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# Security Researchers Hacked OpenAI Using Anthropic's Claude
- URL: https://adjacent.media/signals/security-researchers-hacked-openai-using-anthropics-claude/
- Published: 2026-09-19T16:16:16.000Z
- Updated: 2026-09-19T16:16:16.000Z
- Description: The irony is sharp: a competing AI company’s model (Claude) became the tool for breaching OpenAI’s systems, exposing how AI assistants can be weaponized against each other’s infrastructure. OpenAI’s vulnerability runs deeper than reputation damage.
- Author: Jonathan Greene
- Tags: #signal, theme-ai, ai security, model capability, adversarial use

Source: [The Verge](https://www.theverge.com/ai-artificial-intelligence/997444/openai-hack-claude-heif-heist?ref=adjacent.media)

The irony is sharp: a competing AI company's model (Claude) became the tool for breaching OpenAI's systems, exposing how AI assistants can be weaponized against each other's infrastructure. OpenAI's vulnerability runs deeper than reputation damage. Frontier AI labs remain exposed to the exact threat they're supposed to be hardening against, and capability concentration among a handful of vendors creates cascading security risks across the industry. The 72-hour timeline suggests these weren't zero-days or nation-state-grade exploits, but relatively accessible attack vectors that security researchers could operationalize quickly.