Those robots were designed 20 years ago... You can send now a whole swarm of humanoid robots, that would recharge 24x7 out of a KRUSTY Reactor [1], you did not even had LLMs then.
[1] - https://ntrs.nasa.gov/api/citations/20205009350/downloads/03...
[1] - https://ntrs.nasa.gov/api/citations/20205009350/downloads/03...
I'll make an educated guess that, as of this moment, there are zero functioning swarms of humanoid robots recharging on such a reactor on Earth.
Once we add radiation shielding, software and hardware reliability, landing (marsing?) it all safely and deploying it (among others) I wouldn't be surprised if the earliest arrival time is, unsurprisingly, 20 years in the future.