xAI is evaluating a unified four-tier subscription structure for Grok and X that would keep advanced Grok Bot agent capabilities—such as task execution beyond basic chat—behind paid plans like the proposed $100 Ultra tier, while the free option carries stricter usage limits. This follows earlier 2026 expansions that added limited free access to models like Grok 4.5 and Grok Bot trials for select paid subscribers. High compute costs and the need for sustainable monetization drive the approach, mirroring patterns at other AI labs where full agentic features remain premium. Traders are watching for any official announcement on rollout timelines or feature thresholds that could shift access before key deadlines.