Gemini 3.5 Flash is now available as a model option for Notion Custom Agents.

Notion’s announcement highlights Gemini 3.5 Flash as a new choice in the model picker, with the UI showing a comparison of speed, intelligence, and cost across models. This gives you a faster model option to run agent workflows where latency and cost matter more than maximum reasoning depth.

To use it, go to your agent settings (or Notion AI settings), open the model selector, and choose Gemini 3.5 Flash.