Musk commits to a firm ship date for Grok 4.7 — September 12, 2.1T parameters

2026-09-02 · part of Grok

What happened

Elon Musk posted on X that "Grok 4.7 comes out in 10 days," putting a specific calendar date (September 12) on a model whose ship date this map's own dated expectation has tracked only as a moving "3-4 weeks" window since 08-18. He described it as 2.1T parameters (up from Grok 4.6's 1.5T, a ~40% increase), trained in part on SpaceX's own engineering corpus, "better than 4.6 in every way except slightly slower to serve," and predicted it would "surpass all models" — the same hype register the thread's own watch line already flags. This is the first time a specific day, rather than a week-range, has attached to Grok 4.7. (Elon Musk on X, NextBigFuture, BiGGo Finance)

Sources 3

Elon Musk on X x.com generally unreliable
NextBigFuture nextbigfuture.com high 0.854
BiGGo Finance finance.biggo.com unrated

Credibility ratings combine two public datasets: Lin et al. 2023, PNAS Nexus 2(9):pgad286 (CC BY 4.0) for the domain-quality score, and Wikipedia's perennial-sources list (CC BY-SA 4.0) for the reliability tier. A rating describes an outlet's general record, never this particular article. Unrated means absent from those datasets — not a judgement.

The wider story

This event sits inside Grok, which carries how it developed before and since.

Story 11 of 12 in this thread's timeline, oldest to newest

Adjacent threads (shared entities):

· Colossus

· Musk Megacap

· Grok Harm

· Where the Capex Lands

· PIF Bets Out of Concrete, Into Compute