Claude Haiku 4.5 vs Codestral Mamba 7B
Anthropic Claude Haiku 4.5 | Mistral Codestral Mamba 7B | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Mistral |
| Release date | Oct 15 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. | 77% | — |
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. | 73.3% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 73% | — |
| Timeline | ||
| Release gap | Codestral Mamba 7B shipped 456 days before Claude Haiku 4.5 | |
Which is better: Claude Haiku 4.5 or Codestral Mamba 7B?
Claude Haiku 4.5 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 456 days before Claude Haiku 4.5, so benchmark comparisons should account for the intervening progress.
Claude Haiku 4.5 is proprietary, while Codestral Mamba 7B is open weight.
Direct benchmark comparisons are unavailable — Claude Haiku 4.5 and Codestral Mamba 7B don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude Haiku 4.5 was released by Anthropic on Oct 15 2025.
Codestral Mamba 7B was released by Mistral on Jul 16 2024.
Claude Haiku 4.5 is a proprietary model released by Anthropic. Codestral Mamba 7B is an open weight model released by Mistral.
Other comparisons
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