I.T. News – Feb 27, 2025

1 - OpenAI releases GPT-4.5 claiming 10X efficiency over GPT-4, but says it’s ‘not a frontier model’

Venture Beat. Feb 27, 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 — yet pointedly, the company says specifically in the model’s system card (a report outlining its capabilities, which leaked early online and is attached to the bottom of this piece) that “GPT-4.5 is not a frontier model, but it is OpenAI’s largest LLM, improving on GPT-4’s computational efficiency by more than 10x.”

It’s also not a “reasoning model,” the new class of models offered by OpenAI, DeepSeek, Anthropic and many others that produce “chains-of-thought,” 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. It’s also, perplexingly, far-and-away OpenAI’s most expensive model (more on that below).

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.”

However, he cautioned that the company is bumping up against the upper end of its supply of graphics processing units (GPUs) and has had to limit access as a result:

“bad news: it is a giant, expensive model. 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. we will add tens of thousands of GPUs next week and roll it out to the plus tier then. (hundreds of thousands coming soon, and i’m pretty sure y’all will use every one we can rack up.)

this isn’t how we want to operate, but it’s hard to perfectly predict growth surges that lead to GPU shortages.“

Starting today, GPT-4.5 is available to subscribers of OpenAI’s most expensive subscription tier, ChatGPT Pro ($200 USD/month), and developers across all paid API tiers, with plans to expand access to the far less costly Plus and Team tiers ($20/$30 monthly) next week.

GPT‑4.5 is able to access search and OpenAI’s ChatGPT Canvas mode, and users can upload files and images to it, but it doesn’t have other multimodal features like Voice Mode, video, and screensharing — yet.

OpenAI is hosting a livestream event today at 12 pm PT/ 3 pm ET, where OpenAI researchers will discuss the model’s development and capabilities.

Advancing AI with unsupervised learning

GPT-4.5 represents a step forward in AI training, particularly in unsupervised learning, which enhances the model’s ability to recognize patterns, draw connections, and generate creative insights.

During the livestream, OpenAI researchers noted how it was trained on data generated by smaller AI models and that this improved its “world model.” They also stated it was pre-trained across multiple data centers concurrently, suggesting a decentralized approach similar to that of rival lab Nous Research.

This training regimen apparently helped GPT-4.5 learn to produce more natural and intuitive interactions, follow user intent more accurately, and demonstrate greater emotional intelligence.

The model builds on OpenAI’s previous work in AI scaling, reinforcing the idea that increasing data and compute power leads to better AI performance.

Compared to its predecessors, GPT-4.5 is expected to produce fewer hallucinations, making it more reliable across a broad range of topics.

What makes GPT-4.5 stand out?

According to OpenAI, GPT-4.5 is designed to create warm, intuitive, and naturally flowing conversations. It has a stronger grasp of nuance and context, enabling more human-like interactions and a greater ability to collaborate effectively with users.

The model’s expanded knowledge base and improved ability to interpret

Episode 4252 - Feb 28 - Tiếng Anh - Công nghệ Thông tin – Ngày 27 tháng 2, 2025 - Vina Technology at AI time

Vina Technology at AI time - Công nghệ Việt Nam thời AI

Episode 4252 - Feb 28 - Tiếng Anh - Công nghệ Thông tin – Ngày 27 tháng 2, 2025 - Vina Technology at AI time