The Download: DeepSeek’s latest AI breakthrough, and the race to build world models

DeepSeek V4 processes significantly longer context windows than the previous generation, closing a capability gap with frontier Western models.
DeepSeek released a preview of V4 on Friday, its long-awaited flagship model with extended prompt processing capacity, according to MIT Technology Review. The model architecture supports longer input sequences, enabling it to handle more complex tasks that require retaining and reasoning over larger document sets.
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