet 4.5 vs Kimi K2.7 CodeMixtral 8×22B vs Kimi K2.7 Code