Anthropic restricts Claude Max to official Claude Code CLI

Anthropic is reining in the "subscription arbitrage" that allowed users to burn thousands of dollars in tokens on a flat-rate plan via third-party wrappers.

• –New policy explicitly restricts Pro and Max subscription OAuth tokens to Claude.ai and the official Claude Code CLI
• –Technical safeguards now prevent third-party "harnesses" from spoofing the official CLI to access subscription limits
• –Developers must now choose between the $200/month predictable subscription cost (using official tools) and pay-as-you-go API costs for custom IDE setups
• –Popular third-party agents like OpenCode have already removed subscription key support following legal and technical pressure from Anthropic
• –Highlights the economic tension between subscription-based consumer AI and the high cost of agentic reasoning loops