DeepSeek-V4.1-Flash

DeepSeek-V4.1-Flash is DeepSeek's latest multimodal MoE model with 552B backbone parameters. Built on a Causal Encoder-Decoder architecture, it activates only ~8B parameters during prefill and ~16B during decode, delivering flagship-level intelligence at significantly lower inference cost. The model natively understands images, supports a 1M-token context window. It outperforms DeepSeek-V4-Pro across coding, agentic and automation benchmarks, while reducing the KV cache footprint by roughly 4x versus its predecessor.