DeepSeek v4 is now available on the web: How to access and test it

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In a move that has sent ripples through the global AI community, DeepSeek has quietly rolled out a gray-scale test of its highly anticipated V4 model on the web. Leaked interface screenshots reveal a transformative three-mode system - Fast, Expert, and Vision - positioning DeepSeek V4 as a multimodal powerhouse with deep-reasoning capabilities that could rival or surpass leading models like Claude Opus and GPT-5 variants. This isn't just another incremental update.