OpenAI unveils GPT-4.5 for ChatGPT—Bigger, smarter, and more powerful

OpenAI has launched a research preview of its latest AI model, GPT-4.5, for ChatGPT Pro users and developers worldwide. The company plans to extend access to ChatGPT Plus and Team users next week, followed by Enterprise and Edu users.

According to OpenAI, GPT-4.5 enhances pattern recognition, improves creative insights, and demonstrates greater emotional intelligence. The model also significantly reduces hallucination rates—a common issue where AI generates false information. At 37.1%, GPT-4.5’s hallucination rate is lower than GPT-4o’s 61.8% and its o1 reasoning model’s 44%.