- October 3146%
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- September 301%
The story so far
written Sep 30What is happening
Google announced its new flagship Gemini 4 model, named Argon, on September 30, 2026 [1]. The company is currently providing the model to select cybersecurity partners and participating in a federal pre-release access process [1]. The public availability of Argon or a Gemini 4 Pro model would settle market outcomes for an October 2026 release [1][2].
Google has not provided a specific timeline for the public release of Argon [1]. The company has also not confirmed a public API endpoint or pricing for a Pro-tier Gemini 4 model [2].
What to watch
A Google blog post or press release confirming the Gemini Pro model is publicly available would settle the release status. The appearance of the model in Google’s product catalog or on a pricing page for general customers would also confirm availability. Reports from major tech news outlets that the public can access the model would serve as further confirmation.
Some reports anticipate a Gemini 4 Pro release in October 2026 [3]. A statement from Google confirming a specific date, public API endpoint, or pricing for a Pro-tier Gemini 4 model would clarify the release schedule [2].
Read the full brief · how we got here
How we got here
Google began pre-training for Gemini 4 on July 21, 2026 [2][4]. The most recent public releases in the Gemini line were the 3.8 Live and 3.8 Live Extended Thinking models on September 15, 2026 [4].
The Gemini 3.5 Pro model missed a targeted June 2026 release date and has not reached general availability [5][6]. Reports from July 16, 2026, indicated that model was months behind schedule due to performance shortfalls in coding benchmarks [6]. Earlier versions, including Gemini 3.1 Pro, were launched in April 2026 [8][9].
References · 8
- [1]reuters.com — Google announces Gemini 4 flagship AI model after months of delays
- [2]seeapi.com — Gemini 4 Pro: Check the Release, API and Pricing Facts
- [3]geeky-gadgets.com — When is the Google Gemini 4 Pro Release Date Expected - Geeky Gadgets
- [4]felloai.com — Gemini 4: Release Date, Pre-Training News & Rumors
- [5]techjournal.org — Gemini 3.5 Pro Release Date: Features & Price (2026)
- [6]reuters.com — Google Gemini launch delayed as tech falls short of internal goals ...
- [8]tech-insider.org — Gemini Hits 750M Users + 3.1 Pro Launch [April 2026]
- [9]blog.google — Gemini 3.1 Pro: Announcing our latest Gemini AI model
What would close this
0 of 3 metTimeline
newest firstWhen we started following: Google announces Argon flagship model as Gemini 3.5 Pro remains unreleased
Google announced a new flagship AI model named "Argon" on September 30, 2026, to anchor its Gemini 4 generation [1]. The company is currently providing Argon to select cybersecurity partners and participating in a voluntary federal pre-release access process, but it has not provided a timeline for a public release [1]. This announcement follows the July 21, 2026, start of Gemini 4 pre-training [2][4].
Concurrently, the previously announced Gemini 3.5 Pro model has not reached general availability despite a targeted June 2026 release date [5][6]. Reports from July 16, 2026, indicated the model was months behind schedule due to performance shortfalls in coding benchmarks [6]. While some reports anticipate a Gemini 4 Pro release in October 2026 [3], Google has not confirmed a specific date, public API endpoint, or pricing for a Pro-tier Gemini 4 model [2]. The most recent public releases in the Gemini line were the 3.8 Live and 3.8 Live Extended Thinking models on September 15, 2026 [4]. The public availability of Argon or a Gemini 4 Pro model would settle the Polymarket outcomes for October 2026.