Gemini 4 Carbon's hallucination rate on Artificial Analysis' AA-Omniscience knowledge test was 11%, up from 4% for Gemini 4 Argon

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Google released Gemini 4 Carbon to paying developers and businesses, with Sundar Pichai announcing the rollout in a post on X

Google DeepMind released Gemini 4 Carbon on October 28, 2026, calling it Google's strongest AI model

Gemini 4 Carbon makes Google the leader of the AI race

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Google unveiled Gemini 4 Carbon, its latest frontier AI model, focused on complex coding and cybersecurity

At its October 2026 launch, Gemini 4 Carbon was available only to selected cybersecurity defenders through Google's Fairwind Program

At its October 2026 launch, Google priced Gemini 4 Carbon at an introductory $2 per million input tokens and $10 per million output tokens, rising later to $4 and $20

In October 2026, Gemini 4 Carbon ranked first on the Artificial Analysis Intelligence Index v5 with 59 points, ahead of Claude Opus 5.5 at 58 and GPT-6 Astra at 57

In October 2026, Google said Gemini 4 Carbon would reach developers, businesses and consumers after it refined the guardrails, without giving a date

Google should release Gemini 4 Carbon to everyone instead of only to selected cyber defenders

A higher hallucination rate is an acceptable price for Gemini 4 Carbon's benchmark gains

Google said its Chrome security team found Gemini 4 Carbon's software patches more than 10 times better than those of another lab's frontier model

Anthropic's Claude Opus 5.5 beat Gemini 4 Carbon on Artificial Analysis' Coding Agent Index in October 2026, 62 to 59

Google released Gemini 4 Carbon 15 days after Gemini 4 Argon's wide rollout on October 13, 2026

In Google's October 2026 launch comparison, Gemini 4 Carbon had the top score on 15 of 17 benchmarks

Google reported that Gemini 4 Carbon scored 88.2% on the SEC-bench Pro vulnerability-finding benchmark with its safety guardrails turned off

Google reported a 0.0% attack success rate against Gemini 4 Carbon on Gray Swan's indirect prompt-injection benchmark, down from 0.7% for Gemini 4 Argon

As of October 28, 2026, Google had not said when Gemini 4 Carbon's introductory pricing would end

Artificial Analysis measured Gemini 4 Carbon's cost per Intelligence Index task at $7.76 in October 2026, about 23% less than Claude Opus 5.5's $10.04

Frontier AI models should go to trusted cyber defenders before public release