Anthropic bans third-party agents, hits Pro users

Anthropic’s "Great Harness Ban" marks a pivotal shift in AI unit economics, prioritizing API margins over community-led experimentation.

• –Crackdown targets popular open-source tools like OpenClaw that allowed agentic workflows on flat-rate subscriptions
• –Anthropic justifies bans via engineering constraints like prompt caching disruption, but critics see a move to stifle competition for their official Claude Code CLI
• –Rapid automated suspensions have left many high-paying users stranded in "support hell" with zero path to human-reviewed appeals
• –Shift highlights the high "platform risk" of building on proprietary LLM consumer tiers instead of raw developer APIs
• –Movement has fueled the rise of model-agnostic alternatives like OpenClaude to bypass platform-specific lock-ins