Kimi-Dev vs GPT-5
Moonshot AI Kimi-Dev | OpenAI GPT-5 | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | OpenAI |
| Release date | Jun 2025 | Aug 7 2025 |
| Access | Open Weight | Proprietary |
| Specifications | ||
Parameters | 72B | — |
| 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. | — | 21% |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1394 |
| Timeline | ||
| Release gap | Kimi-Dev shipped 67 days before GPT-5 | |
Which is better: Kimi-Dev or GPT-5?
Kimi-Dev and GPT-5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi-Dev shipped 67 days before GPT-5, so benchmark comparisons should account for the intervening progress.
Kimi-Dev is open weight, while GPT-5 is proprietary.
Direct benchmark comparisons are unavailable — Kimi-Dev and GPT-5 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 was released by OpenAI on Aug 7 2025.
Kimi-Dev is an open weight model released by Moonshot AI. GPT-5 is a proprietary model released by OpenAI.