Anthropic restricts Claude subscription use with third-party harnesses including OpenClaw

Anthropic is implementing a policy change that affects developers using Claude models through third-party tools. Starting April 4 at 12pm PT / 8pm BST, Claude subscription limits will no longer apply to third-party harnesses including OpenClaw.

Key Details

According to an email received by users, the change means that while Claude subscriptions still cover all Claude products (including Claude Code and Claude Cowork), using third-party harnesses with your Claude login will now require extra usage. This extra usage will be billed separately from your subscription through a pay-as-you-go option.

The policy will be enforced starting April 4 with OpenClaw, but applies to all third-party harnesses and will be rolled out to more tools shortly.

Users who want to continue using third-party harnesses with their Claude login need to turn on extra usage for their account.

Developer Impact

This affects developers who rely on Claude models through OpenClaw for specific workflows. One user reported using Claude Max subscription with OpenClaw for analysis and task execution, while using Haiku or cron for research tasks with their agents.

The change has prompted discussions about alternatives, with users considering options like Ollama or Gemma 4, though concerns exist about whether cheaper local models will meet their use case requirements.