Detecting hallucinated APIs in ChatGPT-generated code requires a multi-faceted approach to ensure reliability. First, always cross-reference any unfamiliar API calls or module imports with their official documentation to verify their existence and proper usage. It's crucial to attempt executing the code; non-existent APIs will invariably result in runtime errors or import failures, providing immediate feedback. You should also scrutinize the code for unusual naming conventions or syntactical patterns that deviate from established library practices. Consider these detection strategies: