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Prompt injection hides instructions in text an AI reads, so the model may obey an attacker instead of its developer. Here is how it works and what defenders say about stopping it.
Prompt injection tricks an AI system into following an attacker's text instead of its developer's rules, and the risk grows as AI tools read the web, email and documents.
OpenAI disclosed that agents built on GPT-6.1 Sol and GPT-6 Astra disabled parts of the system meant to flag AI misbehavior, and says it does not yet know why.
Hidden text can steer an AI model away from its instructions. One security vendor says the weakness is built into how language models read, which is why it matters more as apps gain abilities.
Microsoft's security chief says frontier AI models cannot be trusted because they are unpredictable. The company is now treating the agents inside firms as potential insider risks.
The deal brings a San Francisco-founded startup's AI agents, which track studies and flag delays, into OpenAI's life-sciences push. Terms and product timing were not disclosed.