April 24, 2026 — DeepSeek released a preview of V4, its next flagship model family, continuing the rapid pace of open-weight releases that has narrowed the gap with closed frontier labs.
What happened
DeepSeek’s V4 preview introduced two variants that later shipped in full: V4-Pro, a roughly 1.6-trillion-parameter mixture-of-experts model, and the smaller, faster V4-Flash, both sharing a 1-million-token context window and released with open weights.
Why it matters
Continued frontier-class releases from open-weight developers give enterprises and governments outside the small group of US frontier labs a credible self-hostable alternative, which changes data-residency and vendor-lock-in calculations for regulated industries.
Security and infrastructure impact
Security teams evaluating open-weight models for self-hosted or air-gapped use still need independent red-teaming and supply-chain review of model weights and inference stacks, since open availability does not by itself substitute for a formal security assessment.
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