Kimi K2 Thinking vs Grok Code Fast 1
Moonshot AI Kimi K2 Thinking | SpaceXAI Grok Code Fast 1 | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | SpaceXAI |
| Release date | Nov 6 2025 | Aug 28 2025 |
| Access | Open Weight | Proprietary |
| Specifications | ||
Parameters | 1T | — |
Context window | 256k | — |
| Benchmarks | ||
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 71.3% | — |
| Timeline | ||
| Release gap | Grok Code Fast 1 shipped 70 days before Kimi K2 Thinking | |
Which is better: Kimi K2 Thinking or Grok Code Fast 1?
Kimi K2 Thinking and Grok Code Fast 1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok Code Fast 1 shipped 70 days before Kimi K2 Thinking, so benchmark comparisons should account for the intervening progress.
Kimi K2 Thinking is open weight, while Grok Code Fast 1 is proprietary.
Direct benchmark comparisons are unavailable — Kimi K2 Thinking and Grok Code Fast 1 don't publish scores on any of the same benchmarks.
Frequently asked questions
Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.
Grok Code Fast 1 was released by SpaceXAI on Aug 28 2025.
Kimi K2 Thinking is an open weight model released by Moonshot AI. Grok Code Fast 1 is a proprietary model released by SpaceXAI.
Other comparisons
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