Kimi K2.7 Code vs GPT-5.4 mini
Moonshot AI Kimi K2.7 Code | OpenAI GPT-5.4 mini | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | OpenAI |
| Release date | Jun 12 2026 | Mar 17 2026 |
| Access | Open Weight | Proprietary |
| Specifications | ||
Parameters | 1T | — |
Context window | 256k | 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% |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | 75% | — |
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. | 1469 | — |
| Timeline | ||
| Release gap | GPT-5.4 mini shipped 87 days before Kimi K2.7 Code | |
Which is better: Kimi K2.7 Code or GPT-5.4 mini?
Kimi K2.7 Code and GPT-5.4 mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5.4 mini shipped 87 days before Kimi K2.7 Code, so benchmark comparisons should account for the intervening progress.
Context windows are 256k (Kimi K2.7 Code) vs 400k (GPT-5.4 mini). Kimi K2.7 Code is open weight, while GPT-5.4 mini is proprietary.
Direct benchmark comparisons are unavailable — Kimi K2.7 Code and GPT-5.4 mini don't publish scores on any of the same benchmarks.
Frequently asked questions
Kimi K2.7 Code was released by Moonshot AI on Jun 12 2026.
GPT-5.4 mini was released by OpenAI on Mar 17 2026.
Kimi K2.7 Code has a 256k context window; GPT-5.4 mini has 400k.
Kimi K2.7 Code is an open weight model released by Moonshot AI. GPT-5.4 mini is a proprietary model released by OpenAI.