Gemini 4 Carbon API Release Date: Announced by Google, but No Date for Developers
As of 2026-11-05, Google announced Gemini 4 Carbon on 2026-10-28, but there is no date for the developer API: Google only says it will open to developers, businesses and consumers “as soon as possible” after refining safety guardrails, and the Gemini 4 section of the Gemini API models page lists only gemini-4-argon.
Updated 2026-11-05
Claude, GPT and Chinese models on one key, billed per token; check /models for callable models.
- Billed per token — live rates on /models
- Pay by card (Visa / Mastercard), Apple Pay, Google Pay or crypto
- Self-service: top up and activate instantly
Four key points
Carbon announcement date
Google’s official blog post announced Gemini 4 Carbon that day, calling it its strongest model, with state-of-the-art cybersecurity and long-horizon capabilities (Google’s claim).
Developer API
The post says Carbon will reach developers, businesses and consumers “as soon as possible” once guardrails are refined, without giving a date.
The only Gemini 4 ID on the Gemini API models page
On the Gemini API models page fetched on 2026-11-05, the Gemini 4 section lists only gemini-4-argon, not Carbon; the newest changelog entry, 2026-11-04, does not mention Carbon either.
Google’s stated Carbon introductory price (per 1M input / output tokens)
Google says Carbon will launch at the same introductory price as Argon; no Carbon launch date has been published.
Where the Gemini 4 Carbon API stands
As of 2026-11-05, Google announced Gemini 4 Carbon in an official post dated 2026-10-28 but gave no date for a developer API: the post says that starting that week Carbon goes to a subset of cyber defenders, with more trusted partners phased in through the Fairwind Program, that Google is taking part in the U.S. government’s voluntary process for pre-release model testing, and that developers, businesses and consumers will get it “as soon as possible” once guardrails are refined. Developers who want Gemini 4 today can call Gemini 4 Argon (gemini-4-argon) in the Gemini API.
What Google’s October recap says
On 2026-11-02, Google’s October AI recap said Carbon is now in pre-release testing with the U.S. government and a subset of trusted cyber defenders through the Fairwind Program, while Google refines safety guardrails and expands partner testing ahead of a broader launch to developers, businesses and consumers. The recap gives no date.
Official timeline
Gemini 4 Argon (gemini-4-argon) became generally available (GA) in the Gemini API, open to developers and enterprises.
Google announced Gemini 4 Carbon, available from that week to a subset of cyber defenders, with more trusted partners phased in through the Fairwind Program.
Google’s October recap: Carbon is still in pre-release testing, and the broader launch to developers, businesses and consumers has no date.
Officially confirmed vs not published
Officially confirmed
All of this comes from Google pages fetched on 2026-11-05: (1) the official post of 2026-10-28 announced Gemini 4 Carbon; (2) it is currently offered to a subset of cyber defenders, Google is taking part in the U.S. government’s voluntary process for pre-release model testing, and more trusted partners are phased in through the Fairwind Program; (3) opening to developers, businesses and consumers is described as “as soon as possible”, with no date; (4) Carbon will launch at the same introductory price as Argon, $2 per million input tokens and $10 per million output tokens, and a footnote gives $4 / $20 after the introductory period, with no end date on the Carbon page; (5) the Gemini API models page, pricing page and changelog do not list Carbon yet.
⚠️ What Google has not published
(1) The developer API opening date: there are various guesses in the community, and Google has confirmed no specific date. (2) Carbon’s model ID, context length and limits in the Gemini API: Google has not published them yet. (3) When Carbon’s introductory price ends: Argon’s official page says 2026-11-30, the Carbon page gives no date.
Argon vs Carbon: one open to developers, one only announced
Gemini 4 Argon (open)
Generally available in the Gemini API since 2026-10-13 as gemini-4-argon; the models page calls it a flagship reasoning model; its introductory price runs until 2026-11-30.
Gemini 4 Carbon (announced, not open to developers)
Announced on 2026-10-28; Google calls it its strongest model for cybersecurity defense and long-horizon engineering; no developer opening date has been published.
What to do now
(1) To find out whether Carbon is callable, watch three places: the Gemini API models page, pricing page and changelog; wait until Google lists a Carbon model ID there before integrating it. (2) To use Gemini 4 today, use gemini-4-argon as the official catalog lists it, and do not put a guessed Carbon ID into your config. (3) Leave room to switch later: keep the model name in a config file or environment variable rather than hard-coding it, so you change it in one place once Carbon opens.
On QCode
For similar coding and agent work, you can use the Claude or GPT models on sale on QCode’s /models, such as claude-opus-5-5 and gpt-6.1-sol, billed per token with unit prices on /models. Getting started in three steps: (1) create an account; (2) top up (Alipay, WeChat Pay, cards, crypto); (3) for Claude models in Claude Code, set ANTHROPIC_BASE_URL to https://api.qcode.cc/api. Not ready for a monthly plan? Pay-as-you-go Packs start at $4 for a one-time quota you use within 7 days; if you already have a Personal Plan, add a booster pack when you need more quota.
Frequently asked questions
Is Gemini 4 Carbon out?
It is announced but not open to developers. As of 2026-11-05, Google announced Gemini 4 Carbon on 2026-10-28 and it is still in pre-release testing; the Gemini API models page and changelog do not list it yet.
When will Gemini 4 Carbon be available to developers?
Google has given no date. The post only says Carbon will reach developers, businesses and consumers “as soon as possible” after guardrails are refined, and the 2026-11-02 October recap gives no date either.
How is Gemini 4 Carbon different from Argon?
Google positions them differently: Argon is the flagship reasoning model that became generally available to developers on 2026-10-13; Carbon is the next frontier model announced on 2026-10-28, which Google calls its strongest for cybersecurity defense and long-horizon engineering, and it is not yet open to developers.
How much will the Gemini 4 Carbon API cost?
Google has only stated an introductory price: Carbon will launch at the same price as Argon, $2 per million input tokens and $10 per million output tokens; after the introductory period it is $4 / $20, and the Carbon page gives no end date (Argon’s is 2026-11-30). No launch date has been published, so follow Google’s official pricing page.
Can I use Gemini 4 Carbon through QCode?
No. QCode does not currently offer the Gemini series (as of 2026-11-05), so neither Carbon nor Argon is on /models; for similar work, use the Claude or GPT models on sale on /models.
How do I get Gemini 4 Carbon developer access?
Google has not published an application route for general developers. Its post says Carbon goes first to a subset of cyber defenders, with more trusted partners phased in through the Fairwind Program; the Fairwind Program page says it is exclusively available to approved trusted partners and that you request access through your Google Cloud account team. Follow Google’s official announcements for the opening time and entry point.
Sources
Google’s official post “Introducing Gemini 4 Carbon” (page dated 2026-10-28), Google’s October AI recap (page dated 2026-11-02), the Gemini 4 Argon launch post, the Google DeepMind Fairwind Program page, and the Gemini API docs models page, pricing page and changelog were all fetched and archived on 2026-11-05; the QCode side comes from qcode.cc /models, the pay-as-you-go page and the docs.qcode.cc access page (2026-11-05).
Use the Claude and GPT models on sale today
One QCode key calls the Claude and GPT models on sale on /models, billed per token with unit prices on /models.
Related reading
Pay-as-you-go Packs
Buy a one-time quota instead of a monthly plan and use it within 7 days; per-model rates are on /models.
Gemini 4 Pro Status Tracker
The official docs have no model called Gemini 4 Pro; the live Gemini 4 model is Argon.
Gemini 4 Argon: specs and price
Argon’s specs, context window and official pricing.
Crypto payment guide
Nine coins, 56 networks, zero platform fee for AI coding API credits.
Checked on 2026-11-05 against the Google blog posts and Gemini API docs (models page, pricing page, changelog) fetched that day. All prices are Google’s official prices and follow its official pages; QCode’s available models and unit prices follow /models. This page will be updated once Google opens Carbon.