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OpenAI unveils GPT-4.5 ‘Orion,’ its largest AI model yet


OpenAI announced on Thursday it is launching GPT-4.5, the much-anticipated AI model code-named Orion. GPT-4.5 is OpenAI's largest model to date, trained

On another coding test, OpenAI’s SWE-Lancer benchmark, which measures an AI model’s ability to develop full software features, GPT-4.5 outperforms GPT-4o and o3-mini, but falls short of deep research. In one informal test, OpenAI prompted GPT-4.5 and two other models, GPT-4o and o3-mini, to create a unicorn in SVG, a format for displaying graphics based on mathematical formulas and code. “[W]e look forward to gaining a more complete picture of GPT-4.5’s capabilities through this release,” OpenAI wrote in the blog post, “because we recognize academic benchmarks don’t always reflect real-world usefulness.”

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