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TL;DR
OpenAI began selling the ModRetro Chromatic: Codex Edition on November 9, 2026, for $200, with one programmable cartridge. The product is designed to let users create a Game Boy-style game with Codex, refine it in GB Studio and write it to physical hardware. As of November 10, the listing said “Restock soon,” with November 19 expected; sales and production figures have not been disclosed.
OpenAI began selling the ModRetro Chromatic: Codex Edition on November 9, a $200 retro handheld bundled with a programmable cartridge that users can load with games made through its Codex coding agent. The release connects AI-assisted software creation to a physical game device; on November 10, OpenAI’s Supply Co. listing showed “Restock soon” and gave November 19 as the expected restock date.
The Codex Edition is a transparent-shell ModRetro Chromatic sold through OpenAI’s Supply Co. It has a 2.56-inch, 160-by-144-pixel backlit display, runs on three AA batteries and plays Game Boy, Game Boy Color and Chromatic cartridges. The box includes one programmable Codex Cartridge. Supply Co. lists the price at $200 and says the handheld ships to the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union.
OpenAI describes a process that starts with a plain-language game idea. Users add the ModRetro Chromatic plugin in Codex, work on the game in GB Studio, export a ROM file and write it to the cartridge. The company also describes testing options: running the game in a browser emulator, streaming it from a computer to the handheld, or loading it onto the cartridge for play without a computer. OpenAI’s developer blog demonstrates Codex helping with tasks such as generating sprite sheets and editing collision maps.
Getting started requires updating the handheld’s firmware and entering an activation code to enable Developer-Mode, according to ModRetro’s quickstart guide. Codex and the plugin must also be installed. OpenAI says the plugin includes “Wrecklight,” an example game users can remix. Its instructions warn that writing a new ROM erases the cartridge’s existing game and may erase saved data; the installer does not back up the cartridge.
OpenAI’s ModRetro Chromatic Turns Ideas Into Cartridges
The $200 handheld pairs Codex-assisted game creation with a programmable cartridge. Its launch connects an AI coding workflow to games played on physical hardware.
From idea to handheld
OpenAI’s described process moves a game concept through creation, editing and cartridge play.
Use the ModRetro Chromatic plugin to develop a game idea, with Codex helping on tasks such as sprite sheets and collision maps.
Work on the game in GB Studio and export it as a ROM file.
Test in a browser emulator or stream from a computer, then write the ROM to the cartridge for play without a computer.
What the package offers
The Codex Edition combines classic-cartridge play with tools for loading user-created games.
Handheld and cartridge
The transparent-shell Chromatic includes one programmable Codex Cartridge and three AA batteries.
Retro-sized screen
A backlit 2.56-inch display has 160-by-144-pixel resolution.
Classic cartridges
The handheld plays Game Boy, Game Boy Color and Chromatic cartridges.
Case and cartridge
Supply Co. lists a $35 carrying case and a $50 additional Codex Cartridge.
Codex Edition vs. other listed bundles
The prices come with different stated bundles, so price alone does not establish which is better value.
| Listing | Price | Stated bundle |
|---|---|---|
| Codex Edition | $200 | Programmable Codex Cartridge |
| Transparent Chromatic | $149.99 | Tetris |
| Other Chromatic-and-Tetris bundles | From $199.99 | Tetris |
Setup and buyer cautions
Creating and loading a game requires setup beyond simply turning on the handheld.
- Update the handheld firmware and enter the activation code to enable Developer-Mode.
- Install Codex and add the ModRetro Chromatic plugin.
- Writing a new ROM erases the cartridge’s existing game and may erase saved data; the installer does not back up the cartridge.
- Check Supply Co. for current availability; the November 19 restock date may change.
- Confirm shipping to your location. The listed regions include the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union.
- Non-defective items cannot be returned; ModRetro handles warranty and support.
From AI Prompts to Playable Cartridges
The product gives OpenAI a tangible way to demonstrate Codex’s game-development workflow: a user can move from an idea to a ROM and then play it on dedicated hardware. That makes the handheld more than a conventional game console in the way the company is presenting it. Its advertised appeal depends on pairing the device with Codex, the plugin and GB Studio.
For buyers, the key distinction is between creating a game and simply playing one. The Chromatic supports existing Game Boy and Game Boy Color cartridges, but the bundled Codex Cartridge and Developer-Mode activation are aimed at making user-created games playable on the device. The release may also help readers understand how OpenAI is extending its brand into physical products: the company’s stated Supply Co. plans include collaborations and experiments, not just employee merchandise. The source material does not establish whether this is a broader commercial strategy or a limited release.
The price merits comparison. On November 10, ModRetro listed a transparent Chromatic bundled with Tetris for $149.99, while other Chromatic-and-Tetris bundles began at $199.99. Supply Co.’s $200 Codex Edition includes a programmable cartridge, and its listing does not mention Tetris. The products have different stated bundles, so the prices do not alone establish which offers better value.
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A DevDay Handheld Returns
OpenAI’s Supply Co. listing says the Codex Edition was first introduced as a DevDay exclusive and calls it a “standout favorite.” The source material says ModRetro announced the collaboration on X on September 29, 2026, the day of OpenAI’s developer conference. It reports that a DevDay version was distributed to attendees; the version now for sale is described by OpenAI as “back with a new look.”
The collaboration fits Supply Co.’s evolution from an employee merchandise shop. OpenAI says the shop began as “a small line of merch for employees” and describes its next phase as collaborations, experiments and physical expressions of its research interests. Separately, OpenAI says it has published 13 Codex-made Chromatic games, available to play in a browser or download as ROMs. The product page highlights a tile-matching puzzle, a dungeon crawler and a rhythm game featuring the Codex mascot.
ModRetro describes the Chromatic as an FPGA-based handheld for classic cartridges and says its hardware plays original cartridges “with 100% accuracy.” That is the company’s product claim, not an independently verified finding in the material available for this report. Supply Co. also says warranty and support are handled by ModRetro, and its terms exclude returns for items that are not defective.
“with 100% accuracy”
— ModRetro
Restock, Sales and Support Details
Sales totals and production numbers have not been disclosed in the source material. The “Restock soon” message and November 19 date were shown on November 10, but OpenAI says restock dates may change. It is not clear how many units were in the initial release or whether the listing’s status reflected sales, a limited allocation or another supply constraint.
The workflow’s practical limits are also not detailed here: the source does not establish how well Codex-generated games perform across projects, what technical skill users may need to finish a game, or whether the process will change. Buyers should also note the stated terms: non-defective items cannot be returned, while warranty and support are provided by ModRetro rather than OpenAI. The source does not give further detail about warranty coverage.
Expected Restock and Buyer Steps
The next listed milestone is the expected November 19 restock, though OpenAI warns the date could change. Prospective buyers will need to check Supply Co. for current availability and confirm that shipping is offered to their location. The store lists a $35 Codex Edition carrying case and a $50 extra Codex Cartridge as separate purchases.
After buying the handheld, users will need to follow ModRetro’s setup steps: update firmware, enter the activation code, install Codex and add the Chromatic plugin. Before writing a game to a cartridge, they should account for the warning that the process can erase the existing game and saves. OpenAI has not supplied sales figures or a confirmed schedule beyond the expected restock date stated on the product page as of November 10.
Key Questions
What is the ModRetro Chromatic: Codex Edition?
It is a $200 ModRetro Chromatic handheld sold through OpenAI Supply Co. The transparent-shell device comes with one programmable Codex Cartridge and plays Game Boy, Game Boy Color and Chromatic cartridges.
How does Codex put a game on the cartridge?
OpenAI’s described workflow uses the ModRetro Chromatic plugin in Codex to help create a game, then GB Studio to refine it and export a ROM. The ROM can be written to the Codex Cartridge for play on the handheld.
When will the handheld be available again?
On November 10, 2026, Supply Co. showed “Restock soon” and listed November 19 as the expected date. OpenAI says restock dates may change, and the number of units available has not been disclosed.
What does the $200 package include?
The listed package includes the handheld, one programmable Codex Cartridge and three AA batteries. A carrying case costs $35 and an additional cartridge costs $50, according to Supply Co.
Can writing a game erase existing data?
Yes. OpenAI’s instructions warn that writing a new ROM erases the game on the cartridge and can erase its saves. The installer does not back up the cartridge.
Source: ThorstenMeyerAI.com
