Google DeepMind releases Gemini 4 Argon to developers and paid subscribers

Google DeepMind made Gemini 4 Argon globally available on 13 October. Developers and enterprises can use it through the Gemini API in Google AI Studio and the Gemini platform. Google AI Ultra subscribers also get it in Google Antigravity, an agentic development platform, and AI Pro and Ultra subscribers in the Gemini app and AI Mode in Search.

Google DeepMind says Argon ranks first on the Vals Index, which tests models on finance, coding, legal and tax work. Inside Google, teams using Argon in Antigravity raised their agents’ code submissions by more than 35% and cut rollbacks by nearly a third. The model reads text, images, audio, video and PDFs and replies in text.

Google DeepMind’s comparison with GPT-6 Astra, Claude Fable 5.1 and Claude Opus 5.5 puts Argon highest or joint highest on 14 of 19 results.

Key numbers

• Introductory API price until 30 November 2026: $2 per million input tokens and $10 per million output, thinking included
• From 1 December 2026: $4 per million input tokens and $20 per million output
• Cached input: 95% cheaper, through implicit caching only
• Context window: 1,048,576 tokens for input, thinking and output combined, with replies beyond 64k tokens through long decode

Safety and access

The model card says Google DeepMind cannot rule out that Argon has reached the critical capability levels for biological and cyber risks in its Frontier Safety Framework, levels at which a model without safeguards could help cause severe harm, or a lower threshold for stealth and situational awareness. It says its safeguards bring the risk below each of them.

Cyber defenders in the Fairwind Program, which had Argon first, can apply for a version without cyber guardrails, and the programme is expanding to hundreds more partners. Google DeepMind is also offering 10,000 scientists the highest usage tier in Antigravity free for six months, subject to eligibility, capacity and selection.

In the Gemini API, the free tier and the Google AI Pro plan don’t include Argon. Google DeepMind says the rest of the Gemini 4 family will follow Argon, but hasn’t said when.