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Gemini 4 Carbon: From SKU Leak to Official Launch

Gemini 4 Carbon first surfaced in GCP SKU listings and AI Studio prompts on Nov 10, then hit Vertex with pricing revealed, before Google officially launched the next-gen frontier model on Nov 11, rolling it out to Search's AI Mode.

2026-11-10 ~ 2026-11-11 · 5 episodes · 37 posts

Episode 1 · Gemini 4 Carbon Reportedly Appears on Google Cloud (2026-11-10, 2 posts)

Google's unreleased Gemini 4 Carbon has reportedly appeared in GCP's SKU catalog and Agent Studio, supporting long-horizon agentic coding with up to 1 million tokens of output.

Episode 2 · Gemini 4 Carbon Reportedly Requires Ultra Subscription or API Key (2026-11-10, 2 posts)

Leaker testingcatalog spotted a new upgrade prompt in Google AI Studio suggesting the unreleased Gemini 4 Carbon will require a Google AI Ultra subscription or an API key, possibly alongside the Gemini app. The claim remains unverified.

Episode 3 · Gemini 4 Carbon lands on AI Studio and Vertex with pricing revealed (2026-11-10, 3 posts)

Google's Gemini 4 Carbon has appeared on Vertex AI and AI Studio: positioned as its strongest deep-work model for long-horizon agentic coding with 1M output tokens, priced at $2 input / $10 output per million tokens, requiring an Ultra subscription or API key.

Episode 4 · Google launches Gemini 4 Carbon, its strongest model, rolling out to Ultra subscribers and API developers (2026-11-11, 28 posts)

On November 11, Google CEO Sundar Pichai and the official Google AI account simultaneously announced the release of Gemini 4 Carbon, a new frontier model rolling out the same day to Google AI Ultra subscribers worldwide across desktop, mobile, and the web-based Gemini App. Google positions it as the most capable Gemini model to date, purpose-built for sustained long-horizon tasks, with deep reasoning across complex knowledge work, software engineering and web development, cybersecurity, and scientific reasoning, and frontier-level performance in agentic workflows. Current status: the model is officially available, but initially only to Ultra subscribers and API developers; Pro-tier subscribers do not yet have access.

Confirmed

  • Announcement channels: Sundar Pichai, GoogleAI, and GeminiApp official accounts all posted the announcement with links to the official blog, with consistent content (m1, m3, m4, m16).
  • Availability: accessible to AI Ultra subscribers in the Gemini App; developers can use it via the Gemini API (AI Studio) and Antigravity (m2, m5, m7, m8, m12).
  • Performance and capabilities: developer relations engineer patloeber called it a major leap over the previous-generation Argon, with identical API features and unchanged pricing (m7); Philipp Schmid reported bug recall improved by more than 25% over Argon (m8, m12); koraykv (official Google post) said the model tops multiple independent benchmarks, including Cursor-related ones, and internal teams have already used it to assist in mathematically proving Signal's core cryptographic protocols (m9).
  • Industry reaction: Hugging Face's Omar Sanseviero (now on the Google team) assessed it as clearly stronger than Argon and a significant upgrade (m10, m11).

Unconfirmed

  • Capability details mentioned by testingcatalog and full benchmark data await the official blog and subsequent reviews (m6).
  • No official timeline for when Pro-tier subscribers will get access (m6).

Why it matters

  • Gemini 4 Carbon arrived only weeks after the previous-generation Argon went live (m13), a markedly accelerated release cadence reflecting Google's aggressive strategy in the frontier-model race.
  • Its focus on long-horizon agentic workflows and cybersecurity directly targets high-value scenarios like complex software engineering and scientific discovery.
  • API pricing is on par with Argon while performance has improved substantially (25%+ better bug recall), offering developers significantly better value.

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Episode 5 · Google brings Gemini 4 Carbon to Search AI Mode for Ultra subscribers (2026-11-11, 2 posts)

Google has started rolling out Gemini 4 Carbon in Search's AI Mode for AI Ultra subscribers, touting deeper reasoning, better instruction following, and more in-depth back-and-forth conversations.