DeepSeek: R1 0528 (free)

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.

Providers for R1 0528 (free)

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Apps using R1 0528 (free)

Top public apps this week using this model

Recent activity on R1 0528 (free)

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Uptime stats for R1 0528 (free)

Uptime stats for R1 0528 (free) across all providers

Sample code and API for R1 0528 (free)

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 300+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.