Google CEO Sundar Pichai announced on X that the Gemini platform has reached more than 1 billion monthly active users, calling it the company's fastest-growing product ever and its 14th to cross the billion-user threshold. At the same time, Google's official channels and third-party reporting show that two Gemini 4 variants, Argon and Carbon, have been announced and released in limited form: Argon was announced September 30 and launched in limited form around mid-October; Carbon was announced October 28 with immediate limited access. A NokiaPowerUser report citing internal leaks describes a different "Gemini 4" model as having entered pre-training with a target launch window that has already passed.
The User Milestone #
Pichai's post, quoted by NokiaPowerUser, read: "1B+ people are now using @Geminiapp every month to spark new ideas and get things done. It's our fastest growing product ever, and our 14th to hit the 1B-user mark." Google's announcement did not include an independent verification or a detailed breakdown of what counts as an active user across Gemini surfaces (app, web, Workspace integrations, API). If accurate, the milestone would place Gemini alongside other Google properties reported to have passed 1 billion users, such as Search, Gmail, YouTube, Maps, and Android.
What "Gemini 4" Actually Means Right Now #
The NokiaPowerUser leak describes a single "Gemini 4" model entering pre-training with benchmarks targeting Anthropic's Claude Fable 5 and OpenAI's GPT-5.6 Sol. The leak lists a target launch window of late August to early September 2026 and a focus on autonomous agents, coding, and multi-hour tasks. The leak's benchmark targets reference Claude Fable 5 and GPT-5.6 Sol, models not mentioned in any official Anthropic or OpenAI announcements in the provided sources.
Google's official channels tell a different story. On September 30, 2026, NokiaPowerUser reported that Google DeepMind announced Gemini 4 Argon [2], a model with a 1-million-token output window designed for long-horizon reasoning and multi-file software engineering. Argon was made available to developers via Google Cloud Vertex AI at introductory pricing of $2 per million input tokens and $10 per million output tokens, with general API access via Vertex AI and Google AI Studio expected "in the coming days" according to NokiaPowerUser's reporting on the rollout stages. According to NokiaPowerUser, cybersecurity firm Wiz used Argon to discover a previously unknown critical vulnerability in global healthcare software [2].
Google's official blog announced Gemini 4 Carbon on October 28, 2026, describing it as "our strongest model with state-of-the-art cybersecurity and long horizon capabilities" [4]. The blog notes Carbon builds on Argon, "which was launched two weeks ago"—placing Argon's launch around mid-October, while NokiaPowerUser and TeamoRouter cite a September 30 announcement; the difference may reflect announcement versus broader availability dates [2][3][4]. Carbon is initially restricted to a subset of cyber defenders through Google's Fairwind Program, with a gradual rollout planned. Google published benchmarks showing Carbon at 88.2% on SEC-bench Pro (vulnerability detection), 54.8% on ExploitGym (exploitation), and 71.0% on CWE-bench (patching). Pricing matches Argon's introductory rates.
Both Argon and Carbon carry the "Gemini 4" branding. Neither is described by Google as being in pre-training; both are announced, benchmarked, and in limited deployment as of November 2026.
Leaks vs. Official Releases #
The NokiaPowerUser report appears to conflate or predate Google's actual Gemini 4 releases. Its "pre-training" timeline points to a launch window that has already closed, while Google has already shipped two Gemini 4 models. NokiaPowerUser's reporting on this cycle includes SDK code findings and leak-tracking summaries; its earlier August report noted a gemini-4-flash-preview string in tokenizer code, which TeamoRouter's November 8 analysis confirms was a leak, not a released model [3]. Google has not announced a Gemini 4 Flash variant.
What's Actually Available #
Currently, developers can access:
- Gemini 4 Argon (
gemini-4-argon) on Vertex AI; Google AI Studio access is rolling out per Google's stated timeline
- **Gemini 4 Carbon** (`gemini-4-carbon` ) via the Fairwind Program for cyber defenders only
- **Gemini 3.8 Flash** (`gemini-3.8-flash` ), the current general-purpose Flash model
According to TeamoRouter's summary of the AI Studio model list, the main Gemini versioned families shown for general-purpose models are 2.5 and 3.x, with 2.5 models deprecated and set to auto-route to 3.5/3.8 equivalents by December 1, 2026 [3]. The AI Studio model list also shows additional categories including audio models, generative media models, music generation models, tool and agent models, specialized task models, and previous models [5]. The Gemini 4 models are not listed there, and TeamoRouter suggests they may be Vertex AI-first releases or not yet surfaced in the AI Studio UI [3][5].
The Competitive Framing #
The leak's benchmark targets—Claude Fable 5 and GPT-5.6 Sol—serve as rhetorical markers rather than verified comparisons. Google's own benchmarks for Carbon compare against "another lab's large frontier model" without naming it, and against public benchmarks like SEC-bench and ExploitGym [4].
What Remains Unknown #
- Whether the 1 billion monthly active user figure represents unique individuals or aggregated sessions across products
- When or if Gemini 4 Carbon will expand beyond the Fairwind Program
- Whether a Gemini 4 Flash (codenamed Hydrogen in leaks) will ship, and on what timeline
- Whether independent verification of Argon's and Carbon's benchmark claims will emerge outside Google's testing environment
Google's pace from Argon (announced September 30, with broader launch around mid-October) to Carbon (October 28) suggests a compressed release cadence for the Gemini 4 family. The NokiaPowerUser leak, while sourcing real SDK findings, appears to describe a product cycle that Google has already executed differently—shipping two specialized Gemini 4 models rather than a single flagship in pre-training.
Sources #
1. [Gemini 4 Enters Pre-Training as Gemini Hits 1B Users](https://nokiapoweruser.com/gemini-4-leak-pre-training-1-billion-users-fable-5-gpt-5-6) (nokiapoweruser.com)
2. [Gemini 4 Argon Added to Google Cloud Vertex AI: Release Near](https://nokiapoweruser.com/gemini-4-argon-google-cloud-release-imminent) (nokiapoweruser.com)
3. [Gemini 4 Flash (Hydrogen) Release Date: What We Know ...](https://teamorouter.com/blogs/gemini-4-flash) (teamorouter.com)
4. [Introducing Gemini 4 Carbon](https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-carbon) (blog.google)
5. [Models - Gemini API | Google AI Studio](https://ai.google.dev/gemini-api/docs/models) (ai.google.dev)