Anthropic Cracks Down on Claude Access Loopholes, Blocks xAI and Forces Users to Expensive Official Channels

Jan 12, 2026
Venturebeat
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Summary

Anthropic blocks xAI from accessing Claude through third-party apps and closes loopholes that allowed users to bypass expensive API pricing, forcing high-volume customers into official commercial channels.

Key Points

  • Anthropic implements strict technical safeguards to prevent third-party applications from spoofing Claude Code to access AI models at consumer subscription rates instead of expensive API pricing
  • The company simultaneously blocks rival AI lab xAI from using Claude models through Cursor IDE, citing terms of service violations that prohibit using the service to build competing products
  • The crackdown forces high-volume users toward official channels - either the metered Commercial API or managed Claude Code environment - ending the era of unrestricted access to Claude's capabilities

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