DeepSeek R1-0528 vs Kimi K2 (0905)
DeepSeek DeepSeek R1-0528 | Moonshot AI Kimi K2 (0905) | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | Moonshot AI |
| Release date | May 28 2025 | Sep 5 2025 |
| Access | Open Weight | Open Weight |
| Specifications | ||
Parameters | — | 1T |
Context window | — | 256k |
| 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. | 8% | — |
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 R1-0528 shipped 100 days before Kimi K2 (0905) | |
Which is better: DeepSeek R1-0528 or Kimi K2 (0905)?
DeepSeek R1-0528 and Kimi K2 (0905) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek R1-0528 shipped 100 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 R1-0528 and Kimi K2 (0905) don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek R1-0528 was released by DeepSeek on May 28 2025.
Kimi K2 (0905) was released by Moonshot AI on Sep 5 2025.
Other comparisons
DeepSeek R1-0528 vs Claude Sonnet 5Kimi K2 (0905) vs Claude Sonnet 5DeepSeek R1-0528 vs GPT-5.6 SolKimi K2 (0905) vs GPT-5.6 SolDeepSeek R1-0528 vs Gemini OmniKimi K2 (0905) vs Gemini OmniDeepSeek R1-0528 vs Muse Spark 1.1Kimi K2 (0905) vs Muse Spark 1.1DeepSeek R1-0528 vs Grok 4.5Kimi K2 (0905) vs Grok 4.5DeepSeek R1-0528 vs Mistral Medium 3.5Kimi K2 (0905) vs Mistral Medium 3.5