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TL;DR
OpenAI began selling a $200 ModRetro Chromatic: Codex Edition on November 9, 2026, with a programmable cartridge for games made using its Codex coding agent. By November 10, the product page said “Restock soon” and listed November 19 as the expected date. Sales totals, stock levels and whether that restock date will hold have not been disclosed.
OpenAI began selling a $200 ModRetro Chromatic: Codex Edition on November 9, pairing the retro handheld with a programmable game cartridge intended for games created with its Codex coding agent. On November 10, OpenAI’s Supply Co. store page said “Restock soon” and gave November 19 as the expected restock date; the company has not disclosed how many units were available or sold.
The edition is a transparent-shell ModRetro Chromatic sold through OpenAI’s Supply Co. shop. The box includes one programmable Codex Cartridge and three AA batteries. The handheld has a 2.56-inch backlit display with a resolution of 160 by 144 pixels, and it plays Game Boy, Game Boy Color and Chromatic cartridges. It can also use ModRetro’s Rechargeable Power Core, sold separately.
OpenAI’s advertised workflow starts with a player describing a game in plain English. With the ModRetro Chromatic plugin installed in Codex, users can generate and revise a game in GB Studio, build a ROM file, test it in an emulator or stream it from a computer to the handheld, then write it to the cartridge. ModRetro’s setup guide says users must update the handheld’s firmware and enter an activation code to enable Developer-Mode.
OpenAI’s instructions warn that writing a new ROM erases the cartridge’s existing game and may erase its saved data; the installer does not make a backup. The product listing says the edition ships to the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the EU. It also says non-defective items cannot be returned, while warranty and support are handled by ModRetro.
Could Codex Reach Your Game Collection? A Retro Handheld Meets AI Game-Making
OpenAI’s $200 ModRetro Chromatic: Codex Edition pairs a retro handheld with a programmable cartridge for games made using Codex. The offer links AI-assisted coding to physical hardware, with practical limits buyers should understand.
What buyers get
The bundle adds game creation to a ModRetro handheld, rather than introducing a new console platform.
Chromatic handheld
A transparent-shell system with a 2.56-inch display that plays Game Boy, Game Boy Color and Chromatic cartridges.
Programmable cartridge
The box includes one Codex Cartridge and three AA batteries. The Supply Co. listing does not mention Tetris.
Codex game workflow
Users need the Codex app and ModRetro plugin to create and revise games in GB Studio, then build a ROM.
From prompt to cartridge
The advertised workflow connects a plain-English game idea to playable software on the handheld.
Use Codex with the ModRetro plugin to create and edit a game in GB Studio.
Build a ROM, then test it in an emulator or stream it from a computer to the Chromatic.
Update the handheld firmware, enter an activation code and write the ROM to the cartridge.
What is known—and not known
The store status gives a restock estimate, but not a picture of demand or supply.
| Question | What the listing says | What remains unclear |
|---|---|---|
| Availability | “Restock soon”; expected November 19 | Units made or sold |
| Restock | The date may change | Whether it will hold or how many units will arrive |
| Game creation | Codex, GB Studio and a cartridge workflow | Skill needed and how much editing polished games require |
Before you buy or write a game
The practical details matter as much as the AI feature.
- Confirm the current restock date on Supply Co.
- Shipping is listed for the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the EU.
- Non-defective items cannot be returned.
- Writing a new ROM erases the cartridge’s existing game.
- Saved data may also be erased.
- The installer does not make a backup; the source material does not describe a recovery method.
A Cartridge for Codex-Built Games
The bundle turns Codex from a software tool into part of a physical game-making workflow: a user can prompt for a game, edit it, and load the result onto a handheld rather than stopping at a screen preview. That makes the product relevant to people interested in AI-assisted coding and game development, as well as retro hardware collectors.
It also gives OpenAI a tangible way to promote Codex. Buyers who want to create their own cartridge games need the Codex app and the ModRetro plugin, making the handheld a route into the company’s coding tools. That is the product’s clear promotional function; the available information does not establish how many customers will use Codex or how well the workflow works for beginners.
The price is another part of the proposition. On November 10, ModRetro listed a transparent Chromatic bundled with Tetris for $149.99, while other Chromatic-and-Tetris bundles started at $199.99. The Codex Edition costs $200 and includes a programmable cartridge, but its Supply Co. listing does not mention Tetris. Those are different bundles, so the prices do not establish a direct like-for-like comparison.
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From DevDay Gift to Store
OpenAI’s Supply Co. listing says the Codex Edition was first introduced as a DevDay exclusive and calls it a “standout favorite.” A report by GIGAZINE says the earlier version was given to attendees at OpenAI’s developer conference on September 29, 2026, the date ModRetro announced the collaboration on X. OpenAI’s developer forum described the retail release as “By popular demand.”
The edition is not a new standalone console platform. The Chromatic is ModRetro’s handheld for Game Boy and Game Boy Color cartridges. ModRetro says its FPGA hardware plays original cartridges “with 100% accuracy”; that is the manufacturer’s claim. OpenAI’s contribution to this edition is the Codex-linked development path and programmable cartridge, rather than a different display or a new category of handheld hardware.
OpenAI also sells a Codex Edition carrying case for $35 and an extra Codex Cartridge for $50. According to the Supply Co. listing, the extra cartridge includes an activation code for Chromatic Developer-Mode, limited to two devices and exclusive to the Codex Edition. OpenAI’s developer materials list 13 Codex-made games available to play in a browser or download as ROMs, including a sample game about a beaver building a lodge.
““100% accuracy.””
— ModRetro, describing its FPGA hardware
Stock, Sales and Workflow Limits
OpenAI has not said how many units were made, how many sold or whether the store’s November 19 restock estimate will hold. The product page cautions that restock dates may change. A “Restock soon” notice indicates the item was not then available for immediate purchase, but it does not by itself establish that every unit sold or explain the reason for the status.
The published materials also do not quantify how much Codex can build without user editing, what technical skill is needed to produce a polished game, or whether the tools will change after launch. The cartridge warning establishes a risk of losing existing game data when writing a new ROM, but the source material does not describe a recovery method. OpenAI’s and ModRetro’s product and performance descriptions remain company statements.
Watch for the November Restock
The next stated milestone is the expected November 19 restock on Supply Co. OpenAI says the date may change, and no quantity or shipping schedule for that restock has been announced. Prospective buyers will need to check the store for current availability and confirm that their location is among the listed shipping destinations.
Further details could clarify stock levels, delivery timing and how the developer-mode setup works in practice. Until then, the confirmed offer is a $200 handheld-and-cartridge bundle, with Codex and GB Studio forming the software workflow and ModRetro responsible for warranty and support.
Key Questions
What is the Chromatic: Codex Edition?
It is a $200 ModRetro Chromatic handheld sold by OpenAI’s Supply Co. with one programmable Codex Cartridge and three AA batteries.
How does Codex connect to the handheld?
Users install the Codex app and ModRetro Chromatic plugin, create and refine a game, build a ROM, then write it to the cartridge. They can also test games in a browser emulator or stream them from a computer to the Chromatic.
When will it be back in stock?
On November 10, the store listed an expected restock date of November 19, 2026. OpenAI says restock dates may change.
Does writing a game erase cartridge data?
OpenAI’s instructions say writing a new ROM erases the game on the cartridge and can erase saved data. The installer does not back up the cartridge.
Where does the Codex Edition ship?
The listing names the United States, Canada, Australia, New Zealand, Japan, the United Kingdom and the EU. It says non-defective items cannot be returned, and ModRetro handles warranty and support.
Source: ThorstenMeyerAI.com
