The maker of ChatGPT has said the suicide of a 16-year-old was down to his “misuse” of its system and was “not caused” by the chatbot.

The comments came in OpenAI’s response to a lawsuit filed against the San Francisco company and its chief executive, Sam Altman, by the family of California teenager Adam Raine.

Raine killed himself in April after extensive conversations and “months of encouragement from ChatGPT”, the family’s lawyer has said.

The lawsuit alleges the teenager discussed a method of suicide with ChatGPT on several occasions, that it guided him on whether a suggested method would work, offered to help him write a suicide note to his parents and that the version of the technology he used was “rushed to market … despite clear safety issues”.

According to filings at the s

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