Gemini 4 Hydrogen (Flash) briefly spotted in Antigravity and the Gemini app
TestingCatalog, a leaker that finds unreleased app features, says Gemini 4 Hydrogen is rolling out in the Gemini app, listed as "Everyday help". It had shown up in Google's Antigravity coding tool earlier the same day. Andrew Curran posted that Hydrogen was live for him in the app under its code name. He then said it "very suddenly vanished" after he posted, so the rollout may be patchy or paused. Curran and Gemini leaker David (@DavidSZD1) had earlier tipped Hydrogen as Gemini 4 Flash, due on Nov 12. Google hasn't announced it, so price and benchmarks are still unknown.
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- Andrew Curran says Hydrogen showed up for him in the Gemini app under its code name, then vanished soon after he posted about it.
- TestingCatalog now says Hydrogen is going out to all users in the Gemini app too, shown as "Everyday help" in the model picker, and expects Google to announce it soon.
- TestingCatalog says Gemini 4 Hydrogen (Flash) is now rolling out in Google's Antigravity after an app update, listed as gemini-4-hydrogen-high, and LuminaBench says it is on Pro subscriptions too.
- Gemini leaker @DavidSZD1 says Hydrogen launches today, and claims Google is shipping a weaker checkpoint than the best one it tested. He posted a comparison he says shows this.
- Andrew Curran also says the launch of Gemini 4 Flash ("Hydrogen") looks imminent, and claims Gemini 4 Carbon already works in Search AI Mode for people without Ultra.
- TestingCatalog's Nov 11 post had already tipped Hydrogen for the second day of Gemini news and calls it the Flash model.
- This is the source of the one-word "Gemini" teaser from Google's Logan Kilpatrick that the Hydrogen rumour already mentions. It adds no new details.