OpenAI has officially launched GPT-4.5, a new AI model known by the codename ‘Orion’. OpenAI unveils GPT-4.5 ‘Orion’ as its latest AI model, claiming improvements in accuracy and reasoning. This latest version is the company’s most advanced model to date, trained with significantly higher computing power and data than its predecessors.

In early tests, its hallucination rate, where AI systems generate inaccurate information, was 37 per cent compared with nearly 60 per cent on its predecessor GPT-4o. With GPT-4.5, OpenAI is continuing to bet on big,