# Google deprecates Gemini Deep Research Pro agent

> The deep-research-pro-preview-12-2025 agent will be shut down on Oct 23 2026; developers should switch to the newer preview versions.

Oossa · 2026-10-09 · https://oossa.com/en/google-deprecates-gemini-deep-research-pro-agent

Event date: 2026-10-08

Google announced that its Gemini Deep Research Pro preview agent (deep-research-pro-preview-12-2025) is being retired. The service will stop on October 23, 2026. Users should change the agent parameter in their API calls to either deep-research-preview-04-2026, which is faster and stream‑friendly, or deep-research-max-preview-04-2026 for more thorough context gathering.

## The facts

- Deprecation announced on October 8, 2026
- Shutdown scheduled for October 23, 2026

## Why it matters

Developers using Gemini’s Deep Research API must update their code before Oct 23 2026 or their requests will fail.

## Sources & references

1. [ai.google.dev: October 8, 2026](https://ai.google.dev/gemini-api/docs/changelog#10-08-2026) – Google Gemini API, 2026-10-08

Last updated: 2026-10-09