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OpenAI began selling a $200 ModRetro Chromatic: Codex Edition on Nov. 9, pairing a retro handheld with a programmable cartridge for games made using Codex. On Nov. 10, Supply Co. listed the device as “Restock soon” and gave Nov. 19 as the expected restock date; sales totals and inventory remain unknown.
OpenAI began selling a $200 ModRetro Chromatic: Codex Edition on Nov. 9, pairing a retro handheld with a programmable game cartridge that buyers can load with games built through its Codex coding agent. The release puts a physical gaming device behind OpenAI’s pitch for generating and refining software with AI; by Nov. 10, the Supply Co. page said “Restock soon” and listed Nov. 19 as the expected restock date.
The edition is sold through OpenAI Supply Co. and comes in a transparent shell with one programmable Codex Cartridge and three AA batteries. The listed hardware includes a 2.56-inch, 160-by-144-pixel display, PBT buttons and support for Game Boy and Game Boy Color cartridges, as well as Chromatic cartridges. The handheld weighs 6.2 ounces, according to the product listing.
OpenAI describes a workflow in which a user prompts Codex to create a game, then uses the ModRetro Chromatic plugin and GB Studio to refine its art, scenes and game logic. A resulting ROM, or game file, can be tested in a browser emulator, streamed from a computer to the handheld, or written to the Codex Cartridge. ModRetro’s setup guide calls for a firmware update, an activation code to enable Developer-Mode, the Codex app and the plugin.
The cartridge carries a data-loss warning: OpenAI says writing a new ROM erases the game already on it and can erase its saves. The installer does not back up cartridge contents. The product page also says the edition ships to the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union. It lists a $35 carrying case and $50 extra cartridge as separate purchases.
Why OpenAI’s $200 Handheld Puts Prompts on Cartridges
OpenAI pairs its Codex coding agent with a retro handheld and programmable cartridge, turning a generated game into something people can play on dedicated hardware.
From prompt to playable game
The cartridge is the physical endpoint of a workflow that still depends on software tools and a computer.
Prompt Codex to make a game, then refine its art, scenes and logic with the ModRetro Chromatic plugin and GB Studio.
Export a ROM and test it in a browser emulator or stream it from a computer to the handheld.
Write the ROM to the Codex Cartridge to play it on the Chromatic.
What buyers get
The bundle combines classic handheld hardware with a cartridge designed for user-made games.
Handheld and cartridge
The transparent Chromatic comes with one programmable Codex Cartridge and three AA batteries.
Retro-compatible display
It has a 2.56-inch, 160-by-144-pixel display, PBT buttons and support for Game Boy, Game Boy Color and Chromatic cartridges.
Developer-Mode code
The activation code is exclusive to the Codex Edition and limited to two devices.
The offer, with open questions
The bundle adds a programmable cartridge, but the listing leaves important comparisons and demand details unresolved.
- The Codex Edition costs $200 and includes a programmable cartridge.
- A transparent Chromatic bundled with Tetris was listed at $149.99 by ModRetro.
- A carrying case and extra cartridge are separate purchases.
- OpenAI has not disclosed how many units were made or sold.
- The listing does not explain the price difference or mention Tetris in the Codex Edition box.
- Compatibility with other Chromatic units is not established.
Check before you buy
Availability and setup details matter as much as the hardware for buyers planning to make their own games.
- Check Supply Co. for the expected Nov. 19 restock; the date may change.
- Confirm the listed shipping region: the United States, Canada, Australia, New Zealand, Japan, the United Kingdom or the European Union.
- Save any cartridge game you want to keep: writing a new ROM erases the existing game and can erase its saves.
- Allow for setup steps including a firmware update, activation code, Codex app and plugin.
A Physical Test for Codex
The launch gives Codex a concrete use beyond writing code on a screen: users can turn a prompt into a game, modify it and play the result on dedicated hardware. The cartridge makes the final step tangible, while the workflow also requires tools including GB Studio and a computer for creation and testing. The product is therefore both a game device and a demonstration of how OpenAI wants people to use its coding agent.
For buyers, the $200 price is part of that proposition. On Nov. 10, ModRetro’s store listed a transparent Chromatic bundled with Tetris for $149.99, while other Chromatic and Tetris bundles started at $199.99. Supply Co.’s listing includes a programmable cartridge but does not mention Tetris. The comparison does not establish how the devices or bundles differ beyond those listed details.
OpenAI’s listing says the cartridge’s Developer-Mode activation code is limited to two devices and exclusive to the Codex Edition. That makes the included cartridge a key part of the offer, rather than simply a conventional game bundled with the handheld.
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From DevDay to Supply Co.
The Codex Edition follows an earlier version introduced as a DevDay exclusive. OpenAI’s product page describes the current model as returning with a new look and says the original was a standout favorite. GIGAZINE reported that the DevDay version was given to attendees at OpenAI’s developer conference on Sept. 29, 2026, the day ModRetro announced the collaboration on X.
OpenAI’s developer blog demonstrates the creation process with a sample game about a beaver cutting trees to build a lodge. The company says Codex can help generate sprite sheets, edit collision maps and run the game in a built-in emulator. OpenAI has also published 13 Codex-made games for the Chromatic, available to play in a browser or download as ROMs, according to the supplied source material.
ModRetro describes the Chromatic as an FPGA-based handheld for classic Game Boy cartridges and says its hardware plays original cartridges “with 100% accuracy.” That performance statement is ModRetro’s claim. The current Codex Edition is sold through Supply Co., which OpenAI says began as a small line of employee merchandise.
““with 100% accuracy””
— ModRetro
Inventory and Restock Details
OpenAI has not stated how many Codex Edition units were made or sold. The Nov. 19 date is an expected restock, and OpenAI says dates may change. The available source material does not establish whether that restock will happen as listed or how many units will be offered.
The listing gives the hardware specifications and included items, but it does not explain why the Codex Edition costs $200 compared with ModRetro’s $149.99 transparent Chromatic and Tetris bundle. The listing also does not mention Tetris in the Codex Edition box. The supplied material does not establish whether buyers can use the Codex Cartridge with other Chromatic units or whether the two-device activation limit can be changed.
The Nov. 19 Restock
The next stated milestone is the expected Nov. 19 restock on Supply Co. Buyers will need to check the product page for availability, since the date may change. The listed shipping regions, separate accessory prices and non-defective-item return policy will also shape the purchase: the source says warranty and support are handled by ModRetro, not OpenAI.
Further details that would clarify demand include the number of units in the initial sale and restock, neither of which has been disclosed in the supplied material. OpenAI’s published games and setup instructions provide examples of what the workflow can produce, but the release does not report how many buyers have created or loaded their own games.
Key Questions
What is the OpenAI Codex Edition handheld?
It is a $200 ModRetro Chromatic retro handheld sold by OpenAI Supply Co. It comes with a programmable Codex Cartridge and three AA batteries.
How do users put a Codex-made game on the cartridge?
OpenAI’s workflow uses Codex and the ModRetro Chromatic plugin to create and refine a game, with GB Studio among the tools. Users export the game as a ROM and can write it to the cartridge. OpenAI warns that writing a new ROM erases the previous game and can erase its saves.
When is the next restock expected?
As of Nov. 10, 2026, Supply Co. listed Nov. 19 as the expected restock date. OpenAI says restock dates may change.
Where does the Codex Edition ship?
The listing names the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union.
Source: Thorsten Meyer AI
