Google unveiled Gemini 4 Argon on Wednesday as its most capable model for coding, office work and cyber defense. Argon recorded a 0.7% attack success rate on Gray Swan's indirect prompt-injection benchmark, lower than the other models listed. Google is giving vetted defenders access through its Fairwind Program without cyber guardrails before expanding access to paid API customers and Google AI Ultra subscribers. Google says the phased rollout is necessary because Argon's cyber capabilities could also help attackers.