Musk told a podcast that Grok 4.7 would ship 'next week,' but that window passed without a release. Musk instead announced Grok 4.8 on September 13 (2.5T parameters, new C++ stack) and downgraded Grok 4.7 to 'roughly comparable to Anthropic's Opus 5.0' — xAI has still published no model card, price, or release date for 4.7, and attention has moved to 4.8.

UPDATE 2026-09-22: confirmed — Grok 4.7 launched on September 21 for coding and knowledge work, after weeks of delays (see the 2026-09-21 Grok 4.7 released entry). This rumor resolved exactly on schedule.