GPT-4.5, codenamed “Orion,” represents OpenAI’s latest advancement in large language models. Released on February 27, 2025, it’s designed to push the boundaries of AI capabilities, particularly in natural language processing and understanding. This model emphasizes improvements in fluency, coherence, and emotional tone, aiming to create more natural and intuitive interactions.
Key aspects of GPT-4.5 include:
Enhanced Natural Language Processing. GPT-4.5 excels in producing polished and refined text, making it particularly strong in storytelling, detailed responses, and empathetic interactions. It demonstrates improved ability to understand and interpret human intent, leading to more nuanced and contextually relevant responses. There is a focus on stronger “EQ” or emotional intelligence, allowing for more sensitive and appropriate interactions.
Technical Improvements. It is the result of scaling up unsupervised learning, utilizing increased compute and data, along with architectural and optimization innovations. Trained on Microsoft Azure AI supercomputers, GPT-4.5 possesses a broader knowledge base and deeper understanding of the world, resulting in reduced hallucinations and increased reliability. It has shown improvements in benchmarks relating to scientific knowledge, and factual accuracy.
Usage and Accessibility. GPT-4.5 is accessible to ChatGPT Pro users, with plans to expand availability to other tiers. It can also be accessed through the OpenAI API. It has access to up to date information with search, and supports file and image uploads, and can use canvas within ChatGPT.
Limitations and Considerations. While GPT-4.5 excels in language fluency and natural conversation, it shows limitations in complex reasoning and problem-solving compared to specialized reasoning models. It is a very expensive model to run, and thus the API costs are very high. Reports indicate that in some cases it can underperform GPT-4o, when it comes to following instruction.
Links
Announcement: Introducing GPT-4.5 | OpenAI
