DeepSeek has officially launched its V4 Pro model, dropping one of the largest open-weight AI systems ever released into general availability. The model packs 1.6 trillion total parameters and deploys 49 billion of them per token, a scale that puts it in direct competition with the proprietary heavyweights from OpenAI, Google, and Anthropic.
The difference: anyone can use it. V4 Pro ships under an MIT license, which is about as permissive as software licensing gets.
What’s under the hood
DeepSeek-V4-Pro uses a Mixture-of-Experts (MoE) architecture. Think of it like a company with 1.6 trillion employees where only 49 billion show up to work on any given task. The rest stay dormant until their specific expertise is needed.
The model supports a 1 million-token context window.
