WSJ: OpenAI checked fired safety researchers' phones for Signal chats

OpenAI's security team asked three fired safety researchers to open their personal phones during a leak investigation and found disappearing Signal messages, the Journal reported. Tomek Korbak, Mikita Balesni and Jasmine Wang deny sharing confidential information.

• Fired researchers Tomek Korbak, Mikita Balesni and Jasmine Wang deny any leak
• Investigators named METR's Ryan Greenblatt as suspected leaker; he denies it
• The inquiry followed a 1 September Information story about the Astra model
• OpenAI says the firings were not over raising safety concerns