Google rolled out Gemini 4 Carbon on November 10, 2026, for coders, firms, and paid users. The release follows a two-week test for cyber defense teams inside Google’s Fairwind program.
Gemini 4 Argon still handles daily coding and fast office work. Carbon goes further. It uses more thinking steps to hunt down hard bugs, check math proofs, and find deep code flaws.
Key Takeaways: Gemini 4 Carbon
- Intro API Rates: Google charges $2 per million input tokens and $10 per million output tokens through November 30, 2026, per Google AI Studio docs. Prices double to $4 and $20 on December 1.
- Top Test Scores: Carbon leads CursorBench 4.0, Perplexity WANDR, and Zapier AutomationBench. It also holds #2 on the Artificial Analysis Multimodal Knowledge Agent test.
- Swarm Agent Mode: A new
/swarmtool in Google Antigravity lets one prompt split work across a team of agents and checkers.- Cyber Defense Gains: Google claims 100% scan recall in Project Fortify, while outside testers at Trajectory Labs found zero universal jailbreaks across 132 hours.
API Rates and Access Tiers
Google tied the rollout to a short intro price deal. Coders in Google AI Studio pay $2 per million input tokens and $10 per million output tokens until November 30, 2026.
On December 1, rates double to $4 input and $20 output per million tokens. Cached input tokens sit at $0.10 per million. Google AI Ultra members also get Carbon inside Google Antigravity, the Gemini app, and Search AI Mode.
| Metric or Tier | Gemini 4 Carbon Detail | Source Type |
|---|---|---|
| Intro API Price (through Nov 30, 2026) | $2 / 1M input tokens, $10 / 1M output tokens | Official Google pricing |
| Standard API Price (from Dec 1, 2026) | $4 / 1M input tokens, $20 / 1M output tokens | Official Google pricing |
| Agent Coding and Search | #1 on CursorBench 4.0, WANDR, AutomationBench | Third-party benchmarks |
| Multimodal Knowledge Agent | #2 overall at over 6x lower task cost than #1 | Joint Artificial Analysis launch |
| Project Fortify Scanning | 100% scan recall, 95% triage precision | Internal Google claim |
The pricing launch comes alongside custom hardware updates, covered in our story on Google’s 8tx and 8i Max TPU chips. Early posts in the r/GeminiAI release thread liked the low launch rate. Users warned that long token loops could raise bills fast after December 1.
Outside Benchmarks vs. Google Claims
It helps to split third-party tests from Google’s own sales claims. Outside benchmarks rank Gemini 4 Carbon #1 on CursorBench 4.0, Perplexity WANDR, and Zapier AutomationBench. Google says Carbon cuts per-task costs by over 2x next to the runner-up.
Google teamed up with Artificial Analysis to launch the Multimodal Knowledge Agent test. That suite checks how well tools read charts, tables, and dense PDF files. Carbon took #2 while costing over 6x less per job than the #1 model.
Finance shops ran early trials too. Carbon tied for first on Hebbia’s end-to-end finance suite and topped 23 setups on Balyasny Asset Management’s finance test. Still, builders on r/accelerate stress that real speed and token bills matter more than lab charts.
Swarm Loops and Science Results
To handle big builds, Google added a /swarm preview to Google Antigravity. One prompt can spawn a lead agent that splits tasks across parallel workspaces and checker bots.
In Google’s tests, one swarm turned seven city PDFs with 206 drawings into a 906,000-triangle 3D model of Google’s Platform 37 office in 10 overnight runs. Another build turned X-rays and CAD files into a working 1780 piano app.
Beyond 3D scenes, Google shared real code and science wins:
- Math Code Proofs: Teams used AlphaProof Code with Carbon to prove security traits in Signal’s code using Lean in weeks rather than years. Read more in our report on DeepMind AlphaProof Code Signal checks.
- Drug Safety Labs: Drug tester Axiom Bio moved main lab runs to Carbon and Argon after Carbon spotted new toxicity clues in lab notes.
- Protein Search: Across seven hard protein groups from CASP17, Google says Carbon found 40 times more genetic matches on average.
Red-Team Tests and Safety Limits
Cyber defenders got Carbon early under Fairwind because the model finds code flaws fast. Google says it leads SEC-bench Pro for finding bugs, ExploitGym for testing risks, and CWE-bench v1 for writing clean fixes. Wiz testers in the Scan for Good plan also found zero-day bugs in two large SaaS apps in under two hours.
Vendors keep adding smart models to security tools, as seen when Cisco added Claude Mythos red-teaming to AI Defense. To stop abuse, Google added tighter safety rules before broad launch.
On internal cyber tests with ExploitBench and CyScenarioBench, Carbon blocked 99% of attack runs, cutting breach rates to 0.8% from 3.1% on Argon. Outside labs tested it too. Gray Swan saw bad cyber prompt rates drop from 9.86% on Argon to 2.17% on Carbon, plus a 0% score on prompt injection traps. Trajectory Labs found zero universal jailbreaks across 132 hours and 13,000 prompts.
Even so, Google notes that indirect prompt injection defense needs steady updates as attacks shift. On Google’s 375-task honesty test, Carbon refused to fake missing lab data 98% of the time and passed 92% of tasks overall.
Frequently Asked Questions
How much does the Gemini 4 Carbon API cost?
Google charges $2 per million input tokens and $10 per million output tokens through November 30, 2026. On December 1, standard rates double to $4 input and $20 output.
How does Gemini 4 Carbon differ from Gemini 4 Argon?
Argon serves best for daily coding and fast office work at lower cost. Carbon uses extra thinking steps for deep bugs, math proofs, science checks, and cyber defense.
Where can developers and paid users try Gemini 4 Carbon?
Coders can call the API in Google AI Studio, Android Studio, and Gemini for business. Google AI Ultra users can try it in Google Antigravity, the Gemini app, and Search AI Mode.
Did outside labs test Gemini 4 Carbon safety claims?
Yes. While Project Fortify scores come from Google itself, outside groups like Gray Swan and Trajectory Labs tested cyber misuse, prompt traps, and jailbreak checks before launch.
