Confused by ChatGPT’s models? Here’s a detailed, user-tested guide comparing GPT-4o, GPT-4.1, GPT-4.5, and more — plus ...

Once a chat is inside a project, it will take on that project’s custom instructions and can reference any files you’ve ...

ChatGPT o3, which has been available via API, is now 80% cheaper for developers, and there's no visible impact on performance ...

ChatGPT Pro is 10 times the price of ChatGPT Plus. Is either plan worth the money, or should you stick with free? Here's how to decide.

OpenAI has released its GPT‑3.5 Turbo API to developers as of Monday, bringing back to life the base model that powered the ChatGPT chatbot that took the world by storm in 2022. It will now be ...

OpenAI's new o3-pro model replaces o1-pro in ChatGPT with better reasoning, tool support, and higher accuracy.