# Gemini 4 Carbon: Google's New Frontier Model for Cybersecurity and Long-Horizon Coding

Canonical: https://seekvero.com/en/guides/gemini-4-carbon-cybersecurity-model
Published: 2026-11-02T18:09:06.440Z
Updated: 2026-11-02T18:09:06.440Z
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Google announced Gemini 4 Carbon on Oct 28, 2026, its strongest model yet for cybersecurity defense and long-horizon engineering. Here is who can use it now, the benchmarks and the pricing.

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On October 28, 2026, Google announced Gemini 4 Carbon, built on Gemini 4 Argon (launched two weeks earlier) as its strongest model for cybersecurity defense and long-horizon engineering. Carbon ranks #1 on the Artificial Analysis Intelligence Index v5.0 at 59 and leads cybersecurity benchmarks: 88.2% on SEC-bench Pro, 54.8% on ExploitGym, and 71.0% on CWE-bench. It is not yet open to developers, businesses or consumers — Google is rolling it out first to a subset of cyber defenders and trusted partners through its Fairwind Program. When it reaches wider availability it will launch at an introductory $2 per million input tokens and $10 per million output tokens. [1]

## What Gemini 4 Carbon is

Gemini 4 Carbon is Google's next frontier model, announced on October 28, 2026, as its strongest model with state-of-the-art cybersecurity and long-horizon capabilities, built on Gemini 4 Argon, which launched two weeks earlier. [1]

Carbon ranks #1 on the recently updated v5.0 of the Artificial Analysis Intelligence Index, with a score of 59. [1]

## Who can use it right now

Gemini 4 Carbon is not yet available to developers, businesses or consumers. Google is taking a deliberate rollout: starting the week of October 28, 2026, Carbon is available to a subset of cyber defenders, with access phasing out to additional trusted partners through Google's Fairwind Program, as part of the U.S. government's voluntary process for pre-release model testing. [1]

## Cybersecurity benchmark results

Carbon targets the full cybersecurity defense lifecycle: finding vulnerabilities, validating which are exploitable, and patching the root cause. [1]

On internal benchmarks, Carbon achieves more than 2x uplift over Argon in the success rate for generating secure code. Google's Chrome team reported Carbon performed more than 10x better than another lab's large frontier model when generating high-quality patches, and Wiz observed Carbon leading its benchmarks for web penetration testing. [1]

- SEC-bench Pro (finding vulnerabilities): 88.2% — a new state-of-the-art score. [1]
- ExploitGym (validating exploitability): 54.8% — a new state-of-the-art score. [1]
- CWE-bench (patching root cause): 71.0% on Collinear's CWE-bench. [1]

## Coding and reasoning gains

Carbon jumps +89 Elo points over Argon to land at #4 (1768) on WebDev Arena, reflecting improved quality of output and artifacts in full-stack web development. [1]

## Safety and alignment changes

Carbon reduced successful cheating on Terminal-Bench 4.0 to 0.0% (with cheating attempts dropping to 0.4%) while improving overall accuracy; in live coding environments with Google's internal teams, high-severity misalignment alerts dropped by almost 80%. [1]

Carbon also cuts unsupported claims by about 2x over Argon, reduces overreach by 26% and under-service by 29%, and achieves a 0.0% attack success rate on Gray Swan's Indirect Prompt Injection Benchmark, down from Argon's 0.7%. [1]

## Pricing when it reaches wider availability

Gemini 4 Carbon will launch at the same introductory price as Argon. [1]

- Introductory input tokens: $2 per million input tokens. [1]
- Introductory output tokens: $10 per million output tokens. [1]
- Cached input tokens: 95% off the input token price. [1]
- After the introductory period: $4 per million input tokens and $20 per million output tokens. [1]

## Frequently asked questions

### Can I use Gemini 4 Carbon today?
Not yet. It is only available to a subset of cyber defenders starting the week of October 28, 2026, with phased access to more trusted partners through Google's Fairwind Program; Google says it will bring Carbon to developers, businesses and consumers soon. [1]

### How does Carbon compare to Gemini 4 Argon?
Carbon is built on Argon, which launched two weeks earlier, and improves on it: more than 2x the secure-code generation success rate, +89 Elo points on WebDev Arena, and a lower Indirect Prompt Injection attack success rate (0.0% versus Argon's 0.7%). [1]

### What will Gemini 4 Carbon cost?
At launch, an introductory $2 per million input tokens and $10 per million output tokens, with cached input tokens at 95% off the input price; after the introductory period, $4 per million input tokens and $20 per million output tokens. [1]

### What is the Fairwind Program?
It is how Google is phasing access to Gemini 4 Carbon to additional trusted cyber defense partners, as part of the U.S. government's voluntary process for pre-release model testing. [1]

### What cybersecurity tasks is Carbon designed for?
The full defense lifecycle: finding real vulnerabilities (88.2% on SEC-bench Pro), validating which are exploitable (54.8% on ExploitGym), and patching the root cause (71.0% on CWE-bench). [1]

## Sources

[1] https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-carbon/