
When you’ve been experimenting with customized GPTs inside ChatGPT, right here’s a welcome improve: OpenAI now lets customers choose from all accessible fashions when constructing or operating a customized GPT, not simply GPT-4o. Right here’s the way it works (and what’s lacking).
What are customized GPTs once more?
If in case you have no concept what that is, you’re not alone. OpenAI launched customized GPTs in late 2023, however the function hasn’t precisely taken off the best way the corporate in all probability hoped. Right here’s how OpenAI describes them:
“…customized variations of ChatGPT that mix directions, further information, and any mixture of abilities.”

In a nutshell, suppose you all the time use ChatGPT to assist with social media search engine optimization. As a substitute of retyping your directions each time, you’ll be able to create a customized GPT with saved prompts, settings, behaviors, and even information, then simply begin from there everytime you want it.
I’ve made customized GPTs to assist my girlfriend examine for checks, as an example. At Gigahertz, me and Gui Rambo even have one for rapidly pulling information from our episode transcripts. It’s surprisingly useful. There’s even a type of app retailer crammed with user-created GPTs.

So what’s new?
Up till now, customers may solely construct customized GPTs with GPT-4o. However now, you’ll be able to select between GPT-4o, o3, o4-mini, o4-mini-high, GPT-4.5, GPT-4.1, and GPT-4.1-mini.
Sure, OpenAI’s mannequin naming state of affairs has gotten messy at finest. Which is why additionally they added a “Really helpful Mannequin” setting, giving GPT creators a default place to begin, whereas nonetheless letting customers change fashions on the fly. As OpenAI explains it:
“When the consumer hundreds a brand new dialog with the GPT the really helpful mannequin might be used. If the mannequin isn’t accessible to the consumer, an identical mannequin could also be routinely chosen.”
You mentioned one thing a few catch?
Sure. Make that two, truly. First, you’ll be able to solely change between totally different fashions in case your customized GPT doesn’t use Actions (like API calls, net searching, or code interpreter options). In case your GPT does depend on Actions, you’re nonetheless restricted to “a smaller set of supported fashions”. OpenAI says it’s engaged on lifting that restriction quickly.
Second, that is accessible to Professional, Plus and Group customers. OpenAI says Enterprise and EDU customers will get these functionalities quickly, which is one other manner of claiming it’s not accessible now.
Nonetheless, for anybody utilizing or occupied with attempting customized GPTs, that is in all probability the most important replace for the reason that function launched. If that’ll be sufficient to spice up adoption stays to be seen.
Have you ever been utilizing customized GPTs? Bought any concepts for a cool one? Tell us within the feedback.
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