Gemini 4 Argon becomes generally available in the Gemini API, Antigravity and the Gemini app

On October 13, 2026, Google made Gemini 4 Argon generally available in the Gemini API, in Antigravity for Ultra subscribers, and in the Gemini app and AI Mode, with introductory pricing through November 30, 2026.

Archive entry: this covers an event from October 13, 2026, and we published it on November 8, 2026. The details come from sources dated at the time and may have changed since.

On October 13, 2026, Google made Gemini 4 Argon generally available, as described in the Gemini 4 Argon announcement on The Keyword. The release came two weeks after the model's gated debut.

Availability and pricing

Argon became generally available in the Gemini API through Google AI Studio, in Google Antigravity for Ultra subscribers, and in the Gemini app and AI Mode for Pro and Ultra subscribers.
Introductory pricing ran through November 30, 2026: $2 per 1M input tokens and $10 per 1M output tokens, with cached input at 95% off. After that date the price was set to become $4 per 1M input and $20 per 1M output.
The Gemini API offered a 1M-token unified input-output limit, with a continuation protocol for long decodes.
Google offered 10,000 scientists its highest Antigravity usage tier free for 6 months and expanded Fairwind to hundreds of additional partners.

Results Google reported

Google said Argon ranked #1 on the Vals Index.
Inside Google, Argon in Antigravity increased agentic code submissions by more than 35% and reduced code rollbacks by nearly a third.
For the ADK Python framework, Argon changes cut in-memory session preparation time by 40% in long sessions and sped up cold imports by 21%.
Argon achieved a 2.85x end-to-end inference speedup for Gemma 4 E2B on an A100 via vLLM, from about 37,900 to over 108,000 tokens per second.
On Gray Swan's Indirect Prompt Injection benchmark, Argon cut attack success to 0.7% across 15 adaptive attempts.

What it meant for builders

Google's Gemini 4 frontier model became available to developers globally through the Gemini API and to Pro and Ultra subscribers in the Gemini app. For teams choosing a model, the dated introductory price and the 1M-token limit were the concrete terms to plan around. Google also posted developer details, Gemini app details, the Gemini API changelog and the Gemini Apps release notes.

Sources

Gemini 4 Argon: Built to solve your hardest problems (Google (The Keyword), October 13, 2026, official)
Gemini 4 Argon is now available for developers (Google (The Keyword), October 13, 2026, official)
Gemini 4 Argon comes to the Gemini app (Google (The Keyword), October 13, 2026, official)
Gemini API changelog: October 13, 2026 (Google AI Studio (Gemini API changelog), October 13, 2026, official)
Gemini Apps release notes: 2026.10.13 (Google (Gemini Apps release notes), October 13, 2026, official)

Written with AI assistance, strictly from the sources listed above. Before it went live, automated checks verified its dates, sources and every language edition.