DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, served by DeepSeek under the `deepseek-flash` API model name. V4.1 Flash is a sparse mixture-of-experts model...
Specs
deepseek/deepseek-r1-0528How to use R1 0528 in your app
The quickest way is through an API gateway such as OpenRouter, which uses the same format as the OpenAI API. Create a key, then send a request with the model ID deepseek/deepseek-r1-0528:
Prefer no code? Many tools in our AI tools directory run on models like this one.
More models from DeepSeek
This model always redirects to the latest model in the DeepSeek Pro family.
This model always redirects to the latest model in the DeepSeek Flash family.
DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture. It activates 8B parameters on input and 16B on...
DeepSeek V4 Flash Vision Exp is an experimental vision-enabled version of [DeepSeek V4 Flash 0731](https://openrouter.ai/deepseek/deepseek-v4-flash-0731) from DeepSeek, adding image understanding while matching the base model on text capabilities including agents,...
DeepSeek V4 Pro 0813 is a large-scale mixture-of-experts model from DeepSeek. This is the GA release of DeepSeek V4 Pro.
This model always redirects to the latest model in the DeepSeek V4 Flash family.
DeepSeek V4 Flash 0731 is a sparse mixture-of-experts model from DeepSeek, with 13B active parameters out of 284B total. This re-post-trained revision is suited for coding, reasoning, and agent workflows....
Questions about R1 0528
What is 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...
How big is the context window of R1 0528?
R1 0528 can read up to 163,840 tokens in one request, roughly 122,880 words.
How much does R1 0528 cost?
Through OpenRouter, R1 0528 costs about $0.50 / 1M tokens for input and $2.15 / 1M tokens for output. Prices change, so check before large jobs.
Is R1 0528 open source?
R1 0528 has open weights, so you can download and run it yourself, subject to its licence.
What can R1 0528 take as input?
R1 0528 accepts text and produces text.
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Specs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 28 May 2025.