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DeepSeek-R1-0528

R1 upgrade (May 28, 2025); enhanced reasoning; system prompt support; improved inference optimization

Deepseek
Released May 28, 2025, DeepSeek-R1-0528 represented a significant upgrade to the original R1 model using the same 671B-parameter V3 base but with substantially advanced post-training and inference optimizations. Key improvements included support for system prompts (removing need for manual `` tags), enhanced reasoning output quality through additional RL training, and optimized inference protocols. The model leveraged more compute during inference while maintaining practical deployment costs, pushing reasoning and problem-solving capabilities further than the original R1. R1-0528 became the preferred production version of the reasoning model for most developers.

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