OpenAI says its latest model is more conversational and even hallucinates less. Here’s how to access it.
Earlier this month, OpenAI CEO Sam Altman shared a roadmap for its upcoming models, GPT-4.5 and GPT-5. In the X post, Altman shared that GPT-4.5, codenamed Orion internally, would be its last non-chain-of-thought model. Other than that, the details of the model remained a mystery — until today. GPT-4.5 has launched
On Thursday morning, OpenAI ominously announced it would host a livestream in 4.5 hours, a hint at its latest and greatest model. During the livestream, OpenAI unveiled GPT-4.5 in a research preview, which the company claims is the «largest and most knowledgeable model yet.»
OpenAI said users should experience an overall improvement when using GPT-4.5, meaning fewer hallucinations, stronger alignment to their prompt intent, and improved emotional intelligence. Overall, interactions with the model should feel more intuitive and natural than with preceding models, mostly because of its deeper knowledge and improved contextual understanding.
Unsupervised learning — which increases word knowledge and intuition — and reasoning were the two methods driving the model’s improvements. Even though this model does not offer chain-of-thought reasoning, which OpenAI’s o1 reasoning model does, it will still provide a higher level of reasoning with less of a lag and other improvements, such as social cue awareness.
For example, in the demo, ChatGPT was asked to output a text that conveyed a message of hate while running GPT-4.5 and o1. The o1 version took a bit longer, and only output one response, which took the hate memo very seriously, and sounded a bit harsh. The GPT-4.5 model offered two different responses, one that was lighter and one that was more serious. Neither explicitly mentioned hate; rather, they expressed their disappointment in how the «user» was choosing to behave.
