When using GPT-5.5, it is instantly noticeable how much more powerful it is.
— Peter Gostev (@petergostev) 23 avril 2026
In Codex, I gave it a very complex prompt to create London Toy Railway with landmarks and seasons – it did an excellent job in one shot.
In the second half of the video you see GPT-5.4 – it was also… pic.twitter.com/zmAgrAsYil
When using GPT-5.5, it is instantly noticeable how much more powerful it is. In Codex, I gave it a very complex prompt to create London Toy Railway with landmarks and seasons – it did an excellent job in one shot. In the second half of the video you see GPT-5.4 – it was also