DeepSeek: R1 0528

DeepSeekID: 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 in an inference pass. Fully open-source model.

Pricing per 1M Tokens

Input (Prompt)$0.45
Output (Completion)$2.15
Cache Read$0.22
Cache WriteFree
ImageN/A

Specifications

Context Length164K
Max Output Tokens66K
Input ModalitiesText
Output ModalitiesText
TokenizerDeepSeek
Instruct Typedeepseek-r1
Top Provider Context164K
Top Provider Max Output66K
ModeratedNo

Compare this model

See how DeepSeek: R1 0528 stacks up against other models.

vs DeepSeek: DeepSeek V3.2 Specialevs DeepSeek: DeepSeek V3.2vs DeepSeek: DeepSeek V3.2 Expvs DeepSeek: DeepSeek V3.1 Terminusvs DeepSeek: DeepSeek V3.1

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DeepSeek: DeepSeek V3.2 Exp
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DeepSeek: DeepSeek V3.1 Terminus
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DeepSeek: DeepSeek V3.1
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Last updated: March 23, 2026

First tracked: March 23, 2026