Truth Check/8 October 2026
“Surface Laptop Ultra: RTX Spark, up to 128 GB unified memory, models "exceeding 120B parameters locally", "up to 1 petaflop" (FP4, sparsity), from $2,599, pre-order 7 Oct, available 16 Oct; Dev Box $5,999 shipping November; Microsoft Execution Containers generally available on Windows 11 on 7 Oct”
The claim as it travelled: Microsoft, 7 Oct 2026.
The claim holds against the page that produced it.
Microsoft's own pages print the price, the dates and the 1 petaflop figure, which its footnote defines as theoretical FP4 with sparsity.
- Checked Against
- blogs.windows.com ↗Primary
- Read the Check
- Microsoft's Surface Laptop Ultra runs models "exceeding 120B parameters" on the laptop for $2,599, as Windows makes its agent sandbox generally available
Microsoft's two pages: NVIDIA RTX Spark with up to 128 GB of unified memory and "up to 1 petaflop" (FP4 with sparsity, says the footnote), pre-orders today and shipping 16 October; the $5,999 Dev Box ships in November; Microsoft Execution Containers "becomes generally available on Windows 11" with Codex, GitHub Copilot and Replit already on it and Claude Code "releasing support"; MAI Code 1.1 Flash runs locally at 3-bit.
Every claim we have checked, in the Ledger.
Every claim checked against the page that produced it.
Three mornings a week, free.