The ModRetro Chromatic: Codex Edition is a Game Boy Color-style handheld sold by OpenAI Supply Co. for $200. It went on sale on November 9, 2026 and sold out, with OpenAI now listing "Expected restock: November 19." On eBay, sales on November 9 and 10 closed between $279 and $399. The earlier DevDay giveaway version sold for $700 to $999 in late October and early November. The restock date is the big risk for anyone planning to flip.
How much is the ModRetro Chromatic: Codex Edition? Price and where to buy
From OpenAI's Supply Co. page:
- Price: $200.00. It includes one programmable Codex Cartridge.
- Where: OpenAI Supply Co. only, at openai.com/supply. Our team's alert listed a limit of 10 per order.
- Ships to: the US, Canada, Australia, New Zealand, Japan, the UK and the EU.
- Status: sold out (checked November 10), with a restock expected November 19.
- Accessories: a Chromatic Case: Codex Edition and an extra Codex Cartridge are sold separately by Supply Co.
What is the Codex Edition?
OpenAI says you can build your own games with Codex and the ModRetro Chromatic plugin, write the ROM to the included Codex Cartridge and play it on the handheld. Games are made in GB Studio, and you need to update the firmware and activate Developer Mode before playing from a cartridge. OpenAI says it first appeared as a DevDay exclusive and is back "with a new look." Coverage of DevDay reported roughly 2,500 attendees received the handheld.
How rare is the Codex Edition?
OpenAI hasn't published a production number for the Supply Co. version. That matters: DevDay attendees got a limited transparent version (reported at about 2,500), and some eBay listings call theirs "1 of 2,500," but the Supply Co. drop is a separate sale with an unannounced quantity and a restock already planned. Treat the DevDay unit as the rare one, and the Supply Co. unit as a limited but replenishable release.
ModRetro Chromatic Codex Edition eBay sold prices
We checked eBay on November 10, 2026.
- After the Supply Co. drop (November 9 and 10): sold at $279 (a confirmed order), $349, $395 and $399. Listings don't always say which version they are, so read these as the going rate for a new handheld with the Codex Cartridge right now.
- DevDay versions (October 21 to November 7): $699, $700, $800, $900, $950 and $999, several marked 1 of 2,500.
The math: what does it clear after fees?
Assume about 13.25% in eBay fees (check the seller fees page for your category) plus shipping.
- At $349: fees are roughly $46, leaving about $303. Against $200 plus tax, that is about $90 to $100 before shipping.
- At $279: about $242 after fees, roughly $30 to $40.
- At $399: about $346 after fees, roughly $140 to $145.
If OpenAI restocks on November 19 and more people get one at $200, presale prices will probably fall. That is a forecast, not data.
Is the ModRetro Chromatic Codex Edition worth it?
Only as a short flip, and the clock is running. It costs $200 and presales closed at $279 to $399 (checked November 10, 2026). That can clear $30 to $140 after fees, but a known restock on November 19 limits how long the premium lasts.
Flip, hold or pass? Our take
Our team posted the link when it went live and tracked the stock cycling in and out. Our read:
- Sell before the restock. The premium depends on scarcity, and OpenAI has told everyone more are coming.
- The DevDay unit is a different animal. That is where the $700 and up sales are, and you can't buy it at retail.
- Buyers want the Codex tie-in. The product is part handheld, part AI-game toy, and some of the demand is novelty.
- Risk is moderate. You pay $200 up front, and the floor after fees is a small gain or a small loss.
Our verdict: a quick flip if you already have one, pass if you'd have to chase it above retail. If you want one to keep, waiting for November 19 costs you nothing.
What to watch
- The November 19 restock, including quantity and any limit.
- eBay sold prices in the days before and after it.
- Other Supply Co. drops. OpenAI lists a case and extra cartridge too.
More reading: our lowkey flips guides and today's lowkey flips roundup.
Get the lowkey flips calls in our Discord
Limited online drops get posted with the link, limits and eBay search as they go live, and sellouts and restocks are tracked in the same channel.
Sources
- OpenAI Supply Co. — ModRetro Chromatic: Codex Edition (official: price, shipping regions, sold out, restock date)
- Generation Amiga — Chromatic gets OpenAI Codex support for creating Game Boy Color games
- Held Games — ModRetro and OpenAI Codex games guide
- eBay — sold listings for ModRetro Chromatic Codex Edition (checked November 10, 2026)
- eBay — Seller fees
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