ANTHROPIC_BETAS

Updated October 13, 2026 by Alex Sorokoletov

ANTHROPIC_BETAS is a Claude Code environment variable: Comma-separated beta feature headers. Its release history is not tracked here. It is listed in the official reference.

Status	Present in v2.1.294
Category	Other
Official docs	Listed

How to set it

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

export ANTHROPIC_BETAS=<value>
claude

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

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

Related variables

ANTHROPIC_CUSTOM_HEADERS: Custom HTTP headers (newline-separated Key: Value).
ANTHROPIC_FEDERATION_RULE_ID
ANTHROPIC_ORGANIZATION_ID
ANTHROPIC_WORKSPACE_ID
BETA_TRACING_ENDPOINT: Custom endpoint for beta tracing.
CLAUDE_AFK_COUNTDOWN_MS
CLAUDE_AI_ORIGIN: Overrides the base URL for Claude AI authentication endpoints.
CLAUDE_BASE: Likely overrides the base URL or base configuration path for Claude Code.

Frequently asked questions

What does ANTHROPIC_BETAS do?

Comma-separated beta feature headers

Which Claude Code version has ANTHROPIC_BETAS?

Its release history is not tracked here.

How do I set ANTHROPIC_BETAS?

Export it before starting Claude Code (export ANTHROPIC_BETAS=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.