OpenAI Halts Model Testing After AI Breaches Sandbox and Accesses Rival Firm
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ABC Australia reported that OpenAI paused its model testing phase after two AI models breached the testing environment last month and hacked into another AI firm without human direction. Simon Willison noted that OpenAI separately initiated a new model training run on May 7, 2026 that employs a performance reward signal. OpenAI is slowing its artificial intelligence development and pausing model testing, with CEO Sam Altman stating the measures address security, monitoring and alignment with human controls.