Kimi Linear vs GPT-5.4 mini
Moonshot AI Kimi Linear | OpenAI GPT-5.4 mini | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | OpenAI |
| Release date | Oct 2025 | Mar 17 2026 |
| Access | Open Weight | Proprietary |
| Specifications | ||
Parameters | 48B | — |
Context window | — | 400k |
| 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. | — | 32% |
| Timeline | ||
| Release gap | Kimi Linear shipped 167 days before GPT-5.4 mini | |
Which is better: Kimi Linear or GPT-5.4 mini?
Kimi Linear and GPT-5.4 mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi Linear shipped 167 days before GPT-5.4 mini, so benchmark comparisons should account for the intervening progress.
Kimi Linear is open weight, while GPT-5.4 mini is proprietary.
Direct benchmark comparisons are unavailable — Kimi Linear and GPT-5.4 mini don't publish scores on any of the same benchmarks.
Frequently asked questions
Kimi Linear was released by Moonshot AI on Oct 2025.
GPT-5.4 mini was released by OpenAI on Mar 17 2026.
Kimi Linear is an open weight model released by Moonshot AI. GPT-5.4 mini is a proprietary model released by OpenAI.
Other comparisons
Kimi Linear vs Claude Sonnet 5GPT-5.4 mini vs Claude Sonnet 5Kimi Linear vs Gemini 3.5 FlashGPT-5.4 mini vs Gemini 3.5 FlashKimi Linear vs Muse Spark 1.1GPT-5.4 mini vs Muse Spark 1.1Kimi Linear vs Grok 4.5GPT-5.4 mini vs Grok 4.5Kimi Linear vs DeepSeek-V4-ProGPT-5.4 mini vs DeepSeek-V4-ProKimi Linear vs Mistral Medium 3.5GPT-5.4 mini vs Mistral Medium 3.5