Resources
Source: https://assets.new.siemens.com/siemens/assets/api/uuid:43889f3a-e6b3-4156-aca6-78b1be2cc44a/ANYmal-X-Spec-Sheet.pdf (official ANYbotics spec sheet, hosted by Siemens).
Product page: https://www.anybotics.com/robotics/anymal-x/ — page text says 2026 ANYmal X specifications are coming soon, so these sheet figures may change.
Year 2022: unveiled March 2022 with PETRONAS (https://www.petronas.com/media/media-releases/petronas-partners-anybotics-ag-commercialise-anymal-x). Commercial orders opened 28 Sep 2022 (https://www.anybotics.com/news/anymal-x-commercial-launch-sprint-conference/; https://www.therobotreport.com/anybotics-opens-commercial-order-for-anymal-quadruped/).
Shipping rests on that commercial-sale news, the PETRONAS commercialisation release, and an early-adopter note on the product page. No delivered-unit count is published.
Carry payload and DOF are not on the X sheet. Both are Undisclosed. The 6 kg figure is the inspection pan-tilt unit, not carry payload.