Grok API text responses carry an invisible watermark by default from Nov 7
As of Nov 7, text from grok-4.7, 4.6, 4.5, 4.3, and the grok-4.20 variants is watermarked by default for EU AI Act compliance—no request changes, quality/speed unchanged. Check the x-watermark response header; team admins can opt out per model in the SpaceXSI Console.