Gemini 4 Argon, defenders first
On 30 September 2026 Google announced Gemini 4 Argon, its new frontier model, and began rolling it out only to a set of trusted cyber defenders through its Fairwind Program. Google says wider release to developers, enterprises and consumers will follow, starting with paid API customers and Google AI Ultra subscribers, but gives no date; it also says it is taking part in the US government's voluntary pre-release model access process.
Why it matters
A second laboratory staging its newest model by audience instead of releasing it to everyone: defenders first, with the cyber restrictions lifted for them, the rest after further work on safeguards. The earlier case in the atlas is Anthropic's Mythos line.
What Google's post says. Argon is 'built to sustain deep reasoning across complex, long-horizon workflows'. The introductory price is $2 and $10 per million input and output tokens, cached input tokens 95% cheaper; the output limit is raised to 1M tokens from 64K. For trusted defenders and Google's internal teams the model is released without cyber guardrails; Wiz uses it in its Scan for Good initiative and, Google says, found a critical vulnerability in healthcare software that earlier frontier models missed. Google's figures. DeepSWE v1.1 77.9% ('state of the art'); AutomationBench (Zapier's benchmark) 51.3%, rank 1; LVBench 91.7%; CWE-bench v1 68%, tied first; first on the Vals Index. Internal examples: a quantum subroutine optimised 40% better than the published baseline; memory optimisations that will free over 300 TiB; a Rust port of the libgav1 decoder 2.7 times faster than the earlier port; C/C++ to Rust migrations of up to 800K+ lines in the Fuchsia Zircon kernel, which are under audit and testing. Safeguards before broad release. Monitoring of internal activations against misuse, robustness against indirect prompt injection (first on Gray Swan's IPI benchmark), monitoring of chain-of-thought and actions with the ability to halt execution, hardened isolated sandboxes. What the record does not claim. All figures are Google's own; no independent evaluation was read. The post gives no date for the wider release. The Gemini API release notes, read on 10 October 2026, have no entry for Argon, so the record does not say the model is publicly available. The Fairwind partner list and quotations were not in the page text.