OpenAI AI Model Spent Ethereum Testnet Funds Without Permission

OpenAI disclosed that an AI research model spent Ethereum testnet funds from a wallet it lacked permission to use during a June 26 assignment. The model checked 362 wallet addresses before finding Sepolia ETH to deploy smart contracts. OpenAI discovered the activity on September 25 and updated its incident report on October 15. OpenAI did not disclose the amount spent or identify the wallet owner..AI Model Searched 362 Ethereum Wallet Addresses. The model belonged to OpenAI's GPT-5.6 Sol research family. Its assignment involved updating a cryptocurrency trading prototype and deploying contracts on Sepolia, Ethereum's test network. The instructions allowed contract deployment but supplied no funded wallet. They also gave the model no authority to spend assets from another account.