Gemini 4 Carbon leaks across Google Cloud SKUs, AI Studio paywall and app menus

Starting November 10, Google's next-generation model "Gemini 4 Carbon" has been leaked in multiple places, but Google has issued no confirmation. The leaks began with testingcatalog, which found three Gemini 4 Carbon variants — Low, Medium, High — in the latest Google Antigravity build, along with an entry resembling "gemini-4-carbonccpa".

Confirmed

• testingcatalog discovered Low, Medium, and High variants of Gemini 4 Carbon plus related entries in an Antigravity build — the closest thing to a primary source in this cluster
• Multiple Reddit users (ThenFlounder6906, Clear-Complaint-322, StrangeWitness2449, DrCataclysm) posted highly consistent screenshots of the Gemini app's model picker: Quick answers maps to 3.5 Flash-Lite, the general assistant to 3.8 Flash, and a new "4 Carbon" entry appears above the Code & analysis tier — some with a lock icon, marked unavailable or labeled New
• Some screenshots also showed unreleased models like Gemini 4 Argon (Medium/High, New) and 3.8 Flash (High), and even a Claude Opus 5.5 entry
• A screenshot relayed by SRRSMITH from a Gemini Pro user showed a new locked "Most complex work: 4 Carbon" entry in the mode list

Not Yet Confirmed

• markk declared "Gemini 4 Carbon is here" citing what was claimed to be a live demo and tagged @GoogleDeepMind, but received no official response
• CodeByPoonam claimed to have generated a portrait of Sundar Pichai using "Gemini 4 Carbon" with an attached image; the post had no further detail and its authenticity is unverified
• A GCI (Generic Capability Index) tracking chart posted by scaling01 showed Gemini 4 Carbon scoring around 134, above Gemini 4 Argon (around 130+); the leaderboard's source and credibility are unclear
• A Reddit leak relayed by muzaffer22 claimed Gemini 4 Carbon would launch that same day, backed only by a screenshot of a Google engineer Logan Kilpatrick tweet containing the single word "Gemini" — no official source, and no launch followed

Why It Matters

If the leaks hold, Carbon would be Google's more powerful next-gen model following Gemini 4 Argon, offered in Low/Medium/High tiers — hinting Google may shift toward multi-tier, task-complexity-based model selection. Multiple independent screenshots corroborate each other, boosting the leaks' credibility, but until an official release, all model names, capabilities, and timing should be treated as rumor.

2026-11-10 ~ 2026-11-11 · 18 related posts

Full story(7 episodes)→

• Episode 1: Gemini 4 Carbon leaks across Google Cloud SKUs, AI Studio paywall and app menus(2026-11-10, 18 posts)
• Episode 2: Gemini 4 Carbon lands on AI Studio and Vertex with pricing revealed(2026-11-10, 3 posts)
• Episode 3: Google launches Gemini 4 Carbon, its strongest long-horizon frontier model(2026-11-11, 45 posts)
• Episode 4: Gemini 4 Carbon Launches: Early Tests Show Big Coding Gains Over Argon(2026-11-11, 10 posts)
• Episode 5: Gemini 4 Carbon Crafts 3D Pop-Up Book Site and Fictional Instrument Page(2026-11-11, 3 posts)
• Episode 6: Carbon Test Series Wraps: Model Builds and Self-Fixes FPS Game and Poster Editor(2026-11-11, 2 posts)
• Episode 7: Google brings Gemini 4 Carbon to Search AI Mode for Ultra subscribers(2026-11-11, 2 posts)

• Unverified rumor claims 'Gemini 4 Carbon' launching today, based on a one-word teaser — muzaffer22 · 2026-11-10
• [source] Gemini 4 Carbon spotted in GCP SKU catalog and reportedly callable on Vertex AI — testingcatalog · 2026-11-10
• Unverified rumor: Gemini 4 Carbon rumored to launch today as UGI board shows Argon tiers — Eissa_Cozorav · 2026-11-10
• [source] Leak: Gemini 4 Carbon in AI Studio to require Google AI Ultra plan or API key — testingcatalog · 2026-11-10
• [source] Gemini 4 Carbon Low/Medium/High variants spotted in Google Antigravity build, not yet public — testingcatalog · 2026-11-10
• Gemini 4 Carbon spotted on Google Cloud with 1M output tokens and agentic coding focus — testingcatalog · 2026-11-10
• Gemini 4 Carbon reportedly lands today; Scale's "Sixth Sense" benchmark already saturated by Gemini — zacharynado · 2026-11-11
• Unverified screenshot claims Gemini Carbon is live, also lists Claude Opus 5.5 — Strange_Witness_2449 · 2026-11-11
• Gemini 4 'Carbon' rumor heats up as demo surfaces, unconfirmed by Google — mark_k · 2026-11-11
• Gemini app screenshot reveals unconfirmed '4 Carbon' top-tier model slot — DrCataclysm · 2026-11-11
• Rumored 'Gemini 4 Carbon' shown generating a portrait of Sundar Pichai — CodeByPoonam · 2026-11-11
• Leaked Gemini model picker shows 3.5 Flash-Lite, 3.8 Flash, 4 Argon and 4 Carbon — Then_Flounder6906 · 2026-11-11
• Screenshot Surfaces Purportedly Showing Unreleased Gemini 4 Carbon Model Slot — Clear-Complaint-322 · 2026-11-11
• Gemini 4 Carbon spotted on GCI chart scoring ~134, above Gemini 4 Argon — scaling01 · 2026-11-11
• Gemini Pro user's screenshot shows a locked '4 Carbon' model tier in the UI — SR_RSMITH · 2026-11-11
• Unverified: Google blog link claims Gemini 4 Carbon is now available — aigclink · 2026-11-11
• Gemini 4 Argon slated for Oct 13 and Carbon for Nov 10 as Google DeepMind shipping season begins — MickeySteamboat · 2026-11-11

1 near-duplicate retellings: testingcatalog