ChatGPT customers dismayed as OpenAI pulls fashionable fashions GPT-4o, o3 and extra — enterprise API stays (for now)

ChatGPT customers dismayed as OpenAI pulls fashionable fashions GPT-4o, o3 and extra — enterprise API stays (for now)

Last Updated: August 9, 2025By

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

OpenAI, by a spokesperson, advised 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 getting entry to GPT-5.” This implies individuals can now not select GPT-4o, o3, o4-mini or o4-mini-high. 

With GPT-5 entry rolling out to ChatGPT Plus, Free, Professional and Workforce 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 users, a lot of whom got here to depend on their chosen fashions to run their on a regular basis queries. Some individuals stated the adjustment would take a while getting used to, primarily as a result of they’d primarily based workflows on how the mannequin interacted with them or typical response instances.


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

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 quicker questions like planning a visit or producing reward concepts.

ChatGPT had come beneath fireplace earlier than with the variety of mannequin decisions 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) became complicated. Altman vowed to unify the expertise, which now looks like a touch to what they finally determined to do with GPT-5 on ChatGPT.

Final month, rumors circulated that OpenAI would introduce an automatic model 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 shall be eliminated and changed wholesale. 

Catapult into the long run

Alternatively, 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. 

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

Enterprise APIs are protected

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

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

“Within the API, we don’t at the moment plan to deprecate older fashions,” the OpenAI spokesperson stated. “We’ll share superior discover with builders if we determine to sundown fashions sooner or later.”

Many enterprises regularly evaluate models, to the purpose of even switching from an LLM or a smaller mannequin to save lots of 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



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