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DeepSeek: R1 0528 (free)Free variant

deepseek/deepseek-r1-0528:free

Created May 28, 2025163,840 context
$0/M input tokens$0/M output tokens

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 (free)

Total usage per day on OpenRouter

Prompt
657M
Reasoning
57.5M
Completion
33.8M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.