#27063 — Opus 4.7 doesn't work through Google Vertex AI

[ElioNeto]

Description

Opus 4.7 is available in model selection in OpenCode but when using it - it always return 429. To be clear: we have it enabled in our organization and it's available through Claude Code (but requires CLOUD_ML_REGION=eu to be set, which OpenCode seems to ignore).

Another problem that 1M token Sonnet/Opus aren't in the list, but should I create a separate issue for that?
https://docs.cloud.google.com/vertex-ai/generative-ai/docs/partner-models/claude/sonnet-4-6 and some other models has already "Maximum input tokens: 1,000,000", put in OpenCode it looks that it is still set to 200k

Plugins

No response

OpenCode version

1.14.48

Steps to reproduce

1. Use https://opencode.ai/docs/providers/#google-vertex-ai for specific of installation
2. In our case variables are next (we use just models available in EU):

GOOGLE_APPLICATION_CREDENTIALS=/home/<redacted>/.config/gcloud/application_default_credentials.json
GOOGLE_CLOUD_PROJECT=<redacted>
VERTEX_LOCATION=europe-west1 # note that nothing changes if I set "eu" there

# Claude Code
export CLOUD_ML_REGION=eu

export CLAUDE_CODE_USE_VERTEX=1
export ANTHROPIC_VERTEX_PROJECT_ID=<redacted>

3. Open OpenCode, select Opus 4.6, everything works
4. Select Opus 4.7 - 429 is returned
   If you select same model within Claude Code - everything is fine. So the problem is most probably on provider side.

Screenshot and/or share link

Opus 4.7
<img width="2560" height="1440" alt="Image" src="https://git

[Truncado — 1772 chars totais]

[ElioNeto]

Skipping — requires Google Vertex AI access and organization-level configuration to reproduce (CLOUD_ML_REGION, 1M token models). Needs manual triage with Vertex AI access.

[ElioNeto]

Skipping — requires manual triage. Unable to resolve automatically due to complexity, platform/API constraints, or insufficient information.