OpenAI has halted the free version of its in-app image generator, powered by GPT-4o reasoning model.Users started sharing images in the style of Studio Ghibli, leading to OpenAI reconsidering its rollout strategy.OpenAI CEO, Sam Altman, changed his profile picture to a Studio Ghibli style image, but the update is delayed for the free tier of ChatGPT.The GPT-4o reasoning model uses an autoregressive approach to generate sharp and coherent text and images.