IBL News | New York
OpenAI announced the release of GPT‑4.5, its largest model to date, trained on Microsoft Azure AI supercomputers, as a research preview. Subscribers to ChatGPT Pro, OpenAI’s $200-a-month plan, can access the service now.
OpenAI CEO Sam Altman said that the company was forced to stagger the rollout of its newest model, GPT-4.5, because OpenAI is “out of GPUs.”
GPT-4.5 is ready!
good news: it 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.
bad news: it is a giant, expensive model. we…
— Sam Altman (@sama) February 27, 2025
The San Francisco-based research lab explained that GPT‑4.5 has “an improved ability to recognize patterns, draw connections, and generate creative insights without reasoning.”
“Early testing shows that interacting with GPT‑4.5 feels more natural. Its broader knowledge base, improved ability to follow user intent, and greater “EQ” make it useful for tasks like improving writing, programming, and solving practical problems. We also expect it to hallucinate less.”
Compared to OpenAI o1 and OpenAI o3‑mini, GPT‑4.5 is a more general-purpose, innately smarter model.
OpenAI believes reasoning will be a core capability of future models and the two approaches to scaling—pre-training and reasoning—will complement each other.
GPT-4.5 is wildly expensive to run, OpenAI says. The company is charging $75 per million tokens (~750,000 words) fed into the model and $150 per million tokens generated by the model. That’s 30x the input cost and 15x the output cost of OpenAI’s workhorse GPT-4o model.
Compare that to GPT-4o, which costs just $2.50 per million input tokens and $10 per million output tokens.
