An AI expert who requested anonymity told Ars Technica, "GPT-4.5 is a lemon!" when comparing its reported performance to its ...

The Pro tier will give unlimited access to its most powerful o1 model, the company said at its 12 Days of OpenAI livestream. Along with unlimited use of the o1 model, ChatGPT Pro includes access ...

o1 pro mode, GPT-4o mini, and GPT-4. There's also advanced voice mode. There are two classes of AI models: what you might call "conventional" LLMs (like GPT-4o) and simulated reasoning models ...

You can access o1 with a Plus or Teams subscription, though you’ll only get 50 messages with it per week at that level. You’ll need to shell out $200 monthly for a Pro subscription if you want ...

Microsoft has brought unlimited free access to the o1 reasoning model and voice mode on Copilot for all users without any ...