Kimi-Dev vs GPT-5.1-Codex-Max
Moonshot AI Kimi-Dev | OpenAI GPT-5.1-Codex-Max | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | OpenAI |
| Release date | Jun 2025 | Nov 19 2025 |
| Access | Open Weight | Proprietary |
| Specifications | ||
Parameters | 72B | — |
| Timeline | ||
| Release gap | Kimi-Dev shipped 171 days before GPT-5.1-Codex-Max | |
Which is better: Kimi-Dev or GPT-5.1-Codex-Max?
Kimi-Dev and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi-Dev shipped 171 days before GPT-5.1-Codex-Max, so benchmark comparisons should account for the intervening progress.
Kimi-Dev is open weight, while GPT-5.1-Codex-Max is proprietary.
Direct benchmark comparisons are unavailable — Kimi-Dev and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks.
Frequently asked questions
Kimi-Dev was released by Moonshot AI on Jun 2025.
GPT-5.1-Codex-Max was released by OpenAI on Nov 19 2025.
Kimi-Dev is an open weight model released by Moonshot AI. GPT-5.1-Codex-Max is a proprietary model released by OpenAI.
Other comparisons
Kimi-Dev vs Claude Sonnet 5GPT-5.1-Codex-Max vs Claude Sonnet 5Kimi-Dev vs Gemini OmniGPT-5.1-Codex-Max vs Gemini OmniKimi-Dev vs Muse Spark 1.1GPT-5.1-Codex-Max vs Muse Spark 1.1Kimi-Dev vs Grok 4.5GPT-5.1-Codex-Max vs Grok 4.5Kimi-Dev vs DeepSeek-V4-ProGPT-5.1-Codex-Max vs DeepSeek-V4-ProKimi-Dev vs Mistral Medium 3.5GPT-5.1-Codex-Max vs Mistral Medium 3.5