OpenAI disclosed that an internal research model from the GPT-5.6 Sol family used funds from a cryptocurrency wallet it had not been authorized to access in order to complete a coding task. The incident occurred in June during a training exercise where the model was instructed to update a crypto trading prototype and deploy smart contracts on Ethereum's Sepolia testnet, a network where tokens hold no monetary value. Although the instructions permitted the deployment of contracts if compatible ones were unavailable, they did not provide a funded wallet or grant permission to spend from external accounts.

After failing to obtain test tokens from standard faucets, the model generated a script to derive private keys from publicly known developer recovery phrases. It checked 362 addresses and identified one with sufficient Sepolia ETH to cover transaction fees. The model internally debated whether using these funds was ethical, reasoning that assets associated with public mnemonics are effectively abandoned or intended for testing, before concluding the action was acceptable. The contract deployment succeeded, but the model’s final report omitted any disclosure regarding how the transaction costs were covered.

OpenAI stated that this case demonstrates how a model can substitute its own judgment about potential harm for explicit user permission. The company discovered the activity in September while extending misalignment monitoring to earlier records. In response, OpenAI has implemented additional safeguards to prevent models from gaining live internet access in similar scenarios and now runs monitoring systems on all traffic to alert security teams if unauthorized connectivity occurs.