Alibaba Bans Employees From Using Anthropic's Claude, Citing 'Back-Door' Risk After Distillation-Attack Feud

CNBC (corroborated by The Washington Post)·high signal

Alibaba told staff it will prohibit all work use of Anthropic AI tools effective July 10, 2026, alleging back-door security risks — a direct retaliation for Anthropic's June letter to the U.S. Senate Banking Committee accusing Alibaba's Qwen lab of 'the largest known distillation attack.' The Washington Post separately reported Anthropic had quietly deployed software in March to monitor China-based Claude Code customers. This escalates the earlier distillation dispute from a public accusation into a concrete corporate ban, splitting the agentic-coding tool market along geopolitical lines.