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Description
Description
Currently, the SDK assumes that all Vertex AI models are hosted in region-specific endpoints like:
https://${region}-aiplatform.googleapis.com/v1/projects/${project}/locations/${region}/publishers/google
However, this pattern fails for the global region, which uses a different base URL:
https://aiplatform.googleapis.com/v1/...
Google’s official documentation confirms that some models are only available in the global region, especially on initial release. For example, gemini-2.5-flash-lite.
When attempting to use such models with GOOGLE_VERTEX_LOCATION="global", the following error occurs:
APICallError [AI_APICallError]: Publisher Model `projects/[PROJECT_ID]/locations/us-central1/publishers/google/models/gemini-2.5-flash-lite-preview-06-17` was not found...
The request is incorrectly sent to:
https://global-aiplatform.googleapis.com/...
Instead of:
https://aiplatform.googleapis.com/...
Related PR
fix: use appropriate domain for vertex global #6810
AI SDK Version
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