🔍 Read the full analysis: How OpenAI’s Chromatic Codex Edition Reimagines The Handheld on ThorstenMeyerAI.com
Get business pricing on monitors, keyboards and dev gear
- Business-only prices and quantity discounts
- Tax-exempt purchasing
- Multiple users, one account, clear invoices
TL;DR
OpenAI began selling the $200 ModRetro Chromatic: Codex Edition on November 9, pairing a retro handheld with a programmable cartridge for games created through its Codex workflow. The product page showed “Restock soon” on November 10 and listed November 19 as the expected restock date; sales figures and stock levels have not been disclosed.
OpenAI began selling a $200 ModRetro Chromatic: Codex Edition on November 9, pairing a transparent retro handheld with a programmable game cartridge designed for games made using its Codex coding agent. The product page showed “Restock soon” on November 10 and listed November 19 as the expected restock, though OpenAI says dates can change and has not disclosed how many units were available or sold.
The bundle is sold through OpenAI’s Supply Co. store and includes the Chromatic handheld, one Codex Cartridge and three AA batteries. The device has a 2.56-inch, 160-by-144-pixel IPS display, transparent ABS shell and PBT buttons. It plays Game Boy and Game Boy Color cartridges as well as Chromatic cartridges, according to the product listing. It measures 5.2 by 3 by 1.2 inches and weighs 6.2 ounces.
OpenAI’s advertised workflow starts with a game idea written in plain language. Users add the ModRetro Chromatic plugin in Codex, then use the agent alongside GB Studio, a visual editor for Game Boy games, to revise game logic and art. They can build a ROM and test it in a browser emulator, stream it from a computer to the handheld, or write it to the Codex Cartridge for play on the device.
The setup requires a firmware update and an activation code to unlock Developer-Mode, followed by installation of the Codex app and plugin. OpenAI’s developer blog demonstrates tools for generating sprite sheets, editing collision maps and running a game in an emulator. The company also warns that writing a new ROM erases the cartridge’s existing game and may erase its saved data; its installer does not back up the cartridge.
A handheld built for AI-assisted game making Codex turns prompts into playable cartridges
OpenAI’s $200 ModRetro Chromatic: Codex Edition pairs a retro handheld with a programmable cartridge and a workflow for making games with Codex.
From idea to handheld game
OpenAI’s advertised process connects a written idea to a ROM that can run on physical hardware.
Start with a game idea in plain language and use Codex with the ModRetro Chromatic plugin.
Work alongside GB Studio to revise game logic and art, then build a ROM.
Test in a browser emulator, stream from a computer, or write the ROM to the Codex Cartridge.
What the bundle offers
The edition combines familiar cartridge play with a Codex-focused creation workflow.
Handheld and cartridge
The bundle includes a Chromatic handheld, one programmable Codex Cartridge and three AA batteries.
Compact retro screen
A 2.56-inch, 160-by-144-pixel IPS display sits inside a transparent ABS shell with PBT buttons.
Classic cartridges, too
The listing says it plays Game Boy and Game Boy Color cartridges as well as Chromatic cartridges.
Know before buying or loading a game
The workflow requires setup, and writing a new game can affect existing cartridge data.
- Update the handheld firmware.
- Use the activation code to unlock Developer-Mode.
- Install the Codex app and ModRetro Chromatic plugin.
- A new ROM erases the cartridge’s existing game.
- Saved data may also be erased.
- The installer does not back up the cartridge.
Availability and support
The product page showed “Restock soon” on November 10 and listed November 19 as the expected restock date.
| What buyers should know | Published information |
|---|---|
| Restock | November 19 is expected; the date may change. |
| Stock and sales | OpenAI has not disclosed unit counts or sales figures. |
| Shipping regions | United States, Canada, Australia, New Zealand, Japan, United Kingdom and European Union. |
| Returns and support | Non-defective items cannot be returned; ModRetro handles warranty and support. |
A Cartridge Built Around Codex
The product is both a handheld and a physical demonstration of OpenAI’s coding tools. The console plays established cartridge formats, but the edition’s distinctive feature is a route from a written prompt to a game that can be loaded onto physical hardware. That gives prospective users a concrete way to test a coding agent beyond a chat window or a software demo.
It also ties the experience to OpenAI’s own tools: buyers seeking to make and load games must install Codex and its ModRetro plugin. That makes the hardware a form of product promotion as well as merchandise. The source article describes the strategy as selling a habit rather than just a gadget; that is an interpretation, not a stated sales objective from OpenAI.
The $200 price is higher than the $149.99 listed November 10 for ModRetro’s transparent Chromatic bundle with a Tetris cartridge. Other Chromatic-and-Tetris bundles on ModRetro’s store started at $199.99. The Supply Co. listing includes a programmable cartridge but does not mention Tetris, so the packages differ and are not directly equivalent. Buyers can also purchase a $35 carrying case or a $50 extra Codex Cartridge separately through Supply Co.
Popular right now
Bose QuietComfort Earbuds (2nd Gen) – True Wireless Bluetooth Earbuds with Active Noise Cancellation
Dyson Airwrap i.d. Multi-Styler for Straight and Wavy Hair
DREAME A3 AWD 1000 LiDAR Robot Lawn Mower
As an affiliate, we earn on qualifying purchases.
From DevDay Giveaway to Store
OpenAI’s Supply Co. page says the Codex Edition was first introduced as a DevDay exclusive and describes the retail version as returning “with a new look.” GIGAZINE reported that the earlier edition was handed to attendees at OpenAI’s developer conference on September 29, 2026, when ModRetro announced the collaboration on X. An OpenAI developer forum post introduced the current sale with the phrase “By popular demand.”
OpenAI describes Supply Co. as having started as a small employee-merchandise line, with plans for collaborations and physical products. The Chromatic fits that approach: ModRetro provides the handheld hardware, while OpenAI’s contribution is the Codex-focused creation workflow and cartridge branding. OpenAI has also published 13 Codex-made Chromatic games for browser play or ROM download, including a tile-matching puzzle, dungeon crawler and rhythm game highlighted on the product page.
ModRetro says its FPGA-based Chromatic plays original cartridges “with 100% accuracy.” That is the manufacturer’s claim. The Codex Edition’s listing says it supports Game Boy and Game Boy Color cartridges, but the product materials do not provide independent testing of compatibility or accuracy.
“Its FPGA hardware plays original cartridges with “100% accuracy.””
— ModRetro
Stock, Compatibility and Support
OpenAI has not said how many units were offered, how many sold, or what prompted the “Restock soon” message. The November 19 date was presented as an expected restock, and OpenAI’s page says dates may change. It is not clear whether the product will remain available after that date or whether further restocks are planned.
The listing says the extra Codex Cartridge includes an activation code for Chromatic Developer-Mode, limited to two devices and exclusive to the Codex Edition. The supplied information does not explain how codes are assigned across replacement devices or what happens if a handheld is lost or replaced. It also does not establish how accessible the creation workflow is to people without coding experience, or how much debugging a generated game may need.
Sales are limited to the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union. OpenAI’s listing says non-defective items cannot be returned and that warranty and support are handled by ModRetro, not OpenAI. The terms, claims of cartridge accuracy and long-term support should be checked against the applicable product and warranty documents.
Watch the November Restock
The next listed milestone is the expected November 19 restock. OpenAI says the date can change, so buyers will need to check Supply Co. for current availability rather than treat that date as guaranteed. The company has not announced additional stock figures or a broader release schedule.
For owners, the next steps are to update the handheld firmware, use the activation code to enable Developer-Mode, install Codex and add the Chromatic plugin. Anyone loading a new ROM should first account for the warning that writing to the cartridge may erase its game and saved data. Further information about stock, support or changes to the workflow has not been announced in the supplied material.
Key Questions
What is the Chromatic: Codex Edition?
It is a $200 ModRetro Chromatic handheld sold by OpenAI through Supply Co. The package includes one programmable Codex Cartridge and three AA batteries.
How does Codex work with the handheld?
OpenAI describes a workflow in which users prompt Codex to help make a game, refine it with GB Studio, build a ROM and play it in an emulator, stream it to the handheld, or write it to the Codex Cartridge.
When will it be back in stock?
As of November 10, the product page listed November 19 as the expected restock date. OpenAI says dates may change, and it has not disclosed stock levels.
Does writing a game erase anything?
OpenAI warns that writing a new ROM erases the game already on the cartridge and may erase saved data. The installer does not back up the cartridge.
Where is it available, and who handles support?
The listed shipping regions are the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union. OpenAI’s listing says ModRetro handles warranty and support; non-defective items cannot be returned.
Source: ThorstenMeyerAI.com
