OpenAI Officially Launches GPT-4.5 with Improved Knowledge and Personality

OpenAI has officially launched GPT-4.5, a significant upgrade that refines its AI capabilities with better knowledge, enhanced writing skills, and a more pronounced personality. While not a “frontier model,” GPT-4.5 represents an iterative step forward rather than a groundbreaking leap. The AI community has been eagerly awaiting OpenAI’s next move after its Shipmas event last year, and while GPT-5 remains months away, GPT-4.5 is now available—though only for those on the $200/month ChatGPT Pro plan.

According to OpenAI, GPT-4.5 is their “most knowledgeable model yet,” promising deeper contextual understanding and improved conversational fluidity. This model also emphasizes personality, making interactions feel even more human-like. However, OpenAI has only released a research preview of GPT-4.5, meaning it is still being fine-tuned. Users might notice inconsistencies in performance compared to OpenAI’s o1 or o3 mini models. Despite this, the introduction of GPT-4.5 sets the stage for continued advancements leading up to GPT-5.

While GPT-4.5 isn’t a complete revolution, its improved intelligence and nuanced communication abilities mark an important step in AI development. With OpenAI steadily refining its models, the AI landscape is evolving at an unprecedented pace, keeping competitors and enthusiasts on their toes.