Mixtral 8×7B vs GPT-5-Codex
Mistral Mixtral 8×7B | OpenAI GPT-5-Codex | |
|---|---|---|
| Overview | ||
| Company | Mistral | OpenAI |
| Release date | Dec 8 2023 | Sep 15 2025 |
| Access | Open Weight | Proprietary |
| 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. | — | 39% |
| Timeline | ||
| Release gap | Mixtral 8×7B shipped 647 days before GPT-5-Codex | |
Which is better: Mixtral 8×7B or GPT-5-Codex?
Mixtral 8×7B and GPT-5-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mixtral 8×7B shipped 647 days before GPT-5-Codex, so benchmark comparisons should account for the intervening progress.
Mixtral 8×7B is open weight, while GPT-5-Codex is proprietary.
Direct benchmark comparisons are unavailable — Mixtral 8×7B and GPT-5-Codex don't publish scores on any of the same benchmarks.
Frequently asked questions
Mixtral 8×7B was released by Mistral on Dec 8 2023.
GPT-5-Codex was released by OpenAI on Sep 15 2025.
Mixtral 8×7B is an open weight model released by Mistral. GPT-5-Codex is a proprietary model released by OpenAI.
Other comparisons
Mixtral 8×7B vs Claude Sonnet 5GPT-5-Codex vs Claude Sonnet 5Mixtral 8×7B vs Gemini 3.5 FlashGPT-5-Codex vs Gemini 3.5 FlashMixtral 8×7B vs Muse Spark 1.1GPT-5-Codex vs Muse Spark 1.1Mixtral 8×7B vs Grok 4.5GPT-5-Codex vs Grok 4.5Mixtral 8×7B vs DeepSeek-V4-ProGPT-5-Codex vs DeepSeek-V4-ProMixtral 8×7B vs Kimi K2.7 CodeGPT-5-Codex vs Kimi K2.7 Code