Gemini 4 Krypton is a name, not a release. As of November 14, 2026, Google has not announced a model by that name in anything we read, and OpenRouter’s catalog lists three Gemini 4 models, Argon, Carbon and Hydrogen, with no Krypton ID.
The name took off on November 14. Between 04:51 and 08:28 UTC, several accounts said a Krypton checkpoint was being tested on Arena under the gemini-4-hydrogen label; the biggest of those posts had about 84k views by 23:44 UTC. By the afternoon the claim was coming apart: the account behind the most-shared Krypton demos wrote that what it tested was Hydrogen at a higher reasoning effort, and another leak account said Krypton was not on Arena at all.
This page is the record of that rumor. It updates when Google says something, not when the posts get louder.
On this page · 9 sectionsOpen
Gemini 4 Krypton is a rumored Google model. As of November 14, 2026, Google has not announced it, and OpenRouter’s catalog lists no Krypton model ID.
The name spread on November 14 from posts saying a Krypton checkpoint was being tested on Arena under the gemini-4-hydrogen label.
The account behind the most-shared Krypton demos took its claim back: what it tested was Gemini 4 Hydrogen at a higher reasoning effort.
Another leak account says Krypton is not on Arena at all, then posted outputs it labels Krypton without saying where they came from.
Google’s shipped Gemini 4 models are Argon, Carbon and Hydrogen, and their element order does not track price or size, so a heavier name proves nothing.
§ 01What we actually know
| Claim | Who said it | Status |
|---|---|---|
| Google has a model called Gemini 4 Krypton | Leak accounts on X, from November 13 | Unconfirmed: no Google source |
| Krypton is in internal testing, with a first checkpoint | @pankajkumar_dev | Unconfirmed: no artifact |
| Krypton runs on Arena under the gemini-4-hydrogen label | @hakmgpt, @HarshithLucky3, @abhinavflac, @adityaa_behera, @Mr_Salio | Disputed: the best-known poster took it back |
| A checkpoint ID 01a1d60a-aea7-7bba-ad31-f44877c84b7c was seen on November 13 | @abhinavflac | Cannot check: no public record of that ID |
| The Krypton demo clips came from Krypton | @Mr_Salio | Taken back by the poster |
| Krypton is not on Arena | @lyraxana | Unconfirmed: no source named |
| A release date | Nobody | No dated claim exists |
§ 02Where the name came from
The first uses we found are wishes, not leaks. Early on November 13 UTC, several replies to Google’s Logan Kilpatrick asked for a Gemini 4 Krypton. Hours later a post with about 12k views listed Krypton among dozens of element names as Google’s upcoming models, running through most of the periodic table.
The Arena claim arrived overnight into November 14, and it is the part that spread.
| Time (UTC) | Who | What they posted | Views |
|---|---|---|---|
| Nov 13, 06:11 | A reply to Logan Kilpatrick | A request for a Gemini 4 Krypton | 19 |
| Nov 13, 13:27 | @ash_twtz | Krypton in a list of dozens of element names | 12k |
| Nov 14, 04:51 | @hakmgpt | A new Gemini model on Arena under gemini-4-hydrogen; asks if it is Krypton | 8.8k |
| Nov 14, 05:42 | @pankajkumar_dev | Krypton in internal testing, first checkpoint arrived | 81k |
| Nov 14, 06:18 | @HarshithLucky3 | A Krypton checkpoint on Arena, or just higher thinking? | 8.3k |
| Nov 14, 07:36 | @abhinavflac | Krypton on Arena under gemini-4-hydrogen, with a checkpoint ID | 21k |
| Nov 14, 08:17 | @adityaa_behera | Google reportedly testing it on Arena | 84k |
| Nov 14, 08:28 | @Mr_Salio | A first Krypton output, on Arena under Gemini 4 Hydrogen | 35k |
| Nov 14, 13:41 | @lyraxana | Krypton is not being tested on Arena yet | 50k |
| Nov 14, 14:53 | @Mr_Salio | Retraction: it was Hydrogen at a higher reasoning effort | 407 |
| Nov 14, 20:00 | @lyraxana | Side-by-sides labelled Krypton, Carbon and Argon, source not given | 8.7k |
§ 03The Arena question
Every Arena claim rests on outputs from a model labelled gemini-4-hydrogen, a name Google released on November 12. A tester who sees better answers under that label sees a difference, but a released label cannot show which checkpoint produced an answer: a new model, the same model at a higher reasoning effort, and a change in settings all look the same from outside. @HarshithLucky3 asked exactly that in the first hours: “is this a new model checkpoint or just higher thinking” (post).
@Mr_Salio, whose clips carried the claim furthest, answered it at 14:53 UTC: “Sadly, it turns out this was Gemini 4 Hydrogen with higher reasoning effort, not Krypton” (post), crediting @lyraxana. That account had written at 13:41 UTC that “Gemini 4 Krypton is not being tested in LMArena yet” (post), a post with about 50k views.
The rumor did not end there. From 20:00 UTC, @lyraxana posted side-by-side outputs it labels Gemini 4 Krypton against Carbon and Argon (post, post), and wrote that “Krypton is NOT on LMArena and all my outputs are NOT from LMArena or any other arena” (post). It does not say where they come from. A label on a screenshot is a claim, not a source, so this page grades those outputs as unconfirmed too.
Our own record: our Gemini 4 page carried one of the retracted clips as an unconfirmed sighting at 18:12 UTC on November 14, about three hours after its poster took it back. We corrected that line the same evening.
§ 04What the element names tell you, and what they do not
Google names its Gemini 4 models after elements, and a common read on X is that a heavier element means a bigger model, which would put Krypton (atomic number 36) far above the rest. Google’s own lineup does not follow that order. Hydrogen (1) is the cheapest, at $1.50 and $7.50 per million input and output tokens. Carbon (6) and Argon (18) share a $2 and $10 price through November 30, 2026, and Google released Carbon, the lighter element, after Argon and described it as its next frontier model. The atomic number tells you nothing about size or price, so a Krypton name says nothing about where such a model would sit.
§ 05What would confirm it
- A Google blog post, model page or Gemini API changelog entry naming Gemini 4 Krypton.
- A gemini-4-krypton model ID in the Gemini API or in OpenRouter’s catalog.
- A codenamed Arena entry that Google later ties to Krypton.
- A Google or Google DeepMind account naming it. Our search of seven of those accounts on X for the word Krypton, over the past seven days, found nothing.
Until one of those appears, any date is a guess. Google’s last three Gemini 4 releases came on October 13, November 10 and November 12, 2026.
§ 06Where CellCog sits
CellCog runs on Anthropic’s Claude models: Claude Opus 5.5 on most tiers, and Claude Fable 5.2 on Agent Max and Creative Max since November 11, 2026. We do not route to any Gemini model today, and we have not tested anything called Krypton. If Google ships it and it beats our current lanes on our own work, the switch is announced on this blog the day it happens.
§ 07The tracker
As of November 14, 2026, 23:50 UTC: Gemini 4 Krypton is an unconfirmed name. The Arena claim is disputed by its best-known poster, Google has said nothing, and no model ID exists. This page becomes a release record the day Google names the model.
§ 08Update log
- November 14, 2026: page opened, with the November 13 to 14 chain read from the posts themselves.
§ 09Sources
- Posts on X, read through X’s API on November 14, 2026: @ash_twtz, @hakmgpt, @pankajkumar_dev, @abhinavflac, @adityaa_behera, @Mr_Salio.
- OpenRouter’s models catalog, read November 14, 2026.
- Our records of Gemini 4 Hydrogen, Gemini 4 Carbon and Gemini 4 Argon, each read from Google’s own posts.
Q1What is Gemini 4 Krypton?
A name for a Google model that leak accounts began using on November 13 and 14, 2026. Google has not used it in anything we read.
Q2Was the Krypton demo on Arena real?
The account that posted the most-shared demos, @Mr_Salio, wrote on November 14 that it turned out to be Gemini 4 Hydrogen with a higher reasoning effort. Outputs under a released label cannot show which checkpoint made them.
Q3How do the Gemini 4 element names work?
Google has shipped Argon (October 13), Carbon (November 10) and Hydrogen (November 12). Hydrogen is the cheapest, Argon and Carbon share a price, and the order does not follow atomic number.
Q4What would confirm Gemini 4 Krypton?
A Google post or docs page naming it, a gemini-4-krypton model ID in the Gemini API or on OpenRouter, or a codenamed Arena entry that Google later ties to it.
Q5Does CellCog use Gemini models?
Not today. CellCog runs on Anthropic’s Claude models (Claude Opus 5.5 on most tiers; Claude Fable 5.2 on Agent Max and Creative Max since November 11, 2026). We have not tested anything called Krypton.