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DeepSeek releases V4 preview weights
Downloadable Pro and Flash models extend long-context agent work.
Model labDeepSeek
Release date24 Apr 2026
DeepSeek released preview versions of V4 Pro and Flash with open weights and access through its chat service and API. The family introduced a one-million-token default context and changes intended to support reasoning and agent tasks. DeepSeek
Sources & attribution
- Organizational disclosure 24 Apr 2026DeepSeek releases V4 preview weights
DeepSeek. Original developer announcement.