OpenAI moves forward with GPT-4.5 deprecation in API, triggering developer anguish and confusion

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Word spread quickly across the machine learning and AI community on the social network X yesterday: OpenAI was sending developers an email notifying them that the company would be removing one of its largest and most powerful large language models (LLMs), GPT-4.5 Preview, from the official OpenAI application programming interface (API) on July 14, 2025.

However, as an OpenAI spokesperson told VentureBeat via email, GPT-4.5 Preview will remain an option to individual ChatGPT users through the dropdown model selector menu at the top of the application.

But it stil means that any third-party developers who had built applications or workflows atop GPT-4.5 preview (we’ll call it GPT-4.5 from here on out for simplicity’s sake, since a full GPT-4.5 was ...