DeepSeek V4 narrows closed-model gap

The prediction is aggressive, but the underlying trend is real: DeepSeek is shipping frontier-style capability with open weights, which keeps tightening the gap between open and closed models.

• –Official docs date the release to April 24, 2026, and describe V4-Pro at 1.6T total params / 49B active, plus V4-Flash at 284B total / 13B active.
• –The technical center of gravity is long context and agent work: DeepSeek calls out token-wise compression, sparse attention, and a 1M-token context window.
• –DeepSeek and Xinhua both frame V4 as strong in programming, world knowledge, reasoning, and agentic coding, though not an outright win over the best closed models.
• –For developers, the real shift is cost-performance and accessibility: open-weight frontier models are looking more viable for serious production use, not just experimentation.