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Editorial illustration: DeepSeek V4.1 Flash, MIT weights, one million token context

AINew release

DeepSeek V4.1 Flash (DeepSeek): 890 bytes of cache per token

DeepSeek published V4.1-Flash on 10 September 2026 under an MIT licence: a 552B multimodal mixture of experts that activates 8B parameters reading a prompt and 16B writing an answer, holds a million tokens of context, and keeps its global KV cache to 890 bytes per token.

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