PendingGrok 4.7 needs a few more days (by Sep 16, 2026)
“Grok 4.7 comes out in 10 days”
goalposts: 2026-09-11 (in 10 days) → 2026-09-16 (a few more days) · moved 1×
“Grok 4.8, which is a 2.5T model trained with our new C++ software stack, will finish training this week and start RL”
— Elon Musk · Sep 13, 2026 · @elonmusk on X, Sep 13 2026 evening CT ↗
See his original post on XLoads Elon's actual tweet, right here.
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The fine print
Said Sep 13 2026 01:24 UTC Sep 14 / 8:24 PM CT Sep 13 (oEmbed author Elon Musk; fxtwitter full text matches). Reply to @techdevnotes. Falsifiable near-term claim: Grok 4.8 training finishes this week, then RL starts. L10: evening Sunday 'this week' → generous end of week 2026-09-20. Distinct from #259 (Grok 4.7 public release by Sep 16) — this is a 4.8 training-complete milestone, not a 4.7 ship date. check_duplicate.py: NOVEL.
The Progression
Sep 13, 2026
The promise: “Grok 4.8, which is a 2.5T model trained with our new C++ software stack, will finish training this week and start RL” · @elonmusk on X, Sep 13 2026 evening CT ↗
Today · Sep 13, 2026
Status: Pending · 7 days left. Still waiting.
On the evening of September 13 2026, Elon Musk replied that Grok 4.8 — a 2.5T model on xAI's new C++ software stack — will finish training this week and start reinforcement learning. That dates a near-term Grok 4.8 training-complete milestone to about September 20 2026, separate from the Grok 4.7 release card.
Receipts
LAST CHECKED 2026-09-13xAI’s record
Delivered
10
83% of resolved claims delivered.
Missed
2
Deadline passed, still no-show.
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