OpenAI's GPT-4.5 AI model comes to more ChatGPT users

OpenAI has begun rolling out its newest AI model, GPT-4.5, to users on its ChatGPT Plus tier. In a series of posts on X, OpenAI said that the rollout will take "1-3 days," and that it expects rate limits to change. GPT-4.5 launched first for subscribers to OpenAI's $200-a-month ChatGPT Pro plan last week. "We’d like to give everyone with access to GPT-4.5 a sizable rate limit, but we expect rate limits to change as we learn more about demand," the company wrote in a post. GPT-4.5 is OpenAI's lar