Claude Opus 4 vs Codestral Mamba 7B
Anthropic Claude Opus 4 | Mistral Codestral Mamba 7B | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Mistral |
| Release date | May 22 2025 | Jul 16 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. | 34% | — |
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. | 72.5% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 79.6% | — |
| Timeline | ||
| Release gap | Codestral Mamba 7B shipped 310 days before Claude Opus 4 | |
Which is better: Claude Opus 4 or Codestral Mamba 7B?
Claude Opus 4 and Codestral Mamba 7B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Codestral Mamba 7B shipped 310 days before Claude Opus 4, so benchmark comparisons should account for the intervening progress.
Claude Opus 4 is proprietary, while Codestral Mamba 7B is open weight.
Direct benchmark comparisons are unavailable — Claude Opus 4 and Codestral Mamba 7B don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude Opus 4 was released by Anthropic on May 22 2025.
Codestral Mamba 7B was released by Mistral on Jul 16 2024.
Claude Opus 4 is a proprietary model released by Anthropic. Codestral Mamba 7B is an open weight model released by Mistral.
Other comparisons
Claude Opus 4 vs GPT-5.6 SolCodestral Mamba 7B vs GPT-5.6 SolClaude Opus 4 vs Gemini OmniCodestral Mamba 7B vs Gemini OmniClaude Opus 4 vs Muse Spark 1.1Codestral Mamba 7B vs Muse Spark 1.1Claude Opus 4 vs Grok 4.5Codestral Mamba 7B vs Grok 4.5Claude Opus 4 vs DeepSeek-V4-ProCodestral Mamba 7B vs DeepSeek-V4-ProClaude Opus 4 vs Kimi K2.7 CodeCodestral Mamba 7B vs Kimi K2.7 Code