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DeepSeek V4.1-Flash model ships 1M context with extreme KV compression

DeepSeek-V4.1-Flash Ships Causal Encoder–Decoder MoE With 1M Context and Extreme KV Compression

Why we picked it

This matters for developers and researchers working with large-scale text data, as it significantly reduces memory requirements for long-form processing.

DeepSeek's V4.1-Flash model uses a 552B causal encoder-decoder MoE structure. It supports a 1M token context length and achieves extreme KV cache compression with CSA2+FP4 technology, reducing per-token memory usage to about 890 bytes.

Original · pandaily

DeepSeek-V4.1-Flash Ships Causal Encoder–Decoder MoE With 1M Context and Extreme KV Compression

DeepSeek’s V4.1-Flash pairs a 552B Causal Encoder–Decoder MoE with 1M context, CSA2+FP4 KV at ~890 bytes/token, and API access as deepseek-flash.