ModRetro + Codex
developers.openai.com
developers.openai.com
But play-testing on a real Chromatic requires a firmware update and API key that came in the box with the DevDay devices
https://support.modretro.com/en_us/chromatic-devday-edition-...
I just tried it and prompted a GBC version of YOYOZO, my GOTY game. Wild times.
That's too bad! Those blank DIY cartridges in the DevDay bundles look really sweet. Here's to hoping that they make it more general-release!