Post says a new Gemini checkpoint is in arena
A post on X on Nov. 14 (3:37:36 p.m. Nov. 14 Japan time) said a checkpoint, or in-development version, of a new Google Gemini model had appeared in "arena." It came from @Haleeeemahh, an account that describes itself in its profile as "AI leaks & news." The poster said the model could be "Gemini 4 Krypton" and wrote that its codename is "Gemini 4 Hydrogen." The post stopped short of saying it is Krypton and gave no details of the evidence, such as where or how it was checked. Google has not announced or confirmed it.
a new GEMINI MODEL CHECKPOINT is now live in arena it could be gemini 4 krypton. Under the codename gemini 4 hydrogen update coming soon
The post ends with "update coming soon," but no follow-up post by the poster has been found in the same conversation.
"Hydrogen" is the name of an already released model
"Gemini 4 Hydrogen," which the post gave as the codename, is the same as the name of a model Google officially released on Nov. 12 (Nov. 13 Japan time). Google released it as a model for handling everyday tasks and coding quickly and efficiently, following the higher-end "Gemini 4 Carbon" and "Gemini 4 Argon."
How the codename in the post relates to the official name of the released model is not explained in the post or in official materials, and remains unknown.
The Krypton name also appeared in a separate leak
On Nov. 9, a different account posted that "Gemini 4 Krypton" was showing up on "Design Arena," a site that compares the design output of AI models (earlier article). The latest post says only "arena" and does not indicate whether it appeared on the same site.
