OpenAI has officially launched GPT-4.5, its most advanced AI language model to date. Currently, ChatGPT Pro users and developers worldwide can access the model as part of a study preview.
A Competitive Landscape
The release of GPT-4.5 comes amid growing competition from rival models like DeepSeek-R1, pushing AI companies to accelerate innovation.
OpenAI CEO Sam Altman took to social media platform X to express his thoughts on the model, calling it the first AI that truly feels like “speaking with a considerate person.” He shared, “I have had several moments where I’ve sat back in my chair and been astonished at getting actually good advice from an AI.”
Altman further described GPT-4.5 as “giant and expensive”, clarifying that while it may not outperform previous models in benchmarks, it introduces a new kind of intelligence that he finds magical.
What’s New in GPT-4.5?
According to OpenAI, early testing indicates that GPT-4.5 offers a more intuitive and natural user experience. The model is particularly effective in areas such as:
- Writing assistance
- Programming support
- Real-world problem-solving
Its enhancements stem from:
- A larger knowledge base
- Better alignment with user intent
- Improved emotional intelligence
Additionally, OpenAI states that GPT-4.5 significantly reduces hallucinations—instances where AI generates inaccurate or illogical responses.
Not a Frontier AI Model
Despite its advancements, OpenAI does not classify GPT-4.5 as a frontier AI model. Unlike models such as O1 or O3-mini, GPT-4.5 refines user experience and computational efficiency rather than introducing entirely new capabilities.
The model was developed using a mix of traditional AI training methods like reinforcement learning from human feedback (RLHF) and supervised fine-tuning. This has resulted in an AI that is not only more reliable but also better suited for collaborative projects, thanks to its ability to engage in emotionally nuanced interactions.
Who Can Access GPT-4.5?
Initially, GPT-4.5 is available to ChatGPT Pro users and developers. Over the next few weeks, OpenAI will extend access to:
- Plus and Team users
- Enterprise and Education users
Additionally, the model is now integrated into Microsoft’s Azure AI Foundry platform, expanding its accessibility to business clients.
As AI continues to evolve, GPT-4.5 marks another step forward in OpenAI’s mission to create more human-like and capable AI models.
