Published temperature claims for Valar's HTGR differ. TechCrunch (Feb 2025) reported up to 900 C; Valar's own August 2025 post claims operating temperatures above 750 C; Contrary Research (Nov 2025) says in excess of 950 C. None of these sources gives a measured Ward 250 outlet temperature, and the Ward 250 test reactor runs at about 100 kWt (per Taylor). The figures are design targets or characterizations, not demonstrated operating data. The high temperature matters because the company's hydrogen plan relies on the sulfur-iodine cycle, whose hottest step needs roughly 800-1000 C per the Contrary report. An investor, Initialized Capital (February 2025), went further and wrote that Ward One 'operates at 900°C', although Ward One had not been built (orig-064).

• Valar Atomics comes out of stealth with $19M and a pilot reactor site (TechCrunch, 2025-02-20) news “reach temperatures up to 900°C”
• Valar Atomics Selected for the President’s Accelerated Nuclear Program (Valar Atomics, 2025-08-12) primary company “Operating temperatures above 750°C”
• Report: Valar Atomics Business Breakdown & Founding Story (Contrary Research, 2025-11-11) analysis
• Initialized Backs Valar Atomics to Build Nuclear Gigasites (investor's blog) (Initialized Capital, 2025-02-19) analysis “Their Ward One reactor operates at 900°C”