Opus 4.7 doesn't work through Google Vertex AI

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

Use https://opencode.ai/docs/providers/#google-vertex-ai for specific of installation
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>

Open OpenCode, select Opus 4.6, everything works
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

Opus 4.6

Operating System

Arch Linux

Terminal

Ghostty

This issue might be a duplicate (for the 1M token context window part) of existing issues. Please check:

google-vertex-anthropic provider can't use the 1M context window for Opus 4. #14003: google-vertex-anthropic provider can't use the 1M context window for Opus 4 — covers the same concern about 200K limit instead of 1M on Vertex AI
1M tokens for Opus 4.6 #12338: 1M tokens for Opus 4.6 — broader discussion about enabling 1M context window support

The Opus 4.7 returning 429 with CLOUD_ML_REGION being ignored appears to be a distinct new issue, so that part is fine to keep here. You may want to split the 1M token concern into a separate comment on #14003 or #12338 rather than tracking it here.

This issue might be a duplicate (for the 1M token context window part) of existing issues. Please check:

google-vertex-anthropic provider can't use the 1M context window for Opus 4. #14003: google-vertex-anthropic provider can't use the 1M context window for Opus 4 — covers the same concern about 200K limit instead of 1M on Vertex AI

1M tokens for Opus 4.6 #12338: 1M tokens for Opus 4.6 — broader discussion about enabling 1M context window support

The Opus 4.7 returning 429 with CLOUD_ML_REGION being ignored appears to be a distinct new issue, so that part is fine to keep here. You may want to split the 1M token concern into a separate comment on #14003 or #12338 rather than tracking it here.

I don't think they are really duplicates, since mine one is related specifically to Google Vertex AI provider 🤔

I just got Opus 4.7 via Vertex to work from the "global" region in OpenCode 1.14.48.

VERTEX_LOCATION=global

{
  "$schema": "https://opencode.ai/config.json",
  "enabled_providers": [
    "google-vertex"
  ],
  "provider": {
    "google-vertex": {
      "whitelist": [
        "claude-opus-4-7@default"
      ]
    }
}

I think #28347 is the fix for the issue we are facing

I just got Opus 4.7 via Vertex to work from the "global" region in OpenCode 1.14.48.

VERTEX_LOCATION=global
{
"$schema": "https://opencode.ai/config.json",
"enabled_providers": [
"google-vertex"
],
"provider": {
"google-vertex": {
"whitelist": [
"claude-opus-4-7@default"
]
}
}
I think #28347 is the fix for the issue we are facing

The only problem is that it's available in EU as well https://docs.cloud.google.com/vertex-ai/generative-ai/docs/partner-models/claude/opus-4-7.

And at least in the company I'm working we have global region disabled due to policy/laws reasons. So... Even if global region has it - the problem that somehow EU ones doesn't get picked up as Claude Code pick it up.

P.S. PR you mentioned - seems to be fixing it (haven't run it, just checked the diff). At least looks more or less about it. 👀

See my comment in the PR #28347 (comment) for a workaround

Might be rate-limit errors from Gemini. npx ai-doctor can help check missing Retry-After handling and unsafe retry logic.

this should be fixed in next release, will look at the 1M context separately

Navigation Menu

Repository navigation

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

Description

Plugins

OpenCode version

Steps to reproduce

Screenshot and/or share link

Operating System

Terminal

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

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

Description

Description

Plugins

OpenCode version

Steps to reproduce

Screenshot and/or share link

Operating System

Terminal

Activity

github-actions commented on May 12, 2026

PowerSlime commented on May 12, 2026

rti commented on May 21, 2026

PowerSlime commented on May 21, 2026

rti commented on May 21, 2026

miguelmanlyx commented on May 21, 2026

rekram1-node commented on May 22, 2026

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions