OpenAI has released a ModRetro Chromatic plugin for Codex and a matching piece of hardware: the ModRetro Chromatic: Codex Edition, a Game Boy Color-style handheld priced at $200 with one programmable game cartridge included. OpenAI Developers announced both on November 9, with the handheld on sale through Supply Co.

The workflow runs inside the ChatGPT desktop app: install the ModRetro Chromatic plugin in Codex, describe the game you want, and Codex designs levels, animates sprites and builds the ROM. You can playtest in a preview, edit the project files, then connect the handheld by USB and choose "Install on Chromatic" to flash the game to the cartridge.

The handheld has a 2.56-inch backlit IPS screen, Gorilla Glass, three AA batteries (or ModRetro's rechargeable Power Core), a speaker and a headphone jack, and goes on sale in the US, Canada, Australia, New Zealand, Japan, the UK and the EU. It is a novelty next to OpenAI's core products, but it is a real Codex plugin and a real product users can buy today.