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.
Modalities
Price
Free
Context
164K
Released
May 28, 2025
Knowledge Cutoff
Mar 2025
Token volume and request traffic to this model over time.
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.
Yes. The pricing shown on this page for R1 0528 is zero, so you are not charged for prompt or completion tokens. Free endpoints are rate limited — see the rate limit docs.
R1 0528 has a 163,840 token context window.
DeepSeek V4 Flash Vision Exp, DeepSeek V4 Pro 0813, DeepSeek V4 Flash 0731 and 9 more are other text models from DeepSeek.
R1 0528 was released on May 28, 2025. Its knowledge cutoff is March 31, 2025.