OpenAI Releases 'Largest, Most Knowledgable' Model GPT-4.5 With Reduced Hallucinations And High API Price
VentureBeat, Thursday, February 27th, 2025
It's here: OpenAI has announced the release of GPT-4.5, a research preview of its latest and most powerful large language model (LLM) for chat applications. Unfortunately, it's far-and-away OpenAI's most expensive model (more on that below).
It's also not a 'reasoning model,' or the new class of models offered by OpenAI, DeepSeek, Anthropic and many others that produce 'chains-of-thought,' (CoT) or stream-of-consciousness-like text blocks in which they reflect on their own assumptions and conclusions to try and catch errors before serving up responses/outputs to users. It's still more of a classical LLM.
Nonetheless, acording to OpenAI co-founder and CEO Sam Altman's post on the social network X, GPT-4.5 is: 'The first model that feels like talking to a thoughtful person to me. I have had several moments where I've sat back in my chair and been astonished at getting actually good advice from an AI.'