OpenAI is engaged on yet one more AI mannequin, reportedly referred to as GPT-4.1, a successor to GPT-4o.
The Verge lately reported that OpenAI plans to launch GPT-4.1, which is an improve to the prevailing GPT-4o. And now, now we have extra causes to consider the mannequin is certainly coming.
As noticed by AI researcher Tibor Blaho, OpenAI is already testing mannequin artwork for o3, o4-mini, and GPT-4.1 (together with nano and mini variants) on the OpenAI API platform.

This confirms that GPT-4.1 does exist, but it surely does not look like a successor to GPT-4.5.
My understanding is that GPT-4.1 is a successor to GPT-4o, which is multimodal. However, GPT-4.5 focuses extra on creativity and delivering higher solutions.
In a “Pre-Coaching GPT-4.5” video from OpenAI, founder and CEO Sam Altman dropped hints that OpenAI has a workforce that desires to redo GPT-4 from scratch utilizing new coaching knowledge and techniques.
“For those who guys might go choose whoever you needed, what’s the smallest workforce from OpenAI that might go retrain GPT-4 from scratch in the present day with every thing we all know and have and all of the techniques work?” Sam stated.
It is unclear if Altman is referring to the brand new GPT-4.1 mannequin, but when I have been to guess, I would guess on GPT-4.1.
Additionally, GPT-5 is not occurring anytime quickly, as OpenAI plans to concentrate on o3, o4-mini, o4-mini-high, and GPT-4.1 (together with nano and mini variants).