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TL;DR
OpenAI began selling the $200 ModRetro Chromatic: Codex Edition on November 9, pairing a retro handheld with a cartridge users can program with games built through Codex. The product page showed “Restock soon” on November 10 and listed November 19 as the expected restock date; sales numbers and the date’s reliability are unknown.
OpenAI began selling the $200 ModRetro Chromatic: Codex Edition on November 9, pairing a retro handheld with a programmable cartridge intended for games created using its Codex coding agent. By November 10, OpenAI’s Supply Co. product page said “Restock soon” and listed November 19 as an expected restock date, though the company says dates may change.
The package includes a transparent-shell ModRetro Chromatic, one programmable Codex Cartridge and three AA batteries. The device has a 2.56-inch, 160-by-144-pixel backlit IPS display, weighs 6.2 ounces and plays Game Boy, Game Boy Color and Chromatic cartridges. OpenAI sells it through Supply Co.; ModRetro provides warranty and support, according to the product information.
OpenAI describes a workflow that starts with a plain-English game idea. Codex, using a ModRetro Chromatic plugin, helps create and revise a game in GB Studio, a visual editor for Game Boy games. Users can test the resulting ROM in a browser emulator, stream it from a computer to the handheld, or write it to the cartridge and play on the device.
Getting started requires updating the handheld’s firmware, entering an activation code to enable Developer-Mode, installing the Codex app and adding the plugin. OpenAI’s developer guide warns that writing a new ROM erases the cartridge’s existing game and may erase saves; the installer does not create a backup. OpenAI also says it has published 13 Codex-made games as browser-playable titles or downloadable ROMs.
The ModRetro Handheld Where AI Prompts Meet Cartridges
OpenAI’s $200 Codex Edition pairs a retro handheld with a cartridge for games made through Codex. Its listed restock date is expected, not guaranteed.
From prompt to playable game
The workflow moves from a written idea to a ROM that can run on the handheld.
Use Codex with the ModRetro Chromatic plugin to start creating a game.
Revise the game in the visual editor and build a ROM.
Try it in a browser emulator, stream it to the handheld, or write it to the cartridge.
What buyers get
The package combines familiar retro hardware with a programmable cartridge.
A portable Chromatic
Transparent-shell handheld with a 2.56-inch backlit display; plays Game Boy, Game Boy Color and Chromatic cartridges.
Cartridge and batteries
Includes one programmable Codex Cartridge and three AA batteries.
ModRetro handles service
OpenAI sells the device through Supply Co.; ModRetro provides warranty and support.
Check before you buy
Availability and purchase terms matter as much as the creative workflow.
- The listing showed “Restock soon” on November 10.
- November 19 was listed as the expected restock date, but timing may change.
- Sales and production totals have not been disclosed.
- Shipping is listed for the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union.
- Non-defective items cannot be returned.
- Compare included games and cartridge features before judging prices against other bundles.
From AI Prompt to Physical Game
The product puts a tangible endpoint on a coding-agent pitch: a user can move from a written game idea to a ROM that runs on a dedicated handheld, rather than stopping at generated code on a computer. For people curious about AI-assisted software creation, the cartridge makes the result something they can play away from a computer and share in a familiar physical format.
It is also a commercial route into Codex. The hardware itself is a ModRetro product, but the advertised creation process relies on installing OpenAI’s app and plugin. That makes the device both a retro gaming product and a hands-on demonstration of Codex. The available information does not show how many buyers will use it to make games or how often they will return to Codex after setup.
The price is not directly comparable to every Chromatic bundle. On November 10, ModRetro listed a transparent handheld with Tetris for $149.99, while other Chromatic-and-Tetris bundles started at $199.99. OpenAI’s listing includes a programmable cartridge but does not mention Tetris. The Codex Edition therefore packages a different use case, and buyers should compare the included games and cartridge features before treating the prices as like-for-like.
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A DevDay Giveaway Goes on Sale
OpenAI says the Codex Edition was first introduced as a DevDay exclusive and describes the retail version as being “back with a new look.” A report by GIGAZINE said the earlier edition was given to attendees at OpenAI’s developer conference on September 29, 2026, the day ModRetro announced the collaboration on X. OpenAI’s developer forum introduced the later sale with the phrase “By popular demand.”
Supply Co. began as an employee merchandise shop, according to OpenAI. The company has described its next phase as a place for “collaborations, experiments, and physical expressions of research energy.” That framing is the company’s own description of the store, not evidence of how the project will perform commercially.
The Codex Cartridge is not the only way to use a game built in the workflow: OpenAI says games can also be tested in a browser or streamed from a computer. A Codex Edition carrying case is listed separately for $35, and an extra cartridge for $50. The extra cartridge includes an activation code for Chromatic Developer-Mode, which OpenAI says is limited to two devices and exclusive to this edition.
Restock Numbers Remain Unknown
OpenAI has not disclosed how many units were made or sold, and the “By popular demand” wording is not accompanied by order figures. The November 19 restock date is listed as expected, not guaranteed; OpenAI’s product information says restock dates can change.
The available product details also do not establish how Codex access is priced or whether particular features require a paid plan. The source material does not specify how much technical work Codex completes without user changes, or whether games made through the workflow will run identically across cartridges and devices. Those questions should not be treated as settled by the product announcement.
OpenAI says the store ships to the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union. Buyers outside those areas are not listed as eligible. The listing says non-defective items cannot be returned, while warranty and support are handled by ModRetro.
Watch the November Restock
The next stated milestone is the expected November 19, 2026, restock. OpenAI says that timing may change, so the Supply Co. listing is the source to check for updated availability. The company has not announced a unit count or a broader release schedule.
For buyers, the immediate practical steps are to check regional shipping eligibility and review the return terms, then follow ModRetro’s setup instructions before writing a game to the cartridge. The warning about erased games and saves makes backing up anything stored on a reusable cartridge a relevant precaution; OpenAI’s installer itself does not do that work.
Further evidence of the product’s reach would include restock availability, published sales figures or details on how customers use the Codex workflow. None had been provided in the supplied material as of November 10.
Key Questions
What is the ModRetro Chromatic: Codex Edition?
It is a $200 ModRetro Chromatic handheld sold by OpenAI’s Supply Co. shop with one programmable Codex Cartridge. It plays compatible Game Boy, Game Boy Color and Chromatic cartridges.
How do users make a game for the cartridge?
OpenAI says users install Codex and the ModRetro Chromatic plugin, describe a game, then refine it in GB Studio and build a ROM. The game can be tested in an emulator or streamed to the handheld before being written to the cartridge.
When will the handheld be available again?
The product page showed “Restock soon” on November 10 and listed November 19, 2026 as the expected restock date. OpenAI says dates may change.
Can writing a game erase saved data?
Yes. OpenAI’s guide warns that writing a new ROM erases the game already on the cartridge and can erase its saves. The installer does not back up the cartridge.
Where does OpenAI ship the Codex Edition?
The listing names the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the European Union. It also says non-defective items cannot be returned; ModRetro handles warranty and support.
Source: ThorstenMeyerAI.com
