xAI previewed Grok 5 on October 14, 2026, highlighting major gains in context window size for sustained memory across long sessions and faster reasoning speeds, with plans for staged rollout starting with power users before wider availability. The model remains unreleased as of mid-October, following repeated timeline slips from earlier 2026 targets and the recent shipping of interim versions like Grok 4.7 in September. Musk has framed Grok 5 as xAI's potential AGI milestone, supported by rapid Colossus cluster expansion now exceeding one million GPU equivalents. Traders are watching for official release confirmation via xAI channels or API access, alongside competitive pressure from frontier labs and any further compute or benchmark updates that could accelerate or delay full deployment.