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DeepSeek-V4.1-Flash Release 2026/09/10
DeepSeek-V4.1-Flash now live with lower API prices and reduced memory requirements.
DeepSeek released V4.1-Flash, a 552B-parameter MoE model with a new Causal Encoder–Decoder architecture (8B active input, 16B active output parameters) and native visual understanding.
The model is now live on the DeepSeek API, with V4-Flash and V4-Flash-Vision-Exp retired and V4-Pro being phased out.
New pricing takes effect at 04:00 UTC on Sept 10, 2026.
From the source
🔹 Introducing DeepSeek-V4.1-Flash: smarter, faster, more efficient. 🔹 552B-parameter MoE. 🔹 New Causal Encoder–Decoder architecture: just 8B active parameters for input, 16B for output. 🔹 V4.1-Flash is now live on the DeepSeek API with native multimodal support. 🔹 V4-Flash & V4-Flash-Vision-Exp are retired. 🔹 We're phasing out V4-Pro. 🔹 New pricing takes effect at 04:00 UTC on Sept 10, 2026.
deepseek.com
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