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++…”
“Another 220k GB300 will be fully operational next week and another 220k in November. If we get lucky, yet another 220k GB300 by late December.”
— Elon Musk · Sep 24, 2026 · @elonmusk on X, Sep 24 2026 ~10:44 PM CT ↗
See his original post on XLoads Elon's actual tweet, right here.
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The fine print
Said Sep 25 2026 03:44 UTC / Sep 24 10:44 PM CT (oEmbed author Elon Musk + fxtwitter author elonmusk; verbatim display text after @minchoi). Reply to @minchoi (2103211401393091061). Full tweet also states Colossus 1 inventory (150k H100 / 50k H200 / 30k GB200) and Colossus 2 (110k GB200 + 440k GB300) as present-tense inventory — not graded. Primary falsifiable claim: another 220k GB300 fully operational next week. date_made 2026-09-24 CT; "next week" → outer bound end of week Sep 28–Oct 4 → deadline 2026-10-04. Same tweet schedules +220k in November (firm) and +220k by late December (hedged "if we get lucky") — noted here, not separate cards this scout. check_duplicate.py NOVEL. Late-evening CEO scout 2026-09-24.
The Progression
Sep 24, 2026
The promise: “Another 220k GB300 will be fully operational next week and another 220k in November. If we get lucky, yet another 220k GB300 by late December.” · @elonmusk on X, Sep 24 2026 ~10:44 PM CT ↗
Today · Sep 25, 2026
Status: Pending · 9 days left. Still waiting.
On September 24, 2026, Elon Musk said another 220k NVIDIA GB300 GPUs would be fully operational at xAI's Colossus cluster next week, with further 220k tranches in November and (if lucky) late December — a near-term Memphis compute buildout schedule.
Receipts
LAST CHECKED 2026-09-24xAI’s record
Delivered
11
79% of resolved claims delivered.
Missed
3
Deadline passed, still no-show.
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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.”
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PendingGreat AI-generated game released by end of 2026
“The XAI game studio will release a great AI-generated game before the end of next year”
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