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Phrase unfold shortly throughout the machine studying and AI group on the social community X yesterday: OpenAI was sending builders an e mail notifying them that the corporate could be eradicating one in every of its largest and strongest giant language fashions (LLMs), GPT-4.5 Preview, from the official OpenAI utility programming interface (API) on July 14, 2025.
Nevertheless, as an OpenAI spokesperson informed VentureBeat by way of e mail, GPT-4.5 Preview will stay an choice to particular person ChatGPT customers via the dropdown mannequin selector menu on the prime of the applying.
Nevertheless it stil implies 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 out there on this platform), now want to modify over to a different one in every of OpenAI’s almost 40 (!!!) completely different mannequin choices nonetheless out there via the API.
The information shortly unfold on X, the place builders and AI fanatics posted reactions starting from disappointment to confusion.
Some described GPT-4.5 as a day by day software 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 one in every of my fav fashions,” wrote @BumrahBachi.
Ben Hyak, the co-founder of AI observability and efficiency monitoring platform Raindrop.AI, known as the transfer “tragic,” including: “o3 + 4.5 are the fashions I exploit essentially the most on a regular basis.”
One other person, @flowersslop requested bluntly, “what was the aim of this mannequin all alongside?”
Deprecation had been deliberate since April
Regardless of the sturdy response, OpenAI had in actual fact 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 growth, 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 e mail was merely a scheduled reminder and that there are presently no plans to take away GPT-4.5 from ChatGPT subscriptions, the place the mannequin stays out there.
Group hypothesis on value and mannequin technique
Nonetheless, the developer-facing deprecation leaves a niche for some customers, particularly those that had constructed workflows or merchandise round GPT-4.5’s particular traits.
Some locally speculated that prime compute prices might need influenced the transfer, noting that comparable modifications had occurred with prior fashions.
Others referenced latest API pricing updates, together with a serious discount in value 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 “greatest non reasoning mannequin for open ai on all benchmarks and it’s apparent,” and predicted that OpenAI will “they add take a look at time compute it’s going to blow o3 out of the water. With a view to scale TTC you’ll want to scale pre coaching”
The top 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.
