A Tesla hacker revealed Tesla has been working on a new Model Y with a 6-seat configuration. The hacker, Green, is known to often reveal upcoming features by reviewing new Tesla software updates.

Green combed through a recent software update and commented:
The much rumored about 6-seater Model Y made an appearance in the firmware.
Unlikely to be China-only as some of the speculations said.

Some weird "slow down to save energy, people typically drive this much slower here to save %%" nav suggestions.

Rumors of a 6-seat configuration exclusively for China have circulated in the past. These rumors also referenced a longer wheelbase.