Kimi K2 (0905) vs Grok‑2
Moonshot AI Kimi K2 (0905) | SpaceXAI Grok‑2 | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | SpaceXAI |
| Release date | Sep 5 2025 | Aug 14 2024 |
| 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. | 65.8% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 75.1% | — |
| Timeline | ||
| Release gap | Grok‑2 shipped 387 days before Kimi K2 (0905) | |
Which is better: Kimi K2 (0905) or Grok‑2?
Kimi K2 (0905) and Grok‑2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑2 shipped 387 days before Kimi K2 (0905), so benchmark comparisons should account for the intervening progress.
Kimi K2 (0905) is open weight, while Grok‑2 is proprietary.
Direct benchmark comparisons are unavailable — Kimi K2 (0905) and Grok‑2 don't publish scores on any of the same benchmarks.
Frequently asked questions
Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.
Grok‑2 was released by SpaceXAI on Aug 14 2024.
Kimi K2 (0905) is an open weight model released by Moonshot AI. Grok‑2 is a proprietary model released by SpaceXAI.
Other comparisons
Kimi K2 (0905) vs Claude Sonnet 5Grok‑2 vs Claude Sonnet 5Kimi K2 (0905) vs GPT-5.6 SolGrok‑2 vs GPT-5.6 SolKimi K2 (0905) vs Gemini OmniGrok‑2 vs Gemini OmniKimi K2 (0905) vs Muse Spark 1.1Grok‑2 vs Muse Spark 1.1Kimi K2 (0905) vs DeepSeek-V4-ProGrok‑2 vs DeepSeek-V4-ProKimi K2 (0905) vs Mistral Medium 3.5Grok‑2 vs Mistral Medium 3.5