Gemini API deep-research-pro-preview-12-2025 agent shuts down on October 23

GeminiRetirementAnnounced

Google deprecated the Deep Research agent deep-research-pro-preview-12-2025 in the Gemini API and will shut it down on October 23, 2026.

Developers should move to deep-research-preview-04-2026, which Google describes as designed for speed and efficiency and ideal to be streamed back to a client UI, or deep-research-max-preview-04-2026, described as maximum comprehensiveness for automated context gathering and synthesis.
To migrate, change the agent parameter in interactions.create requests.

Who can use it: Gemini API developers using the deep-research-pro-preview-12-2025 agent.
When: 2026-10-23 · date only
Deprecation announced October 8, 2026. Shutdown October 23, 2026.

Gemini API release notes Announced 2026-10-08 · date only

Read the official announcement for access details. Availability can depend on your plan, region or workplace settings.

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