R1 0528

deepseek/deepseek-r1-0528

May 28th update to the [original DeepSeek R1](/deepseek/deepseek-r1) Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active...

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Context window: 164K
Input: Text
Output: Text
Released: 2025-05-28

Max output: 33K
Knowledge cutoff: 2024-07
Model parameters: 685B
Active parameters: 37B
Weights: Open
License: mit
Capabilities: Open weight, Reasoning, Structured, Temperature, Tool call

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Arena Text Overall	Blind		LMArena	2026-10-28

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ModelRegistry · Catalog updated 2026-11-05