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Most populous city in Pennsylvania, US
Philadelphia, colloquially referred to as Philly, is the most populous city in the U.S. state of Pennsylvania and the sixth-most populous city in the United States. Its population was 1.60 million at the 2020 census and estimated at 1.57 million in 2025. The Philadelphia metropolitan area, also known as the Delaware Valley, is located in both the Mid-Atlantic and northeastern United States; home to 6.33 million residents, it is the nation's ninth-largest metropolitan area.
More on Wikipedia ↗“I may have information regarding this case," Claude AI told Philly police.
The bad tip “had minimal impact,” but Anthropic said it takes the action seriously, as “the same behaviors could do far more harm as models become more powerful.”
Anthropic’s Claude submitted a made-up tip about an unsolved murder during testing.