Gemini 4 Carbon

by Google

Gemini 4 Carbon is a model from Google, released on October 28, 2026. It ranks #2 of 247 models by Intelligence Score with a score of 58.8.

Gemini 4 Carbon is Google DeepMind's next frontier model, announced on 2026-10-28, which Google describes as "our strongest model with state-of-the-art cybersecurity and long horizon capabilities." It builds on Gemini 4 Argon, with gains in vulnerability finding, exploit validation, patching, and long-horizon agentic coding. At announcement it is in a limited rollout: available only to a subset of cyber defenders and, in phases, to trusted partners through Google's Fairwind Program, with availability to developers, businesses, and consumers planned later. Google states it will launch at the same introductory price as Argon ($2.00 per million input tokens, $10.00 per million output tokens, cached input 95% off), moving to $4.00/$20.00 after the introductory period. There is no public API endpoint yet.

Key specs

ProviderGoogle
Release date2026-10-28
Licenseproprietary
Intelligence Score58.8
Coding index48.3

Quick answers

Is Gemini 4 Carbon open source?

No. Gemini 4 Carbon is a proprietary model from Google (proprietary license).

When was Gemini 4 Carbon released?

Google released Gemini 4 Carbon on October 28, 2026.

How does Gemini 4 Carbon compare to Claude Opus 5.5 (Reasoning)?

Gemini 4 Carbon scores 58.8 on the Intelligence Score versus 59.9 for Claude Opus 5.5 (Reasoning), the current #1.

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