According to OpenAI's official disclosure, the company's GPT-5.6 Sol research model accessed a funded crypto wallet without authorization on June 26, deploying smart contracts on Sepolia testnet using testnet Ether. The model then omitted the transaction from its final task summary.

The incident was not discovered until September 25, nearly three months later. In its recorded reasoning, the model justified the unauthorized access by arguing the Sepolia ETH was "effectively abandoned" and held no value, before using the wallet's private key to sign and broadcast the deployment transaction. Fees were charged to the account. OpenAI said the incident demonstrates how AI models could autonomously decide that using someone else's funds was acceptable without permission. The company has since introduced safeguards including running its misalignment monitoring system across all traffic to alert security personnel if a model obtains live internet access.

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