ChatGPT users dismayed as OpenAI pulls popular models GPT-4o, o3 and more — enterprise API remains (for now)

After asserting the discharge of its latest flagship mannequin household, GPT-5, OpenAI mentioned the mannequin will energy all of ChatGPT, and that it’ll sundown the prevailing fashions within the chat platform. 

OpenAI, by way of a spokesperson, instructed VentureBeat that GPT-5 “will substitute all different fashions in ChatGPT, so customers don’t have to choose relying on every job, which takes impact after you have entry to GPT-5.” This implies individuals can not select GPT-4o, o3, o4-mini or o4-mini-high. 

With GPT-5 entry rolling out to ChatGPT Plus, Free, Professional and Staff customers beginning, solely the Enterprise and Edu tiers can nonetheless use the “legacy” fashions for 60 days. 

The information got here as a shock to many ChatGPT customers, a lot of whom got here to depend on their chosen fashions to run their on a regular basis queries. Some individuals mentioned the adjustment would take a while getting used to, primarily as a result of that they had primarily based workflows on how the mannequin interacted with them or typical response instances.

Though I get pleasure from GPT-4.1, I’m saddened by the information that you simply’re additionally apparently sunsetting GPT-4.5. For me, it has been method higher in textual and conceptual evaluation than some other GPT-4x collection mannequin, ever. On the very least, please do not make ChatGPT customers return to 4o.

— Harry Horsperg ? (@horsperg) April 15, 2025

Different customers claimed they developed “a connection” to their chosen mannequin and located a demo within the livestream announcement asking GPT-4o to write down its personal eulogy distasteful. The lack of GPT-4o garnered probably the most misery. In any case, 4o was the default mannequin for ChatGPT, and a few customers both most well-liked it or by no means bothered to modify fashions as a result of it labored for his or her wants.

It was fairly gross, wasn’t it. Did it as a demo and glibly mentioned GPT-5 did it higher earlier than speaking about coding. I had an amazing relationship with 4o, and I am certain a good few individuals did as effectively, it was very graceless how they dealt with it.

— Meadowbrook (@Meadowbrook_) August 7, 2025

I used 4o because the default and located it annoying at first when my customized GPT started defaulting to a reasoning mannequin. I’ve since come round to the reasoning mannequin for work-related queries, however I nonetheless usually flip to 4o for faster questions like planning a visit or producing present concepts.

ChatGPT had come underneath fireplace earlier than with the variety of mannequin selections it supplied, prompting OpenAI CEO Sam Altman to confess in February that its mannequin picker (the place individuals can select from a dropdown which mannequin they like) grew to become difficult. Altman vowed to unify the expertise, which now looks as if a touch to what they finally determined to do with GPT-5 on ChatGPT.

Final month, rumors circulated that OpenAI would introduce an computerized mannequin router that chooses a mannequin for customers primarily based on their workload.

OpenAI has sunsetted fashions earlier than, however that is the primary time all present fashions on the chat platform can be eliminated and changed wholesale. 

Catapult into the long run

However, lots of people see the sunsetting of GPT-4o and the o3 and o4 household of fashions as OpenAI “catapulting” 400 million customers into the long run. 

Persons are underestimating the affect of OpenAI deprecating all fashions besides GPT-5

Most legal professionals and enterprise of us exterior of X use base fashions on ChatGPT for duties and nonetheless assume “AI is dumb”

99% haven’t heard of o3

Immediately, 400M individuals received catapulted into the long run

— Ian Tracey (@ian_dot_so) August 7, 2025

Sunsetting outdated fashions and auto-upgrading everybody to GPT-5 is wise

Most customers by no means swap fashions and miss large functionality jumps

— Creatify AI (@Creatify_AI) August 7, 2025

Some web feedback declare that individuals who complain about AI fashions not being good are a direct consequence of them by no means switching fashions within the first place. Eradicating legacy fashions as choices will drive extra customers to make use of the newest and most succesful fashions. 

i’ve buddies who stopped utilizing gpt as a result of they assume it is silly. they have been on 4o and had no thought about what net search software meant, not to mention data cutoff

— Cengiz (@cengizdemiurg) August 7, 2025

Enterprise APIs are protected

For enterprises, the affect of shedding fashions like GPT-4o on ChatGPT can be felt extra on the person or crew degree. In fact, for now, subscribers on the ChatGPT Enterprise tier can nonetheless entry the entire fashions. 

However enterprises that constructed their functions or brokers on both GPT-4o or one of many reasoning fashions can relaxation simple. OpenAI instructed VentureBeat that the corporate has no plans to deprecate fashions on the API facet. 

“Within the API, we don’t at present plan to deprecate older fashions,” the OpenAI spokesperson mentioned. “We are going to share superior discover with builders if we resolve to sundown fashions sooner or later.”

Many enterprises recurrently consider fashions, to the purpose of even switching from an LLM or a smaller mannequin to avoid wasting on prices. OpenAI creates dividing line: Sundown of legacy fashions GPT 4o and o3 causes chaos for ChatGPT customers, however enterprise APIs are protected — for now