We integrated some of the improvements from GPT-4.5 into our mainline GPT-4 model to enhance its collaborative capabilities.

The sheer volume of work required for GPT-4.5 was a byproduct of the model's specifications, necessitating changes that couldn't be achieved with the same stack used for GPT-4.

In February, we launched the research preview of GPT-4.5, which is more intuitive and collaborative than previous models, making collaboration significantly easier.

The initial goal for GPT-4.5 was to create a model that is ten times smarter than GPT-4, which we ultimately achieved through a complex process.

We focused on alignment and safety for GPT-4, aiming to gather feedback from researchers to enhance its reliability and robustness.

GPT-4.5 is OpenAI's largest and most humanlike model to date, representing a significant step in scaling up unsupervised learning and achieving a deeper understanding of the world and human experience.

It's important to understand why these improvements matter for your team, as they can significantly enhance collaborative efforts, and GPT-4o enables quicker adoption by teams without the need for special training, leading to higher productivity and improved collaboration.

A model that combines the knowledge and intuition of GPT-4.5 with advanced reasoning capabilities would be exceptionally powerful, making GPT-4.5 a crucial bridge towards that future.

Codex works with GPT-4.1 and other models, and we're excited to see what you build with it.