DeepSeek · Shipped

DeepSeek-V4.1-Flash release date

Specs, benchmarks and changelog are on the DeepSeek-V4.1-Flash model card at TPS.

First uncensored version on Hugging Face: s-zaizen/DeepSeek-V4.1-Flash-Abliterated, 0 days after release. 120 uncensored versions in total.

Released

Sep 10, 2026

What we know

Smallest model in DeepSeek's new V4 architecture family, with native multimodal visual understanding, now callable on the DeepSeek API as deepseek-flash. The changelog states no parameter count, context window, or weight availability.

Spec

Params: 552B
Active: Not stated
Context: 1M
Weights: MIT
Modality: Not stated
Codename: Not stated

Every claim

9 from 5 sources

DeepSeek API UpdatesFrom the labOct 30
DeepSeek's changelog says V4.1 Flash was upgraded to DeepSeek-V4.1-Flash-1017 and is accessed via deepseek-flash.
points at Oct 17exact datesource
OpenRouter catalogSpotted in the wildOct 17
OpenRouter's catalog lists DeepSeek V4.1 Flash 1017 as routable as of 2026-10-17, served under the deepseek-flash API name.
points at Oct 17exact datesource
deepseek-aiSpotted in the wildOct 17
A Hugging Face repository named DeepSeek-V4.1-Flash-1017 is published under deepseek-ai, indicating the model is publicly available as of the document date.
points at Oct 17exact datesource
DeepSeek API UpdatesFrom the labSep 10
DeepSeek officially released DeepSeek-V4.1-Flash model with native multimodal visual understanding and higher capability ceiling.
points at Sep 10exact datesource
OpenRouter catalogSpotted in the wildSep 10
DeepSeek V4.1 Flash is routable on OpenRouter, sparse MoE model that exceeds V4 Pro performance.
no date givenno datesource
Hacker News (AI front page)Spotted in the wildSep 10
DeepSeek-V4.1-Flash model released and available on Hugging Face.
no date givenno datesource
TechmemeFrom the labSep 10
DeepSeek launched DeepSeek-V4.1-Flash, a 552B-parameter model with 1M-token context built on Causal Encoder-Decoder architecture.
points at Sep 10exact datesource
OpenRouter catalogSpotted in the wildSep 10
DeepSeek V4.1 Flash is now available on OpenRouter, a sparse MoE model using the company's CED architecture.
no date givenno datesource
deepseek-aiSpotted in the wildSep 10
Hugging Face repo deepseek-ai/DeepSeek-V4.1-Flash is publicly listed as a live model, but the page gives no release date.
no date givenno datesource

Official announcement