DeepSeek Plans to Officially Release V4.1 Flash Model Around September 10

Phoenix News — DeepSeek announced on its website on September 9 that it plans to officially release the V4.1 Flash model around September 10, 2026, Beijing time.

According to DeepSeek, internal and external testing showed that V4.1 Flash outperforms V4 Pro on metrics including performance, cost, speed, and total processing time. The company said that after V4.1 Flash goes live and before V4.1 Pro is released, all V4 Pro requests will be redirected to V4.1 Flash and billed at the V4.1 Flash rate, meaning users will pay lower prices during the transition period.