Check Which Models the Gemini API Launched and Retired from August to October
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Key Takeaway
If your code uses the Gemini API, check model names with -preview first. Gemini 3.7 Flash reached general availability on August 13 and 3.8 Flash on September 2; shutdowns follow on October 22 and November 17.
What reached general availability from August to October?
I pulled only the general availability (GA) entries from the changelog, in date order.
| Date (2026) | Model | Notes |
|---|---|---|
| August 13 | gemini-3.7-flash | Introductory price through December 31 |
| August 26 | gemini-3.5-transcribe, gemini-3.5-transcribe-live | Speech transcription |
| August 27 | gemini-omni-1.1-flash | Video generation, resolution parameter added |
| September 2 | gemini-3.8-flash | |
| September 3 | lyria-3.5 | |
| September 15 | gemini-3.8-live, gemini-3.8-live-extended-thinking | |
| September 22 | gemini-3.8-flash-tts, gemini-3.8-flash-lite-tts | Voices endpoint added |
| October 6 | gemini-nano-banana-2.1 | Deprecation notice for gemini-3.1-flash-image |
The changelog records that Omni Flash gained video extension, first and last frame interpolation, and a resolution parameter from 360p up to 4k.
How are deprecations and access limits recorded?
The July 21 entry lists temperature, top_p, and top_k as no longer supported. On September 17, antigravity-preview-09-2026 arrived with changed built-in tool names and parameters, and the previous antigravity-preview-05-2026 shut down on October 5. On October 6, gemini-3.1-flash-image received a deprecation notice, but it says no shutdown date has been set.
For the Omni Flash preview, the schedules on the two pages differ. The changelog gives September 30 for the shutdown of gemini-omni-flash-preview, while the table on the deprecations page gives October 22. If you have code that uses this model, it is safer to move quickly, going by the earlier date.
Which models shut down next?
According to the table on the deprecations page, these dates remain.
- October 22: three veo-3.1 previews, gemini-omni-flash-preview (replacement gemini-omni-1.1-flash)
- November 17: gemini-3.1-flash-live-preview, gemini-3.1-flash-tts-preview, gemini-2.5-flash-native-audio-preview-12-2025, and two 2.5 TTS previews (replacements are gemini-3.8-live or the 3.8 TTS family)
- March 15, 2027: gemini-2.5-flash-image (replacement gemini-3.1-flash-lite-image)
What should developers check?
- Find every model name with the
-previewsuffix in your code and match it against the shutdown dates. - If any requests pin temperature, top_p, or top_k, check the model's documentation for whether they are supported.
- Redo any cost calculation that assumes the introductory price using the price table for after December 31.
- Voice and image models can change response formats, so compare with sample calls before switching.
This article reflects the check date of 2026-10-08. The Gemini API changelog and deprecations page from Google AI for Developers are the basis. If the dates on the two pages differ, go by the earlier date and confirm through official channels.
Frequently Asked Questions
Have the Gemini 2.5 models been deprecated?
The September 18 changelog entry says access to 2.5 models is limited to users who previously used them, but that they are not deprecated. The deprecations page also shows no shutdown date for the gemini-2.5-pro and flash families.
What happens to parameters like temperature?
The July 21 entry lists temperature, top_p, and top_k as no longer supported. If you have code that passes these values to the affected models, check the behavior in the official documentation.
Does the launch price for 3.7 Flash stay in place?
The changelog says it is an introductory price through December 31, 2026. For prices after that, check the official pricing table again.
Sources & Verification Date
- Gemini API changelog (Google AI for Developers) · Verified
- Gemini API deprecations (Google AI for Developers) · Verified
All materials have been verified from official announcements and may have changed since verification.