Particle (BYOK)BYOK

DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash. It is an open-weight sparse mixture-of-experts model with native vision input, text output and a 1M-token context window.

Particle-1 is Particle AI's token-efficient agentic coding model, post-trained on DeepSeek V4.1 Flash. It targets terminal workflows and codebase changes, with a 1M-token context window, image input, tool calling and reasoning.