Kimi K1.5vso1-preview
Kimi K1.5 | o1-preview | |
|---|---|---|
| Specifications | ||
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. | 128k | 128k |
| API pricingUSD per 1M tokens · lower wins | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | — | $15.00 |
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. | — | $60.00 |
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. | — | $7.50 |
| BenchmarksPublished by one model only | ||
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 73.3% |
| Overview | ||
| Company | Moonshot AI | OpenAI |
| Release date | Jan 20 2025 | Sep 12 2024 |
| Access | Proprietary | Proprietary |
Other comparisons
Frequently asked questions
Kimi K1.5 and o1-preview don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only o1-preview has a verified first-party API price: $15.00 per million input tokens and $60.00 per million output tokens. No pay-as-you-go API rate is tracked for Kimi K1.5. o1-preview shipped 130 days before Kimi K1.5, so benchmark comparisons should account for the intervening progress.
Context windows are 128k (Kimi K1.5) vs 128k (o1-preview).
Direct benchmark comparisons are unavailable — Kimi K1.5 and o1-preview don't publish scores on any of the same benchmarks.
Kimi K1.5 was released by Moonshot AI on Jan 20 2025.
o1-preview was released by OpenAI on Sep 12 2024.
Only o1-preview has a verified first-party API price: $15.00 per million input tokens and $60.00 per million output tokens. No pay-as-you-go API rate is tracked for Kimi K1.5. Rates are pay-as-you-go API prices verified on August 18, 2026.
Kimi K1.5 has a 128k context window; o1-preview has 128k.