Kimi K2.7 CodevsGrok Code Fast 1
Kimi K2.7 Code | Grok Code Fast 1 | |
|---|---|---|
| Specifications | ||
ParametersA rough measure of how big the model is. More parameters usually means more capable and more expensive to run, though it is a poor guide on its own — a smaller, newer model often beats a larger, older one. | 1T | — |
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | 256k | — |
| API pricingUSD per 1M tokens · lower wins · base tier | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $0.95 | $1.00 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | $4.00 | $2.00 |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | $0.19 | $0.20 |
| Benchmarks | ||
Arena Elo (Code)Community preference (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 | 1163 |
| BenchmarksPublished by one model only | ||
CursorBench v3.2Agentic coding — Cursor's own test of harder, real-world coding tasks inside a code editor, on the refreshed v3.2 task set. Scores aren't comparable with v3.1. Higher is better. | 49.7% | — |
DeepSWE 1.1Agentic coding — Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | 31% | — |
Next.js EvalsNext.js coding — Vercel'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% | — |
| Overview | ||
| Company | Moonshot AI | SpaceXAI |
| Release date | Jun 12 2026 | Aug 28 2025 |
| Access | Open Weight | Proprietary |
Frequently asked questions
Kimi K2.7 Code leads Grok Code Fast 1 on 1 of the 1 benchmark they both report (Arena Elo (Code)). Kimi K2.7 Code is cheaper on input: $0.95 vs $1.00 per million tokens. Grok Code Fast 1 is cheaper on output: $2.00 vs $4.00 per million tokens. Figures are base-tier rates. Grok Code Fast 1 shipped 288 days before Kimi K2.7 Code, so benchmark comparisons should account for the intervening progress.
Kimi K2.7 Code is open weight, while Grok Code Fast 1 is proprietary.
On Arena Elo (Code), Kimi K2.7 Code leads at 1469 vs Grok Code Fast 1 at 1163.
Kimi K2.7 Code was released by Moonshot AI on Jun 12 2026.
Grok Code Fast 1 was released by SpaceXAI on Aug 28 2025.
Kimi K2.7 Code is cheaper on input: $0.95 vs $1.00 per million tokens. Grok Code Fast 1 is cheaper on output: $2.00 vs $4.00 per million tokens. Figures are base-tier rates. Rates are pay-as-you-go API prices verified on August 18, 2026.
Kimi K2.7 Code is an open weight model released by Moonshot AI. Grok Code Fast 1 is a proprietary model released by SpaceXAI.