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++…”
“Completely trained from scratch new models will be released by @SpaceX every month this year.”
— Elon Musk · Jun 28, 2026 · Elon Musk on X (@elonmusk), June 28 2026 ↗
See his original post on XLoads Elon's actual tweet, right here.
Show ▾
What actually happened
Fetched Sep 24 2026: xAI newsroom latest public model is Grok 4.7 (Sep 21), a new larger base vs Grok 4.6 (Aug 12). That is one from-scratch-class release in September, not a monthly cadence of completely-from-scratch models through year-end. Grok 4.8 remains unreleased (docs.x.ai has no grok-4.8 id). Deadline Dec 31 2026. Status stays pending. x.ai/news fetched Sep 24 2026 — Grok 4.7 shipped Sep 21; no monthly from-scratch cadence yet ↗
The Progression
Jun 28, 2026
The promise: “Completely trained from scratch new models will be released by @SpaceX every month this year.” · Elon Musk on X (@elonmusk), June 28 2026 ↗
Today · Sep 27, 2026
Status: Pending · 95 days left. Still waiting.
On June 28, 2026, while announcing that Grok 4.5 had entered private beta at SpaceX and Tesla, Musk said completely-from-scratch new AI models would be released every month for the rest of the year. The claim sets an aggressive monthly cadence of ground-up model training that far outpaces typical industry release schedules, where frontier labs usually ship a new foundation model once or twice a year. It is falsifiable at year-end: it holds only if a genuinely from-scratch-trained model ships in each remaining month of 2026.
Receipts
LAST CHECKED 2026-09-24xAI’s record
Delivered
11
79% of resolved claims delivered.
Missed
3
Deadline passed, still no-show.
Read next
Also xAI, resolves soonest
PendingAlso xAI, resolves soonest
PendingColossus +220k GB300 fully operational next week
“Another 220k GB300 will be fully operational next week and another 220k in November. If we get lucky, yet a…”
Also xAI, resolves soonest
PendingGrok makes a watchable movie by end of 2026
“Grok will make a movie that is at least watchable before the end of next year and really good movies in 2027.”
← Phones supporting Starlink's new spectrum ship in ~2 years
Starlink comes to American Airlines by 2027 →
/// The Daily Verdict
Know the moment a prediction lands — or doesn't.
One email a day, only when something changes: a new promise, a blown deadline, a goalpost move, or a rare on-time delivery. No spam, instant unsubscribe.
Discussion