> ## Documentation Index
> Fetch the complete documentation index at: https://docs.retellai.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Gemini 2.5 Pro model replacement

> On 11/29/2026, Retell replaces Gemini 2.5 Pro (gemini-2.5-pro) with gemini-3.8-flash. Existing configurations will be automatically migrated.

* The following models are being deprecated and replaced with newer versions:
  * **Gemini models:**
    * `gemini-2.5-pro` → replaced with `gemini-3.8-flash`
  * On 11/29/2026, existing configurations will be automatically migrated to the replacement model.


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