Yesterday, Google announced its latest Gemini 4 Carbon model, which is said to be the strongest model with state-of-the-art cybersecurity and long-horizon capabilities.
Introducing Gemini 4 Carbon, our latest frontier model.
Carbon delivers improved performance across domains — ranking #1 on v5.0 of the @ArtificialAnlys Intelligence Index and sets a new state-of-the-art in cybersecurity and long-horizon capabilities.
It’s rolling out starting… pic.twitter.com/oQrHzxvMSo
— Google (@Google) October 28, 2026
Gemini 4 Carbon
Gemini 4 Carbon is built on Gemini 4 Argon. Designed to take on much harder, long-horizon engineering problems, Carbon is built for sustained agentic workflows. Building on user feedback, Google has focused on improving model performance across a variety of domains, including coding, agentic, and scientific tasks, as well as full-stack web development and multimodal understanding.
Carbon ranks #1 on the recently updated v5.0 of the Artificial Analysis Intelligence Index at 59. It shows significant gains across coding and agentic tasks, as well as across key capabilities critical for cybersecurity defense, landing a firm lead in SEC-bench Pro (88.2%) for finding vulnerabilities, ExploitGym (54.8%) for exploitation, and CWE-bench (71.0%) for patching. On internal benchmarks, Carbon drives a strong uplift in generating secure code, and in live coding environments with Google’s own teams, it shows reduced misalignment and fabrication rates.
Gemini 4 Carbon delivers a significant leap in cybersecurity capabilities. It achieves state-of-the-art performance across the cybersecurity defense lifecycle — vulnerability detection, validation, and remediation.
The model is built on the same multi-layered safety and security stack as Argon — combining model training, real-time misuse defenses, prompt-injection resilience, and chain-of-thought monitoring.
Gemini 4 Carbon is trained to respond to complex or high-pressure tasks in the right way. The model is advanced with safety and security:
- Reduced shortcuts and loophole exploitation
- Greater transparency and honesty
- Improved collaboration with the users in the face of ambiguity
- Following through without overstepping
- Resisting prompt injection
Availability
The company is taking a deliberate approach to rollout and is actively engaged in the US government’s voluntary process for pre-release model testing.
Starting this week, Google will make Carbon available to a subset of cyber defenders and will gradually phase access to additional trusted partners through its Fairwind Program. The company is continuing to gather feedback and iterate on guardrails before making Carbon available to developers, businesses, and consumers via Google’s product surfaces as soon as possible.
Gemini 4 Carbon will launch at the same introductory price as Argon at $2 per million input tokens and $10 per million output tokens, with cached input tokens priced at 95% off the input token price.
