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DeepSeek V4.1 Flash

At a glance

DeepSeek's cost-efficient V4.1 tier and the first model built on the Causal Encoder-Decoder (CED) architecture: a 552B MoE activating 8B parameters on input and 16B on output.

1.0M ctx$0.03/$0.50 per M
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AI Output
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Benchmarks
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Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Specs
1.0M
Context
256K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$0.03/M tokens
Output$0.50/M tokens
Cache read$0.01/M tokens
Chat with DeepSeek V4.1 FlashGo to model