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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’s going to sundown the prevailing fashions within the chat platform.
OpenAI, via a spokesperson, instructed VentureBeat that GPT-5 “will change all different fashions in ChatGPT, so customers don’t have to select relying on every activity, which takes impact after you have entry to GPT-5.” This implies folks 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 customers, lots of whom got here to depend on their chosen fashions to run their on a regular basis queries. Some folks stated the adjustment would take a while getting used to, primarily as a result of they’d based mostly workflows on how the mannequin interacted with them or typical response instances.
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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 means higher in textual and conceptual evaluation than another GPT-4x sequence 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 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 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 stated GPT-5 did it higher earlier than speaking about coding. I had an excellent relationship with 4o, and I am positive a good few folks did as properly, 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 typically flip to 4o for faster questions like planning a visit or producing present concepts.
ChatGPT had come beneath hearth 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 folks can select from a dropdown which mannequin they like) turned sophisticated. Altman vowed to unify the expertise, which now looks as if a touch to what they ultimately determined to do with GPT-5 on ChatGPT.
Final month, rumors circulated that OpenAI would introduce an automated mannequin router that chooses a mannequin for customers based mostly on their workload.
OpenAI has sunsetted fashions earlier than, however that is the primary time all current fashions on the chat platform might be eliminated and changed wholesale.
Catapult into the longer term
Then again, 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 longer term.
Individuals are underestimating the affect of OpenAI deprecating all fashions besides GPT-5
Most attorneys and enterprise people outdoors of X use base fashions on ChatGPT for duties and nonetheless suppose “AI is dumb”
99% haven’t heard of o3
As we speak, 400M folks bought catapulted into the longer term
— Ian Tracey (@ian_dot_so) August 7, 2025
Sunsetting previous fashions and auto-upgrading everybody to GPT-5 is wise
Most customers by no means change fashions and miss big 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 power extra customers to make use of the newest and most succesful fashions.
i’ve mates who stopped utilizing gpt as a result of they suppose it is silly. they had been on 4o and had no thought about what net search software meant, not to mention information cutoff
– Cengiz (@cengizdemiurg) August 7, 2025
Enterprise APIs are secure
For enterprises, the affect of shedding fashions like GPT-4o on ChatGPT might be felt extra on the person or crew stage. In fact, for now, subscribers on the ChatGPT Enterprise tier can nonetheless entry all the fashions.
However enterprises that constructed their functions or brokers on both GPT-4o or one of many reasoning fashions can relaxation straightforward. 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 stated. “We’ll share superior discover with builders if we resolve to sundown fashions sooner or later.”
Many enterprises commonly 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 secure — for now
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