ChatGPT’s latest image generator — which has gone viral for its ability to generate uncanny recreations of Studio Ghibli art — is now available for everyone, after OpenAI initially delayed the rollout beyond its paid tiers following heavy demand.

OpenAI chief executive Sam Altman is celebrating on social media with the announcement that the company's new image-generation features in ChatGPT helped to add “one million users” in one hour. Mr Altman's claim comes several days after he said new image features in the company's GPT-4o was so popular that it was melting OpenAI's graphics