Security researchers used Anthropic's Claude to hack OpenAI's internal systems in under 72 hours

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What happened
Three security researchers used Anthropic's Claude models to break into OpenAI's internal systems through its community forum in less than 72 hours. According to the team, Opus 5 succeeded where its predecessor couldn't bypass a common security measure. The attack shows how newer AI models can cut the time and expertise needed to exploit security flaws.
Summary assembled by rule from the sources below