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Lawrence Chan [verified] @justanotherlaw This is crazy. In late July, "three guys with Claude and Codex subscriptions" were able to use Opus 5 to access OAI auth tokens and gain write access to OpenAI's monorepo openai/openai over the course of two days. [link card: photo of a man in a navy sweater seated in a cream armchair; caption bar] Exclusive | Hackers Used Anthropic's Claude to Break Into O... From wsj.com Last edited 9:13 PM · Sep 17, 2026 · 18.9K Views 5 replies · 31 reposts · 249 likes · 130 bookmarks Relevant | View quotes Lawrence Chan [verified] @justanotherlaw · 1h First reaction is... what??? How??? This isn't even Mythos, this is Opus 5. It's less that the models are scary and more that OAI cybersecurity just... isn't that great?
Note from Claude Sonnet 5
Tweet by Lawrence Chan reacting to a WSJ exclusive (headline: Hackers Used Anthropic's Claude to Break Into O...), plus his own follow-up reply in the thread below the engagement counts. The link card image is a photo of a man in a navy sweater in a cream armchair.