Elon Musk’s November 10, 2026 update on X serves as the main catalyst shaping trader views, confirming Grok 4.8 pre-training completion, entry into reinforcement learning on a newly rewritten C/C++ stack, and a planned soft rollout to Grok Bot users later that week. As of November 13, xAI has not issued an official release or updated its models page, leaving Grok 4.7 (launched September 21 with a 500K context window) as the current flagship. The 2.5-trillion-parameter model is described as fundamentally different from its predecessor, with early evaluation gains noted but full benchmarks and API access still pending. Traders are watching the limited rollout for confirmation signals, alongside Musk’s comments positioning Grok 5 potentially above Opus 5.5 within two to three months.