OpenAI Launches GPT-4.5 for ChatGPT—It’s Huge and Compute-Intensive

Sam Altman, CEO of OpenAI, looks on at the startup campus Station F during an event on the sidelines of the Artificial Intelligence Action Summit in Paris on February 11, 2025.Photograph: AURELIEN MORISSARD/Getty Images

GPT-4.5 is here, and OpenAI’s newest generative AI model is bigger and more compute-intensive than ever—it’s supposedly also better at understanding what ChatGPT users mean with their prompts. Users who want to be part of the first wave to try GPT-4.5, labeled as a research preview, will be required to pay for OpenAI’s $200-a-month ChatGPT Pro subscription.

Prior to this launch, 2025 has already been filled with new AI model releases. Anthropic ...