DeepSeek-V4.1-Flash
DeepSeek-V4.1-Flash is the smallest model in DeepSeek's new architecture family, with native multimodal visual understanding. It is a 552B-parameter MoE model built on the new Causal-Encoder-Decoder architecture, with asymmetric input and output: only 8B parameters are activated for input and 16B for output, at a cost well below other known models of the same size. The new architecture sharply compresses the KV cache, cutting HBM requirements to 1/4 and SSD requirements to 1/8 of the previous generation, which lowers the cost of agent workloads where cache-hit charges make up a large share. The model supports a 1M context window and up to 384K output tokens; thinking mode is on by default, with three effort levels (low, high and max) to match task complexity.
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