Kimi K2 Thinking vs o1
Moonshot AI Kimi K2 Thinking | OpenAI o1 | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | OpenAI |
| Release date | Nov 6 2025 | Dec 5 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. | 71.3% | — |
| Timeline | ||
| Release gap | o1 shipped 336 days before Kimi K2 Thinking | |
Which is better: Kimi K2 Thinking or o1?
Kimi K2 Thinking and o1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o1 shipped 336 days before Kimi K2 Thinking, so benchmark comparisons should account for the intervening progress.
Kimi K2 Thinking is open weight, while o1 is proprietary.
Direct benchmark comparisons are unavailable — Kimi K2 Thinking and o1 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.
o1 was released by OpenAI on Dec 5 2024.
Kimi K2 Thinking is an open weight model released by Moonshot AI. o1 is a proprietary model released by OpenAI.
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