DeepSeek-V4.1-Flash

DeepSeek has quietly swapped the model behind its Flash API and put a price on its own search engine

The deepseek-flash endpoint now serves V4.1-Flash-1017 with no migration step. Free calls through DeepSeek Harness, Claude Code and Codex end on 1 November.

An AI agent solved 49 of 50 unpublished physics problems, and cutting off its internet access cost it three

TheoPhysEval was built from problems working physicists had not published, precisely so no model could have seen them. The best agent missed one, at an average cost of about $2.33 a problem.

The attacker who hit South Korean finance left the agent's own session logs on an open server, and its author is now closing the source

CrowdStrike found the campaign because the operator's session histories, memory files and configuration were exposed in an open directory.

DeepSeek's revenue run rate has passed $1bn after it raised API prices by as much as 4.5 times

Liang Wenfeng told investors the figure has more than doubled in a few months, as the company prepares for a Shanghai listing.

DeepSeek makes V4.1 Flash general and starts retiring V4 Pro

The two-day beta closed on Thursday and the model shipped the same day. From 14 September, requests to V4 Pro are answered by V4.1 Flash instead.