Its subscription plan, ChatGPT Plus, provides access to the latest GPT-4 and ChatGPT-4o models, which can offer significant advantages over the free version of ChatGPT., The GPT Store is a platform developed by OpenAI that enables users and developers to create, publish, and monetize GPTs without requiring advanced programming skills., GPT-4o ("o" for "omni") is a multilingual, multimodal generative pre-trained transformer developed by OpenAI and released in May 2024. [2] It can process and generate text, images and audio. [3][4] Upon release, GPT-4o was free in ChatGPT, though paid subscribers had higher usage limits. [5] GPT-4o was removed from ChatGPT in August 2025 when GPT-5 was released, but OpenAI reintroduced it for , This is the full chat transcript between a real 'Men's Health' reader and Chat GPT, with annotations by AI expert Gary Marcus., Original GPT model A generative pre-trained transformer (GPT) is a type of large language model (LLM) [1][2][3] that is widely used in generative AI chatbots. [4][5] GPTs are based on a deep learning architecture called the transformer. They are pre-trained on large datasets of unlabeled content, and able to generate novel content. [2][3] OpenAI was the first to apply generative pre-training , Dueling AI usage reports show ChatGPT dominates personal tasks while Claude leads in coding and business automation..