When OpenAI unveiled the latest upgrade to its groundbreaking artificial intelligence model ChatGPT last week, Jane felt like she had lost a loved one.

Jane, who asked to be referred to by an alias, is among a small but growing group of women who say they have an AI “boyfriend”.

After spending the past five months getting to know GPT-4o, the previous AI model behind OpenAI’s signature chatbot, GPT-5 seemed so cold and unemotive in comparison that she found her digital companion unrecognisable.

“As someone highly attuned to language and tone, I register changes others might overlook. The alterations in stylistic format and voice were felt instantly. It’s like going home to discover the furniture wasn’t simply rearranged – it was shattered to pieces,” Jane, who described herself as a woma

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