VERTEX_REGION_CLAUDE_4_5_OPUS

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VERTEX_REGION_CLAUDE_4_5_OPUS is a Claude Code environment variable. Its release history is not tracked here. It is listed in the official reference.

StatusPresent in v2.1.294
CategoryCloud providers
Official docsListed

How to set it

For one session, export it in the shell that starts Claude Code:

export VERTEX_REGION_CLAUDE_4_5_OPUS=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "VERTEX_REGION_CLAUDE_4_5_OPUS": "<value>"
  }
}

Related variables

Frequently asked questions

Which Claude Code version has VERTEX_REGION_CLAUDE_4_5_OPUS?

Its release history is not tracked here.

How do I set VERTEX_REGION_CLAUDE_4_5_OPUS?

Export it before starting Claude Code (export VERTEX_REGION_CLAUDE_4_5_OPUS=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.