What does DeepSeek V4 actually do?

DeepSeek V4 is a new flagship artificial intelligence model released by Chinese AI firm DeepSeek. It is designed to process very long text prompts efficiently and offers strong performance in coding, reasoning, and general knowledge tasks. It is available in both a larger 'Pro' version and a smaller 'Flash' version.

Is DeepSeek V4 truly open source?

Yes, DeepSeek V4 is released as an open-source model, meaning its code and weights are available for anyone to download, use, and modify, which is a significant departure from many proprietary models from major AI labs.

Will this model replace human lawyers?

While advanced AI models like DeepSeek V4 can assist with tasks like legal research, document analysis, and drafting, they are not currently designed to replace human lawyers. The nuanced judgment, client interaction, and strategic thinking required in legal practice are still firmly in the domain of human professionals.

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DeepSeek V4: Open Source AI That's Actually Affordable

DeepSeek's new V4 model claims to rival top closed-source giants, all while remaining open-source and incredibly cheap. Is this the open-weight revolution we've been waiting for, or just more hype?

Legal AI Beat Apr 25, 2026 5 min read

A stylized graphic representing a large brain or network with glowing connections, symbolizing advanced AI processing.

⚡ Key Takeaways

DeepSeek V4 boasts a massive 1 million token context window, rivaling top proprietary models. 𝕏
The model is open-source, offering a potentially much cheaper alternative to closed-source giants. 𝕏
DeepSeek claims V4-Pro matches performance of models like Claude Opus and GPT-4.6 on key benchmarks. 𝕏
The innovation lies in a new sparse attention mechanism designed for better efficiency with long prompts. 𝕏