I searched but couldn't find any mention of it. Antigate now supports this annoying CAPTCHA, I can't see any of these in my Antigate account so I don't know if it's supported or not?
We now support new Goolge No-Captcha 4x4 (select all squares with
something). Send parameter "type” with value “recaptcha2_44” and our
workers will see it in appropriate interface.
We’ve also made a special settings page - Recaptcha Tuning,
for those who send recaptchas without any parameters, as simple
captchas. This setting overrides API requirements and lets your
recaptchas to be processed normally.
. Added support for 2x4 captcha. Send parameter type=recaptcha2_24 for such captchas.