When is chat-bison retired?
retired
chat-bison on Google Cloud Vertex AI was retired on Apr 21, 2025.
Replacement: gemini-2.5-flash-lite
Warning: the replacement was retired on Oct 20, 2026. gemini-2.5-flash-lite . Our records point to gemini-3.8-flash as the first active model in the chain.
| Provider (API) | Google Cloud Vertex AI |
|---|---|
| Model ID | chat-bison |
| Deprecation announced | — |
| Shutdown date | Apr 21, 2025 |
| Section on source page | The following table lists the retired models (click to expand) |
| Source | https://docs.cloud.google.com/gemini-enterprise-agent-platform/models/model-versions |
| Last checked | 2026-11-06T05:52:31+00:00 |
Last checked 2026-11-06 · Source · Markdown · JSON
Migration
- Google Cloud Vertex AI lists
gemini-2.5-flash-liteas the recommended replacement forchat-bison(official source). - Read the provider's official notes on the source page before switching model IDs.
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