OpenAI Releases GPT-4.5 [Video]

OpenAI has announced the release of GPT-4.5, its largest and best model for chat, as a research preview.

GPT‑4.5 is a step forward in scaling up pre-training and post-training. By scaling unsupervised learning, GPT‑4.5 improves its ability to recognize patterns, draw connections, and generate creative insights without reasoning.

According to the company, early testing indicates that GPT-4.5 will feel more natural. It has a broader knowledge base and improved ability to follow user intent. Greater 'EQ' makes it useful for tasks like improving writing, programming, and solving practical problems. Additionally, it should hallucinate less.




The new model is being released as a research preview to better understand its strengths and limitations. "We're still exploring what it's capable of and are eager to see how people use it in ways we might not have expected," said OpenAI.

The SimpleQA Accuracy of GPT-4.5 is significantly higher than previous models. It scored 62.5% in accuracy, compared to GPT-4o at 38.2%, o1 at 47%, and o3-mini at 15%.

The model's hallucination rate is also much better than previous models. It hallucinated 37.1% of the time, compared to 4o at 61.8%, o1 at 44%, and o3-mini at 80.3%.


GPT‑4.5 doesn't think before it responds, which makes its strengths particularly different from reasoning models like OpenAI o1. Compared to OpenAI o1 and OpenAI o3‑mini, GPT‑4.5 is a more general-purpose, innately smarter model.

How to use GPT-4.5 in ChatGPT
Starting today, ChatGPT Pro users will be able to select GPT‑4.5 in the model picker on web, mobile, and desktop. It will begin rolling out to Plus and Team users next week, then to Enterprise and Edu users the following week.

GPT‑4.5 has access to the latest up-to-date information with search, supports file and image uploads, and can use canvas to work on writing and code. However, GPT‑4.5 does not currently support multimodal features like Voice Mode, video, and screensharing in ChatGPT. In the future, we will work to simplify the user experience so AI "just works" for you.

Take a look at the video below or hit the link for more details!

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