Gemini 4 Krypton: Release Date, Leaks and API Status

Gemini 4 Krypton is absent from Google's public API catalogue as of November 9, 2026. The model catalogue lists Gemini 4 Argon (gemini-4-argon); Krypton and krypton-a have no release or API listing. A November 9 @chetaslua post labels a build "krypton-a" and reports roughly twice the time and code on the same prompt, in a comparison with Carbon and Argon.

• Confirmed: gemini-4-argon is the only Gemini 4 entry on Google's model catalogue, with general availability dated October 13, 2026 in the changelog.
• Unconfirmed: Krypton and krypton-a appear in a tester's November 9 post; the pricing page leaves Krypton unpriced.
• Today: use Gemini 4 Argon for a Gemini 4 model, or Gemini 3.8 Flash as the current Flash option.

What is Krypton and krypton-a?

Krypton is a name that appears in community posts for a claimed Google model. krypton-a is the label @chetaslua used for the build in his November 9 comparison, which he called the "krypton-a version first checkpoint". His post sets that build against Carbon and Argon. Google's checked pages use neither name.

The label remains a tester's term. The post leaves out where the build ran or who provided access, so private access is unknown. A label in a comparison can identify a test build; it does not make the name a Google product.

Has Google announced a release date?

Google's pages leave a Krypton release date unannounced. Krypton is absent from the model catalogue, changelog and pricing page.

The changelog's newest entry is dated November 6, 2026, and the pricing page has an Argon section. The public pages checked on November 9, 2026 show no Krypton release date, price, or model ID.

Does it outperform Carbon?

The concrete performance claim is @chetaslua's description of one comparison. On November 9, 2026, he posted a comparison labelled Gemini Krypton, Gemini Carbon and Gemini Argon. In his text, the build took roughly twice the time and wrote roughly twice the code on the same prompt. That is an attributed report about output volume from one tester rather than a quality ranking or a reproduced benchmark.

Output volume leaves correctness open. A longer answer can pass the same tests, fail them, or add code beyond the task. To decide whether to switch, test correctness on your own tasks, repeat the same tasks across runs, and measure total waiting time from request to a working result. Public, reproducible tests supporting a quality gain are absent from the sources checked.

Carbon's own public status is covered in Gemini 4 Carbon: release date, price and API access.

How do Hydrogen and Argon fit?

Krypton and Hydrogen are separate names in community posts. None of the checked Google pages maps either name to Pro or Flash. For Hydrogen's own status, read Gemini 4 Flash release date: Hydrogen and API status.

Argon is the confirmed Gemini 4 model in Google's catalogue. Existing Gemini 4 Argon coding tests cover Argon's behaviour; those results belong to Argon alone.

Can you use the API today?

The pages checked provide no public Krypton model ID or API listing. The catalogue leaves Krypton unlisted, and the pricing page leaves it unpriced.

For a Gemini 4 model today, call gemini-4-argon. The Gemini 4 Argon model page shows OmniaKey's current access. Gemini 3.8 Flash is the current Flash option on the checked pages.

Frequently asked questions

Is Gemini 4 Krypton released?

No official public release or API listing for Krypton appears on the three Google pages checked on November 9, 2026. Those pages list gemini-4-argon; krypton-a is the name the tester used for the build in his comparison.

Is krypton-a an official Google model name?

Google's checked pages do not use krypton-a. It is the name @chetaslua used for the build in his November 9, 2026 comparison post.

Does Krypton beat Carbon?

The public claim is about effort: roughly twice the time and code on the same prompt, in a comparison with Carbon and Argon. Public, reproducible tests supporting a quality win are absent, so compare on your own correctness checks and total waiting time.

Can I use Krypton through OmniaKey?

OmniaKey's current catalogue lists Gemini 4 Argon and no Krypton, so there is no Krypton model to select. Gemini 4 Argon is the listed Gemini 4 option, and its model page shows current access.

Sources checked

• Google Gemini API model catalogue
• Google Gemini API changelog
• Google Gemini API pricing
• @chetaslua on X, November 9, 2026