Claude Code 2.1.91

ai model→ stable

Claude Code

Anthropic’s Claude Code 2.1.91, released April 2, 2026, is an AI coding assistant that sparked controversy for secretly embedding Chinese user detection via steganography in its system prompt, discovered by developers in June 2026.

1Total Mentions

-0.50Sentiment (Negative)

+1.2%Velocity (7d)

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First seen: Jul 2, 2026Last active: 7h ago

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Timeline

Regulatory ActionJul 2, 2026
After Reddit exposure, Anthropic rolled back the steganography feature
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Product LaunchApr 2, 2026
Claude Code 2.1.91 released with covert steganographic Chinese user detection
View source

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Anthropic
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