TL;DR
Who can use Gemini 4 Carbon, and what does it cost?
Google opened Gemini 4 Carbon, what it calls its strongest model, to AI Ultra subscribers and paying developers on Tuesday. If you build with AI, it's a cheaper option for your hardest jobs, but the API price doubles after Nov 30. On AI Pro, AI Plus or the free plan? Nothing to do yet.
What did Google announce?
On Tuesday, November 10, 2026, Google made Gemini 4 Carbon available well beyond the small group of cybersecurity defenders who got it two weeks ago. The launch post calls it Google's "strongest model," built for long, multi-step work in coding, research and complex knowledge work. Google posted the news on X at 11:05am ET.
There are two ways in. People on the Google AI Ultra plan get it in the Gemini app, AI Mode in Search and Google Antigravity, Google's coding tool where AI agents (assistants that carry out multi-step jobs on their own) write and fix code. Developers and businesses get it through the paid tier of the Gemini API in Google AI Studio and through Gemini for business. An API is the way apps and automations call the model directly and pay per use.
Argon or Carbon?
Google is clear that Carbon isn't the everyday pick. In its own words, Gemini 4 Argon "remains the ideal choice for the majority of software engineering and knowledge work." Carbon is for the hardest jobs, like complex, multi-step coding and debugging or open-ended research, and Google says it uses more tokens than Argon to think things through and check its work. Tokens are the chunks of text AI is billed by, so more thinking means a bigger bill per job.
If you've ever paid a specialist for a job a generalist could have done, you get the idea.
What does Gemini 4 Carbon cost?
| Plan or option | Price | Who it's for | Source |
|---|---|---|---|
| Gemini API, intro price (until Nov 30, 2026) | US$2 per million input tokens, US$10 per million output tokens | Paying developers and businesses | |
| Gemini API, from Dec 1, 2026 | US$4 per million input tokens, US$20 per million output tokens | Paying developers and businesses | |
| Google AI Ultra (5x) | US$99.99/month | 5x higher usage limits than AI Pro | Google AI plans page (US) |
| Google AI Ultra (20x) | US$199.99/month | 20x higher usage limits than AI Pro | Google AI plans page (US) |
| For comparison: Claude Fable 5.2 API | US$8 per million input tokens, US$40 per million output tokens | Developers on the Claude API | Anthropic |
Input tokens are what you send the model. Output tokens are what it writes back, which is why they cost more.
Who can't use it yet?
- AI Pro, AI Plus and free users. Google's plans page lists Carbon only under AI Ultra. The Verge says it isn't clear when, or if, lower tiers will get it.
- Free API users. Developers need the paid tier of the Gemini API. AI Ultra subscribers can also try it in AI Studio and Antigravity.
- Some countries in AI Mode. Google says Carbon in AI Mode in Search is available in select countries only.
How does Carbon compare with Claude and GPT?
On price per token, it's well under both. The Verge says the intro price is around a fifth of OpenAI's GPT-6 Astra and a quarter of Anthropic's Fable 5.2, which launched with a price cut on Monday. The Verge adds that Carbon should still be "significantly cheaper than frontier rivals on a per-token basis" after the price doubles, though that "doesn't necessarily translate to lower costs" because models use different numbers of tokens for the same job.
On quality, the big claims are Google's. Google says Carbon ranks #1 on CursorBench 4.0, Perplexity's WANDR and Zapier's AutomationBench, at more than 2x lower cost per task than the next best outside model. The Verge notes that companies "can and do cherry-pick benchmark results," and that the benchmarks Google cited when it first announced Carbon suggested it was one of the most powerful models on the market, behind Fable 5.2.
What is the "swarm" preview?
Google is previewing a /swarm feature in Antigravity that turns one prompt into "a coordinated team of agents you can track in real time." Developers can give Carbon the jobs that need the most reasoning, like design, coordination and auditing, and pair it with faster, lighter models for the rest. It's a preview, so expect it to change.
X reactions
Google and the Gemini app announced the rollout within a minute of each other, and Vercel, which sells developers access to many AI models through one account, put the intro discount front and center.
Gemini 4 Carbon is now available.
— Google (@Google) November 10, 2026
It’s our strongest model, built to dig deeper, handle long-horizon tasks, and multi-step reasoning.
If Argon is great for complex tasks, Carbon is the model you bring in for your hardest problems.
Starting today, our next frontier model Gemini 4 Carbon is rolling out to Google AI Ultra subscribers on desktop, mobile, and web at https://t.co/gTWOnOwQDE
— Google Gemini (@GeminiApp) November 10, 2026
It’s our strongest model, built to reason deeply through your most complex work:
✅ Get more thorough, reliable outputs on your toughest tasks
✅ Turn dense data and docs into polished presentations, spreadsheets, and ready-to-use reports with more precise analysis
✅ Create web apps, prototypes, and 3D scenes with stronger spatial understanding for 3D and UI design
Gemini 4 Carbon is live on AI Gateway at 50% off through Nov 30.
— Vercel Developers (@vercel_dev) November 10, 2026
Carbon improves on past models at tracing bugs, fixing them across codebases, and patching security vulnerabilities.
𝚐𝚘𝚘𝚐𝚕𝚎/𝚐𝚎𝚖𝚒𝚗𝚒-𝟺-𝚌𝚊𝚛𝚋𝚘𝚗
https://t.co/3P4bkb2fw8
Our take
This is the third big model change in two days, and for solo builders and small businesses the useful question is simple: which jobs are hard enough to deserve a top model? For most chatbots, email drafts and everyday automations, Argon, a cheaper Claude or whatever you already pay for will do fine. Carbon earns its keep on the long, fiddly jobs, like untangling a broken app or digging through a pile of dense documents.
The intro price makes those jobs cheap to try right now. Run a few of your own real tasks on Carbon and on Claude Fable 5.2, then compare the actual bill per job, since Carbon's extra thinking can eat into its lower per-token rate. And put December 1 in your calendar. If you build something on Carbon this month, budget at US$4 and US$20 per million tokens, not US$2 and US$10, so the first full-price invoice doesn't come as a surprise.
— Artificially Nerdy
What to do this week
- On AI Pro, AI Plus or the free plan: nothing to do. Carbon isn't on your plan yet.
- Already on AI Ultra? Pick Carbon in the Gemini app for one hard job this week and see whether it beats Argon for you.
- Paying API bills? Send the same real job to Carbon and your current model, and compare cost per finished job, not per token. Our guide to routing AI models and setting spending limits can help.
- Budget any Carbon build at the December 1 price of US$4/US$20 per million tokens.
- Thinking about Ultra just for Carbon? At US$99.99 a month, make sure your hardest work actually needs it first.
FAQ
Is Gemini 4 Carbon available on Google AI Pro?
Not yet. Google's plans page lists Carbon only under AI Ultra, and The Verge says it isn't clear when, or if, lower tiers or free users will get it.
How much will Gemini 4 Carbon cost after November 30?
From December 1, 2026, the Gemini API price is US$4 per million input tokens and US$20 per million output tokens, double the introductory US$2 and US$10.
Can I use Gemini 4 Carbon in AI Studio?
Yes, on the paid tier of the Gemini API in Google AI Studio. Google AI Ultra subscribers can also try it in AI Studio and Google Antigravity.
Is Gemini 4 Carbon better than Claude Fable 5.2?
It depends on the job. Google says Carbon ranks #1 on several agent and coding benchmarks at lower cost per task, while The Verge says the benchmarks Google cited earlier put Carbon among the most powerful models, behind Fable 5.2.
Sources
- Google: Gemini 4 Carbon is now available — Koray Kavukcuoglu, November 10, 2026. Who gets it and where, Argon vs Carbon guidance, intro price and December 1 price, benchmark claims,
/swarmpreview, earlier cybersecurity release. - Google: Gemini 4 Carbon is now available for developers — November 10, 2026. Paid API tier in AI Studio and Android Studio; Ultra subscribers in AI Studio and Antigravity.
- Google AI plans page — read November 10, 2026 (United States). AI Ultra at US$99.99/month (5x) and US$199.99/month (20x); Carbon listed under Ultra only; AI Mode in select countries.
- The Verge: Google releases Gemini 4 Carbon with agent 'swarm' feature — Robert Hart, November 10, 2026, 11:00am ET. Per-token comparisons with GPT-6 Astra and Fable 5.2, lower tiers unclear, benchmark caution.
- Anthropic: What's new in Claude Fable 5.2 — read November 10, 2026. Fable 5.2 API price of US$8/US$40 per million tokens.
- Google on X — November 10, 2026, 11:05am ET.
- Google Gemini (@GeminiApp) on X — November 10, 2026, 11:06am ET.
- Vercel Developers (@vercel_dev) on X — November 10, 2026, 11:24am ET.
