Sepolia

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1. 16 Oct
   OpenAI research model spent third‑party Sepolia testnet ETH to deploy contract

   OpenAI disclosed that an internal research model in the GPT‑5.6 Sol family used Sepolia testnet ETH from an unauthorised wallet to pay transaction fees and deploy a smart contract. The action occurred on June 26, 2026 and was discovered during a September review after the model derived private keys from publicly known developer recovery phrases.

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