PendingMassive Grok gains in ~3 months from C/C++ stack rewrite
“Truly massive gains will come in ~3 months when the entire training and inference stack is written in C/C++…”
“Grok 4.7 comes out in 10 days”
— Elon Musk · Sep 1, 2026 · @elonmusk on X, Sep 1 2026 evening CT ↗
See his original post on XLoads Elon's actual tweet, right here.
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The fine print
Said Sep 1 2026 02:59 UTC Sep 2 / 9:59 PM CT Sep 1 (oEmbed author Elon Musk; fxtwitter full text matches). Quote-tweet of @tobi praising Grok 4.6. Distinct from #239 (Grok 4.6 in a week, delivered-late). Same pattern: relative release window from tweet date. Any public release to any user tier = delivered per L13. Watch x.ai/news, docs.x.ai, @xAI.
The Progression
Sep 1, 2026
The promise: “Grok 4.7 comes out in 10 days” · @elonmusk on X, Sep 1 2026 evening CT ↗
Today · Sep 1, 2026
Status: Pending · 10 days left. Still waiting.
On the evening of September 1 2026, Elon Musk quote-tweeted Shopify CEO Tobi Lutke praising Grok 4.6 and wrote that Grok 4.7 comes out in 10 days. That dates the public release promise to about September 11 2026. It is a near-term xAI model ship date, separate from earlier Grok 4.6 and Grok 5 cards.
Receipts
LAST CHECKED 2026-09-01xAI’s record
Delivered
10
83% of resolved claims delivered.
Missed
2
Deadline passed, still no-show.
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