DeepSeek launching v4.1 flash cheaper and more capable than v4 pro

DeepSeek will launch the V4.1 Flash model on September 10 2026 (Beijing Time), positioning it as cheaper and more capable than the current V4 Pro across performance, cost, speed, and task completion metrics. After launch, all V4 Pro requests will be redirected to V4.1 Flash and billed at Flash rates, with off-peak pricing set at $0.003 per input cache hit, $0.15 per miss, and $0.6 per output, while peak-hour rates will be double.