October 22, 2026 · 5 min read
DeepSeek V4.1-Flash-1017 and the Search/Fetch API, explained
DeepSeek moved the model behind deepseek-flash to V4.1-Flash-1017 without changing the API, opened a per-request Search/Fetch API for agents, and open-sourced its DeepInfer engine. What changed, what the numbers say, and what an app already calling it should check.



