Anthropic Vertex Plugin for Claude Models on Google Vertex AI
This page covers the OpenClaw Anthropic Vertex provider plugin for using Claude models on Google Vertex AI. It includes distribution details, provider surface, and model-specific guidance for Fable 5 and Sonnet 5.
Read this when
- You are installing, configuring, or auditing the anthropic-vertex plugin
Anthropic Vertex plugin
OpenClaw Anthropic Vertex provider plugin for Claude models on Google Vertex AI.
Distribution
- Package:
@openclaw/anthropic-vertex-provider - Install route: npm; ClawHub
Surface
providers: anthropic-vertex
Claude Fable 5
Specify anthropic-vertex/claude-fable-5 when the model is available in your Google Cloud region.
Fable 5 always uses adaptive thinking and defaults to high effort. /think off and
/think minimal use low effort because the model does not support disabling thinking.
Claude Sonnet 5
Use anthropic-vertex/claude-sonnet-5 with Vertex's global, us, or eu
endpoint. Sonnet 5 defaults to adaptive thinking at high effort and supports
/think off or the native /think xhigh|max levels. OpenClaw publishes its
1,000,000-token context window and 128,000-token output limit automatically.
Catalog pricing follows Vertex's introductory global rate of $2/$10 per
million input/output tokens through August 31, 2026, then $3/$15 from
September 1. The us and eu multi-region endpoints use Vertex's documented
10% premium.