Following an intensive iteration period that began in April, DeepSeek is preparing to move its fourth-generation models into full production. The official launch is scheduled for mid-July, transitioning the ecosystem from a preview phase to a deployable, production-ready environment.
Pro vs Flash: Tailored Performance
The DeepSeek V4 family consists of two primary variants. The V4-Pro, boasting 1.6 trillion parameters, is engineered for maximum capability and top-tier reasoning. Meanwhile, the V4-Flash model, with 284 billion parameters, focuses on speed and cost-efficiency. Internal production data reveals that the DSpark framework has boosted per-user generation speeds by 57% to 85% compared to the MTP-1 baseline.Breaking the Context Barrier
A standout feature of V4 is its 1-million-token context window, now the default across all official services. This allows users to process massive datasets, such as entire code repositories or extensive legal documents, within a single prompt. This is made possible by a new sparse attention architecture and hybrid design that optimizes memory usage without compromising reasoning quality.API Migration and Peak-Valley Pricing
The official rollout introduces a strategic shift in monetization. DeepSeek will implement peak-valley pricing, where API costs double during high-demand windows (9:00–12:00 and 14:00–18:00 Beijing time) to ensure service stability.Developers must also prepare for a mandatory migration. Legacy model names, including deepseek-chat and deepseek-reasoner, will be retired on July 24, 2026. Users are urged to switch to the deepseek-v4-pro or deepseek-v4-flash endpoints to maintain operational continuity.