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Phrase unfold rapidly throughout the machine studying and AI neighborhood on the social community X yesterday: OpenAI was sending builders an electronic mail notifying them that the corporate could be eradicating certainly one of its largest and strongest giant language fashions (LLMs), GPT-4.5 Preview, from the official OpenAI software programming interface (API) on July 14, 2025.
Nonetheless, as an OpenAI spokesperson advised VentureBeat by way of electronic mail, GPT-4.5 Preview will stay an choice to particular person ChatGPT customers by the dropdown mannequin selector menu on the high of the appliance.
However it stil signifies that any third-party builders who had constructed functions or workflows atop GPT-4.5 preview (we’ll name it GPT-4.5 from right here on out for simplicity’s sake, since a full GPT-4.5 was by no means made obtainable on this platform), now want to change over to a different certainly one of OpenAI’s practically 40 (!!!) totally different mannequin choices nonetheless obtainable by the API.
The information rapidly unfold on X, the place builders and AI lovers posted reactions starting from disappointment to confusion.
Some described GPT-4.5 as a every day device of their workflow, praising its tone and reliability. Others questioned the rationale behind launching the mannequin within the first place if it was going to be short-lived.
“That is unhappy — GPT-4.5 is certainly one of my fav fashions,” wrote @BumrahBachi.
Ben Hyak, the co-founder of AI observability and efficiency monitoring platform Raindrop.AI, referred to as the transfer “tragic,” including: “o3 + 4.5 are the fashions I take advantage of probably the most on a regular basis.”
One other consumer, @flowersslop requested bluntly, “what was the aim of this mannequin all alongside?”
Deprecation had been deliberate since April
Regardless of the robust response, OpenAI had in truth already introduced the plan to deprecate GPT-4.5 Preview again in April 2025 throughout the launch of GPT-4.1.
At the moment, the corporate acknowledged that builders would have three months to transition away from 4.5. OpenAI framed the mannequin as an experimental providing that supplied insights for future improvement, and mentioned it might carry ahead learnings from GPT-4.5 into future iterations — significantly in areas like creativity and writing nuance.
In a follow-up response to VentureBeat, OpenAI communications confirmed that the June electronic mail was merely a scheduled reminder and that there are at present no plans to take away GPT-4.5 from ChatGPT subscriptions, the place the mannequin stays obtainable.
Neighborhood hypothesis on price and mannequin technique
Nonetheless, the developer-facing deprecation leaves a spot for some customers, particularly those that had constructed workflows or merchandise round GPT-4.5’s particular traits.
Some in the neighborhood speculated that prime compute prices might need influenced the transfer, noting that comparable modifications had occurred with prior fashions.
Others referenced current API pricing updates, together with a significant discount in price for GPT-3.5 (internally known as o3), which is now priced 80% decrease than earlier than.
Person @chatgpt21 commented that GPT-4.5 is the “finest non reasoning mannequin for open ai on all benchmarks and it’s apparent,” and predicted that OpenAI will “they add check time compute it can blow o3 out of the water. With a view to scale TTC that you must scale pre coaching”
The tip of the highway for GPT-4.5 by way of API — builders inspired emigrate to GPT-4.1
OpenAI has directed builders to its on-line discussion board for questions on migrating to GPT-4.1 or different fashions. With the API shutdown for GPT-4.5 Preview set for mid-July, groups counting on the mannequin now have lower than a month to finish that transition.
