I know people don't like Twitter links here but the main link just goes to their main docs site generic 'getting started' page.

The website now has a link to the announcement on Twitter here https://x.com/deepseek_ai/status/2047516922263285776

Copying text of that below

DeepSeek-V4 Preview is officially live & open-sourced! Welcome to the era of cost-effective 1M context length.

DeepSeek-V4-Pro: 1.6T total / 49B active params. Performance rivaling the world's top closed-source models.

DeepSeek-V4-Flash: 284B total / 13B active params. Your fast, efficient, and economical choice.

Try it now at http://chat.deepseek.com via Expert Mode / Instant Mode. API is updated & available today!

Tech Report: https://huggingface.co/deepseek-ai/DeepSeek-V4-Pro/blob/main...

Open Weights: https://huggingface.co/collections/deepseek-ai/deepseek-v4