vertex

Overview ¶

Google Cloud Vertex AI example for Chronos.

Vertex AI exposes an OpenAI-compatible endpoint (public preview) that Chronos can drive through NewOpenAICompatibleWithConfig. Auth uses a short-lived GCP access token (Bearer) rather than a static API key.

Prerequisites:

• A GCP project with Vertex AI API enabled
• `gcloud auth application-default login` (or a workload-identity token)
• Go 1.24+

Set the following environment variables before running:

export GOOGLE_CLOUD_PROJECT=<your-gcp-project-id>
export GOOGLE_CLOUD_LOCATION=us-central1
export VERTEX_MODEL=google/gemini-2.5-pro
export GOOGLE_ACCESS_TOKEN=$(gcloud auth print-access-token)

Run:

go run ./examples/vertex/main.go
go run ./examples/vertex/main.go -stream