DeepSeek promises its new AI model has 'world-class' reasoning

DeepSeek launched two new open-source AI models, V4 Pro and V4 Flash.

The company says V4 Pro targets higher capability, while V4 Flash is optimized for speed.

DeepSeek claims both models improve reasoning, agentic tasks, and long-context performance.

The release adds another open-source rival in advanced AI, with comparisons to GPT-5.5 and Gemini-3.1-Pro.

The launch also renews scrutiny in the US and other markets over security and privacy concerns.