DeepSeek Chat (R1-based) vs Kimi K2 (0905)
DeepSeek DeepSeek Chat (R1-based) | Moonshot AI Kimi K2 (0905) | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | Moonshot AI |
| Release date | Jan 20 2025 | Sep 5 2025 |
| Access | Open Weight | Open Weight |
| 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 | DeepSeek Chat (R1-based) shipped 228 days before Kimi K2 (0905) | |
Which is better: DeepSeek Chat (R1-based) or Kimi K2 (0905)?
DeepSeek Chat (R1-based) and Kimi K2 (0905) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek Chat (R1-based) shipped 228 days before Kimi K2 (0905), 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 — DeepSeek Chat (R1-based) and Kimi K2 (0905) don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek Chat (R1-based) was released by DeepSeek on Jan 20 2025.
Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.
Other comparisons
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