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Add google-vertex-openapi provider for third-party models (GLM) #7388

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opened 2026-02-16 18:07:01 -05:00 by yindo · 1 comment
yindo commented 2026-02-16 18:07:01 -05:00
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Originally created by @leehack on GitHub (Jan 23, 2026).

Originally assigned to: @thdxr on GitHub.

Problem

The existing google-vertex provider uses the official SDK and only supports Google's native models (Gemini). Third-party models like GLM-4.7 from ZhipuAI are available on Vertex AI but require access through the OpenAPI-compatible endpoint with different authentication (gcloud ADC or service account instead of the official SDK).

Requested Solution

Add a new google-vertex-openapi provider that:

  1. Uses the OpenAPI-compatible endpoint on Vertex AI
  2. Supports Application Default Credentials (ADC) via google-auth-library
  3. Works with "gcloud auth application-default login" or service account authentication
  4. Allows configuring project ID and location via config or environment variables
  5. Is configurable for third-party models like GLM-4.7

Use Cases

  • Users with GLM-4.7 models deployed on Vertex AI
  • Other third-party models available via Vertex Model Garden
  • Users who prefer gcloud ADC authentication over service account management

Alternative Solutions Considered

  • Use the existing google-vertex provider: Does not work for third-party models
  • Add models directly to models.dev API: Requires API access
  • Create an auth plugin: Plugins cannot add new providers, only modify existing ones

Additional Context

This follows the existing custom loader pattern in provider.ts.

Originally created by @leehack on GitHub (Jan 23, 2026). Originally assigned to: @thdxr on GitHub. ## Problem The existing google-vertex provider uses the official SDK and only supports Google's native models (Gemini). Third-party models like GLM-4.7 from ZhipuAI are available on Vertex AI but require access through the OpenAPI-compatible endpoint with different authentication (gcloud ADC or service account instead of the official SDK). ## Requested Solution Add a new google-vertex-openapi provider that: 1. Uses the OpenAPI-compatible endpoint on Vertex AI 2. Supports Application Default Credentials (ADC) via google-auth-library 3. Works with "gcloud auth application-default login" or service account authentication 4. Allows configuring project ID and location via config or environment variables 5. Is configurable for third-party models like GLM-4.7 ## Use Cases - Users with GLM-4.7 models deployed on Vertex AI - Other third-party models available via Vertex Model Garden - Users who prefer gcloud ADC authentication over service account management ## Alternative Solutions Considered - Use the existing google-vertex provider: Does not work for third-party models - Add models directly to models.dev API: Requires API access - Create an auth plugin: Plugins cannot add new providers, only modify existing ones ## Additional Context This follows the existing custom loader pattern in provider.ts.
yindo closed this issue 2026-02-16 18:07:01 -05:00
yindo commented 2026-02-16 18:07:02 -05:00
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@github-actions[bot] commented on GitHub (Jan 23, 2026):

This issue might be a duplicate of existing issues. Please check:

  • #9909: Unable to access GLM 4.7 on Google Vertex AI

This issue describes the exact same problem - users trying to access GLM 4.7 models on Vertex AI through the OpenAPI-compatible endpoint. The current google-vertex provider doesn't support third-party models like GLM, and #9909 is reporting that attempting to use GLM 4.7 results in a "Not Found" error. Your proposed google-vertex-openapi provider would directly solve that issue.

Feel free to ignore if your feature request has a different scope than the existing issue.

@github-actions[bot] commented on GitHub (Jan 23, 2026): This issue might be a duplicate of existing issues. Please check: - #9909: Unable to access GLM 4.7 on Google Vertex AI This issue describes the exact same problem - users trying to access GLM 4.7 models on Vertex AI through the OpenAPI-compatible endpoint. The current `google-vertex` provider doesn't support third-party models like GLM, and #9909 is reporting that attempting to use GLM 4.7 results in a "Not Found" error. Your proposed `google-vertex-openapi` provider would directly solve that issue. Feel free to ignore if your feature request has a different scope than the existing issue.
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Reference: anomalyco/opencode#7388
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