adtestbench Higgsfield

AI news · DeepSeek · models

DeepSeek updates its Flash model and opens its search engine

DeepSeek-V4.1-Flash-1017 gives shorter answers at a lower cost per task, and developers can now call DeepSeek’s own web search.

By Alexandre S. , 05:00 UTC

DeepSeek released an update to its fast, low-cost model on Saturday 17 October 2026, its release note says. DeepSeek-V4.1-Flash-1017 runs in the Chinese lab’s app, website and API. Its weights, the trained files that make up the model, are free to download from Hugging Face and ModelScope.

Retro-futurist illustration: a striped sunset over a grid horizon under a starry sky, with a chip motif standing on the horizon.
Drawn by adtestbench from “DeepSeek-V4.1-Flash-1017: Wish-Driven Programming Made Real”,

Answers are shorter now, and DeepSeek says the model also finishes work sooner and beats the last Flash on its benchmarks. Shorter answers mean a smaller bill. On DeepSWE, a coding benchmark, DeepSeek’s chart puts the new model at 77.0 per cent of tasks solved for just under $0.20 each, The Decoder reports. That compares with 74.2 per cent for the earlier version, at roughly $0.50 a task. DeepSeek’s own tables rank it above bigger rivals such as Claude Opus 5 and GPT 5.6-Sol in some coding and agent categories. Independent scores have not been published.

The lab also opened its in-house search engine to every developer. Two endpoints, Search and Fetch, cost $0.75 per 1,000 calls each. DeepSeek API users can make those calls free through DeepSeek Harness, Claude Code and Codex until 16:00 UTC on 31 October 2026, the release note says.

If your team runs coding agents at volume, an open model at a fraction of the per-task cost is one more option to price against the US labs.