Sam Altman says OpenAI's new ChatGPT-4.5 is a more emotionally intelligent model but warns that it's 'expensive' to train and run

• OpenAI released GPT-4.5 on Thursday.
• The model is designed to be more general-purpose than OpenAI's STEM-focused reasoning models.
• OpenAI says it's best for "tasks like writing, programming, and solving practical problems."

On Thursday, OpenAI released what it claims to be its largest and most powerful model to date: GPT-4.5.

OpenAI CEO Sam Altman described it as "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," in a post on X on Thursday.

Altman added in his post that the model will be "giant" and "expensive." For now, the company is only releasing it in a research preview to ChatGPT Pro users and developers in the API. OpenAI is working to bring it to ChatGPT Plus, Team, and Edu users starting next week, Amelia Glaese, a member of OpenAI's technical staff, said in a live stream announcing the news.

"we really wanted to launch it to plus and pro at the same time, but we've been growing a lot and are out of GPUs," Altman wrote. "We will add tens of thousands of GPUs next week and roll it out to the plus tier then."

In the livestreamed demonstration of GPT-4.5's abilities, Glaese said GPT-4.5 is the latest advancement of OpenAI's "unsupervised learning" paradigm which focuses on scaling up models on "word knowledge, intuition, and reducing hallucinations."

Its o1 series of reasoning models, which it released last year, are designed to think before responding and are better suited for quantitative tasks.

Picks up better on social cues

In practice, GPT-4.5 is the most natural conversationalist and emotionally intelligent of OpenAI's models. It responds more adeptly to social cues than OpenAI's STEM-focused reasoning model, o1 as a function of its greater knowledge base and stronger contextual understanding.

Raphael Lopes, a member of OpenAI's technical staff, demonstrated how GPT-4.5 would reframe an angry text to a friend with more tact than o1.

Trained on "vibes"

GPT-4.5 is aligned to be a "better collaborator" so conversations with it feel "warmer, more intuitive and emotionally nuanced," Lopes said. OpenAI tested GPT-4.5 against 4o, a multimodal model it released in May, on "vibes" test set that measures creative intelligence and emotional intelligence.

Fewer hallucinations

GPT-4.5 outperforms other models in accuracy and produces significantly fewer hallucinations.

The model's "knowledge base, stronger alignment with user intent, and improved emotional intelligence make it well-suited for tasks like writing, programming, and solving practical problems" OpenAI said in the GPT-4.5 System Card published on Thursday.

OpenAI did not immediately respond to Business Insider's request for a comment.

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