DeepSeek · Efficient Multimodal MoE

DeepSeek-V4.1-Flash

Announced 10 September as the smallest model in DeepSeek's new architecture family, with native visual understanding. A 552B mixture-of-experts built on a causal encoder-decoder that activates only 8B parameters for input and 16B for output, cutting KV cache to a quarter of the previous generation's HBM and an eighth of its SSD storage. DeepSeek states it beats its own DeepSeek-V4-Pro on performance, cost, speed and total runtime, without publishing numbers. Live on the API as deepseek-flash, with off-peak pricing at half the peak rate. No benchmark scores, licence or context window stated.