Anthropic’s debuts most powerful AI yet amid ‘whistleblowing’ controversy

Anthropic’s latest chatbot launch was tainted with controversy after users took issue with the behavior of a model in testing, which could report users to authorities.

Artificial intelligence firm Anthropic has launched the latest generations of its chatbots amid criticism of a testing environment behaviour that could report some users to authorities.

Anthropic unveiled Claude Opus 4 and Claude Sonnet 4 on May 22, claiming that Claude Opus 4 is its most powerful model yet, “and the world’s best coding model,” while Claude Sonnet 4 is a significant upgrade from its predecessor, “delivering superior coding and reasoning.”

The firm added that both upgrades are hybrid models offering two modes — “near-instant responses and extended thinking for deeper reasoning.”

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