Gemini Deep Research agent changelog

Deep Research agent deep-research-pro-preview-12-2025 shuts down October 23

The deep-research-pro-preview-12-2025 agent is deprecated and will be shut down on October 23, 2026. Google recommends deep-research-preview-04-2026 or deep-research-max-preview-04-2026.

Who is affected:

Apps calling the deep-research-pro-preview-12-2025 agent.

Action needed:

Change the agent parameter to deep-research-preview-04-2026 or deep-research-max-preview-04-2026.

New Deep Research agent versions released in the Gemini API

Google released deep-research-preview-04-2026 (built for speed and streaming) and deep-research-max-preview-04-2026 (maximum comprehensiveness), adding collaborative planning, visualization, MCP server integration and File Search.

Who is affected:

Apps that run the Deep Research agent through the Gemini Interactions API.

What to do:

Evaluate the new agent versions. The older deep-research-pro-preview-12-2025 was later scheduled for shutdown.