DeepSeek unveils V4.1 flash model ahead of V4.1 pro launch

DeepSeek announced on September 9, 2026, that it will release the V4.1 Flash model around September 10, 2026, with performance metrics surpassing the V4 Pro. The company stated that the model has been tested internally and externally, showing improvements in speed, cost, and efficiency. DeepSeek also mentioned that during the transition period between the release of V4.1 Flash and V4.1 Pro, all requests for V4 Pro will be redirected to V4.1 Flash, with corresponding pricing. Additionally, the company will adjust Flash series pricing starting at 12:00 on September 10, 2026, with different rates for peak and off-peak hours. A beta version of V4.1 Flash was previously tested, featuring a new model architecture, native multimodal support, and enhanced capabilities at lower costs.