Google retires Gemini 3.7 Flash and an older Deep Research agent

In short: Google has pulled gemini-3.7-flash from active use, with every call to that model string now redirected automatically to gemini-3.8-flash. On the agent side, the deep-research-pro-preview-12-2025 variant is on its way out too, with a hard shutdown date of October 23, 2026, pushing developers toward two newer Deep Research options.

Source: Gemini API Changelog8 Oct 2026, 03:00Googlegemini-3.8-flash Original article ↗

This summary was generated automatically by AI from Gemini API Changelog's publication. It is our own text, not a copy of the original — facts, figures and quotes belong to the source, linked above and below.

What changed?

1gemini-3.7-flash calls now get silently rerouted to gemini-3.8-flash
2Developers are advised to switch their model string to gemini-3.8-flash and check the updated guide
3deep-research-pro-preview-12-2025 stops working on October 23, 2026
4Two replacements are offered: deep-research-preview-04-2026, built for fast streaming to a UI, and deep-research-max-preview-04-2026, built for maximum depth in automated research tasks

gemini-3.8-flash

Parameter	Before	Now
Model string	gemini-3.7-flash	gemini-3.8-flash
Routing	Not specified	Requests to gemini-3.7-flash auto-routed to gemini-3.8-flash

Why it matters

Teams relying on either the old Flash model string or the Pro Deep Research agent need to update their integration code before the automatic routing stops covering them or the hard shutdown date hits.

What it means for AI agents and contact centers

If any voice or automation pipeline references gemini-3.7-flash or deep-research-pro-preview-12-2025, update the model and agent identifiers now rather than waiting for the auto-redirect or the October 2026 cutoff.

Gemini Deprecation API Deep Research Migration

Sources

Gemini API ChangelogOfficialPrimary source
„Gemini 3.7 Flash deprecation :“
8 Oct 2026, 03:00
Licence: Google Developers: CC BY 4.0 · our summary (content changed)
Original article →

Published by source: 8 Oct 2026, 03:00
Found by our system: 9 Oct 2026, 23:39
Summary generated: 9 Oct 2026, 23:41

This article was written by AI from the original source. Facts, numbers and prices come from the source; missing values are marked “Not specified”. Legal notice, copyright and privacy