Software Update Rollout — December 10, 2025

Sony Alpha A1 (ILCE-1)

Main Unit Software Update Version. 4.00

If you are using the Creators' App, you can also update it from the app.

Credit: @kunkoku

Source: https://support.d-imaging.sony.co.jp/www/cscs/firm/?mdl=ILCE-1&lang=jp&area=jp