Ghost (https://useghost.io/) generates presentations from instructions in a chatbot. Based on chatGPT 5 and built in HTML.

Builds and changes are done in real time.
All elements can be modified directly or via the chatbot.

Direct presentation and export pdf or png/jpg images.

In the free version, unlimited slides, use of chatGPT 5 nano and mini with monthly quotas (5 instructions with mini and 5 with nano).