Alphabet shares fell 2% to $338.85 even as the wider technology sector advanced after Google unveiled Gemini 4 Argon, a frontier AI model designed for extended enterprise work, software development and automated cybersecurity. Google said the model can process up to 1 million tokens in a single trajectory, scan codebases, identify critical vulnerabilities and produce context-aware security patches. During early testing, Argon reportedly found a severe, previously unmapped vulnerability in hospital healthcare software that earlier models had missed, while Google’s internal engineering infrastructure is already using it. The launch is initially limited to trusted cybersecurity specialists through Google’s Fairwind Program; enterprise users, developers and subscribers will follow after further safety safeguards are added. Google has set an introductory developer price of $2 per million input tokens. The restricted access means investors do not yet have evidence of enterprise demand or revenue, helping explain Alphabet’s underperformance against technology benchmarks. XLK rose 1% to $198.25, QQQ gained 0.54% to $743.79, Microsoft rose 0.2% to $514.08 and Amazon declined 0.5% to $247.90. The next test is whether broader access and the developer pricing attract early demand, turning automated vulnerability discovery and patching into paid enterprise work.