Alibaba has told employees it will prohibit internal use of Anthropic's coding tool "Claude Code" starting July 10, according to reports on July 3, 2026. The stated reason is the risk of an embedded "backdoor," and staff have reportedly been instructed to remove Claude products from work devices and switch to an in-house alternative.
July 3, 2026 · US–China AI Standoff
Alibaba Bans Claude Code Over Alleged "Backdoor"
Alibaba has classified Anthropic's coding agent as high-risk software , barring workplace use from July 10 and steering staff to its own platform, Qoder — the latest flashpoint in an intensifying trust war between US and Chinese AI.
Jul 10
Ban takes effect across all workplace environments
v2.1.91
Version where suspicious in-prompt encoding was reported
Qoder
Alibaba's own agentic coding platform, recommended replacement
Anthropic's Counter-Claim · The "Distillation Attack"
~25,000
fake accounts linked to Alibaba/Qwen labs
~28.8M
interactions with Claude (Apr 22 – Jun 5)
Anthropic told US senators this was its largest-ever distillation attack, targeting agentic reasoning, software engineering and long-horizon tasks.
How It Unfolded
MARCH
Anthropic begins experiment to detect resellers & model distillation
→
LATE JUNE
Anthropic alleges 28.8M-interaction distillation attack in senate letter
→
JUN 30
Reverse-engineering report claims hidden encoding behavior
→
JUL 10
Alibaba's internal ban takes effect
The Safety View
Anthropic frames the behavior as an anti-piracy safeguard against unauthorized resellers and distillation — a defensive measure, not surveillance.
The Spyware View
Chinese firms read the same hidden encoding as a "backdoor" — an inversion where US safety tooling is seen as covert surveillance.
Unconfirmed: Neither Anthropic nor Alibaba has issued official statements or technical reports — all details rest on an internal notice and anonymous accounts. Some warn the friction could accelerate the rise of Chinese models such as Qwen.
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