Google DeepMind Unveils Gemini 4 Argon with 1M Output Tokens for Coding, Knowledge Work and Cyber Defense

Google DeepMind has just announced Gemini 4 Argon, its new frontier model and the first model of the Gemini 4 generation. It targets long-horizon software engineering, enterprise knowledge work in legal and finance, and cybersecurity defense. The biggest technical change is output length. Argon can generate up to 1M tokens in a single response, up from 64K on earlier Gemini models.

What Google Announced

Google DeepMind described Argon as built for complex workflows across coding, enterprise knowledge work and cybersecurity defense.

Google is taking a phased approach. It is participating in the U.S. government’s voluntary process for pre-release model access. It will gather feedback from early testers and iterate on guardrails before a wider release.

Pricing is already public. Argon launches at an introductory $2 per 1M input tokens and $10 per 1M output tokens. Cached input tokens get a 95% discount, which works out to $0.10 per 1M. After the introductory period, pricing moves to $4 input and $20 output. Logan Kilpatrick confirmed the introductory $2 in and $10 out pricing.

Why the 1M Output Limit Matters

Current frontier APIs cap a single response far lower. Claude Opus 5.5, Claude Fable 5.1 and GPT-6 Astra each allow 128K output tokens.

Google team states that Argon can think deeply and generate hundreds of thousands of tokens in one trajectory. For developers, that means large refactors or long reports without splitting work across turns. The cost is real, though. A full 1M output tokens costs $10 at introductory pricing and $20 after.

Google has not disclosed Argon’s input context window.

Benchmarks: Where Argon Leads and Where It Trails

Google compared Argon against GPT-6 Astra, Claude Opus 5.5 and Claude Fable 5.1. Argon leads outright on 12 of 18 benchmarks and ties for first on 1.

Where it leads:

• DeepSWE v1.1 (long-horizon software engineering): 77.9%, a new state of the art. Opus 5.5 scores 74.2% and GPT-6 Astra 74.1%.
• Vals Index (economic impact across finance, coding, legal and tax): 68.9%, ranked first.
• AutomationBench (Zapier, end-to-end business execution): 51.3%, ranked first. Opus 5.5 scores 42.5%.
• Harvey Legal Agent Benchmark: 19.6%, against 5.4% for GPT-6 Astra.
• LVBench (long video understanding): 91.7%, a new state of the art.

Where it trails:

• FrontierSWE v2: 55.0%, behind GPT-6 Astra at 65.5%.
• Terminal-Bench 4.0: 57.4%, behind Claude Opus 5.5 at 66.4%.
• OSWorld-2.0 (computer use): 69.2%, behind GPT-6 Astra at 72.6%.

Artificial Analysis reported that Argon equals GPT-6 Astra on its Intelligence Index at 60% of the cost per task, using discounted prices.

Cyber Defense: Find, Validate, Patch

Google trained Argon to autonomously find, validate and patch critical software vulnerabilities. Trusted defenders and internal Google teams receive it without cyber guardrails.

On CWE-bench v1, which tests vulnerability remediation, Argon ties for first at 68%. The rival models on that leaderboard run inside their own agent harnesses.

Wiz is already using Argon through its Scan for Good initiative. The model found a critical vulnerability in healthcare software used by hospitals worldwide. Google says previous frontier models had missed it.

Before broad release, Google is strengthening safeguards in 4 areas:

• Misuse defenses for cyber and CBRN risks, including activation monitoring, under its Frontier Safety Framework.
• Indirect prompt injection resistance, where Argon leads Gray Swan’s IPI benchmark.
• Misalignment monitoring of chain-of-thought and actions, with the ability to stop execution.
• Sealed, isolated sandboxes for high-risk training and evaluations.

Argon Inside Google

Thousands of Googlers already use Argon. Google shared 4 internal results:

• Argon agents applied memory optimizations across data centers, freeing over 300 TiB, with 500 TiB to 1 PiB projected.
• Agents replaced 32K lines of SIMD code in the libgav1 Rust port. The decoder runs 2.7x faster with identical output.
• Agents are migrating C/C++ codebases to Rust, up to 800K+ lines in the Fuchsia Zircon kernel.
• Argon beat a published quantum algorithm baseline by 40% in minutes.

Comparison: Gemini 4 Argon vs Closest Competitors

Feature	Gemini 4 Argon	Claude Opus 5.5	Claude Fable 5.1	GPT-6 Astra
Developer	Google DeepMind	Anthropic	Anthropic	OpenAI
Availability	Fairwind Program only	Claude API and clouds	Claude API and clouds	OpenAI API
Max output per response	1M tokens	128K	128K	128K
Context window	Not disclosed	1M	1M	1.05M
Input / output price (per 1M)	$2 / $10 intro, then $4 / $20	$4 / $20	$10 / $50	$10 / $50
Cached input (per 1M)	$0.10 (intro)	$0.20	$0.25	$1.00
Open weights	No	No	No	No
DeepSWE v1.1	77.9%	74.2%	67.4%	74.1%
Vals Index	68.9%	67.0%	65.8%	63.1%
FrontierSWE v2	55.0%	62.3%	56.3%	65.5%
Terminal-Bench 4.0	57.4%	66.4%	57.9%	58.2%
CWE-bench v1	68% (tie)	67%	58%	68% (tie)

Sources: Google, Anthropic Opus pricing, Anthropic Fable 5.1 docs, OpenAI GPT-6 Astra docs, OpenRouter. Benchmark scores are from Google’s published comparison. GPT-6 Astra prices are its short-context tier.

Key Takeaways

• Gemini 4 Argon raises the output limit from 64K to 1M tokens.
• It leads DeepSWE v1.1 (77.9%) and the Vals Index (68.9%).
• It trails on FrontierSWE v2, Terminal-Bench 4.0 and OSWorld-2.0.
• Introductory pricing of $2 / $10 is half of Claude Opus 5.5.
• Access is limited to Fairwind cyber defenders; no public release date yet.

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