What is Gemini 4 Argon, Google’s new AI model to hunt security bugs?

What is Gemini 4 Argon, Google’s new AI model to hunt security bugs? It centres on Gemini, and also names Google. Reported by The Indian Express. Bharat Hunt files it under AI Models — the section covering a new or updated model, its capabilities, benchmarks or availability.
Written by Bharat Hunt from the headline and the coverage below. The original reporting is the source of truth.