Kimi K1.5 vs o3
Moonshot AI Kimi K1.5 | OpenAI o3 | |
|---|---|---|
| Overview | ||
| Company | Moonshot AI | OpenAI |
| Release date | Jan 20 2025 | Apr 16 2025 |
| Access | Proprietary | Proprietary |
| Specifications | ||
Context window | 128k | — |
| 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. | — | 26% |
| Timeline | ||
| Release gap | Kimi K1.5 shipped 86 days before o3 | |
Which is better: Kimi K1.5 or o3?
Kimi K1.5 and o3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi K1.5 shipped 86 days before o3, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — Kimi K1.5 and o3 don't publish scores on any of the same benchmarks.
Frequently asked questions
Kimi K1.5 was released by Moonshot AI on Jan 20 2025.
o3 was released by OpenAI on Apr 16 2025.