Released May 28, 2025Knowledge cutoff Mar 31, 2025163,840 context
May 28th update to the original DeepSeek R1 Performance on par with OpenAI o1, but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active in an inference pass.
Fully open-source model.
Recent activity on R1 0528
Total usage per day on OpenRouter
Prompt
514M
Reasoning
53.5M
Completion
29.5M
Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.