Google announced Gemini 4 Carbon on Oct 28, 2026, two weeks after Gemini 4 Argon. It ranks #1 on the Artificial Analysis Intelligence Index v5.0 (score 59), just ahead of Claude Opus 5.5 (58) and GPT-6 Astra (57).
What’s new
Long-running coding: Google says Carbon worked for days on hard bugs in big codebases.
Security skills: 88.2% on SEC-bench Pro (finding flaws), 54.8% on ExploitGym (checking if a flaw can be abused), 71.0% on CWE-bench (fixing the root cause).
Web dev: +89 Elo, now #4 on WebDev Arena.
More honest: about 2x fewer unsupported claims than Argon.
Prompt injection: 0.0% attack success on Gray Swan’s benchmark.
Access and price
Today: select cyber defenders only, then more partners through the Fairwind Program.
Intro price: $2 / $10 per million input/output tokens, later $4 / $20.
Why it matters: An agent that stays on task and fixes bugs at the source could save real review time. Keep in mind most scores are Google-reported, and no technical report is out yet.
Tags: ai google cybersecurity programming
Media
🖼️ Security benchmark chart: https://storage.googleapis.com/gweb-uniblog-publish-prod/images/gemini_4_carbon_secbench-pro.width-1200.format-webp.webp (Carbon on SEC-bench Pro, vulnerability finding)
🖼️ Patching chart: https://storage.googleapis.com/gweb-uniblog-publish-prod/images/gemini_4_carbon_cwe-bench.width-1200.format-webp.webp (Carbon on CWE-bench, root-cause fixes)
▶️ Third-party explainer: https://www.youtube.com/watch?v=V-UtDrdOlR4
References & Credits
Google / Koray Kavukcuoglu, Gemini 4 Carbon: our next frontier model (charts: Google)
9to5Google, Engadget, VentureBeat
Reference article: AI Magazine
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