DeepSeek ships V4 Pro, its largest open-weight model yet

DeepSeek released the general-availability version of V4 Pro on OpenRouter, a mixture-of-experts model with a 1-million-token context window. The company reports large gains over the preview version on agentic coding and terminal-use benchmarks, and it is now the largest openly available model, surpassing Kimi K2.6 and GLM-5.1.

Why it matters: This keeps the open-weight frontier moving fast and cheap, pressuring closed-model providers on price for agentic and coding workloads. It extends the pattern set by DeepSeek's earlier V3.2 and V4-preview releases of shipping near-frontier capability at a fraction of typical API cost.