Question 1

Google AI Ultra $200 (Antigravity) vs X Ultra + Build for coding: which gives more building hours per dollar?

Accepted Answer

At p50 peak, Google AI Ultra $200 (Antigravity) returns 0.23 building h/week per $/month (45 h/week for $200/mo) and X Ultra + Build returns 0.18 building h/week per $/month (36 h/week for $200/mo), so Google AI Ultra $200 (Antigravity) gives more building hours per dollar; X Ultra + Build runs a benchmark-measured model for building (56.0/100 quality), the other does not; Google AI Ultra $200 (Antigravity) hours are guessed — treat them as a guess; X Ultra + Build hours are guessed — treat them as a guess.

Question 2

What do Google AI Ultra $200 (Antigravity) and X Ultra + Build cost?

Accepted Answer

$200/mo and $200/mo. Comparisons only pair plans within 1.5× of each other on price.

Question 3

Can Google AI Ultra $200 (Antigravity) and X Ultra + Build run as terminal CLI agents?

Accepted Answer

Google AI Ultra $200 (Antigravity) runs as a CLI agent. X Ultra + Build runs as a CLI agent. The stack builder can require at least one CLI seat.

	Google AI Ultra $200 (Antigravity)	X Ultra + Build
Price	$200/mo	$200/mo
Building h/week p50 (p10–p90), peak	45 (18–90)	36 (14–60)
Building h/week p50 (p10–p90), off-peak	—	—
Building h/week per $/mo at p50 peak	0.23	0.18
Benchmark quality /100s	not measured planning · not measured building · not measured admin	Grok 4.7 (xhigh) · Grok Build · 56/100 planning · Grok 4.7 (xhigh) · Grok Build · 56/100 building · Grok 4.7 (xhigh) · Grok Build · 56/100 admin
Source	guessed	guessed
Terminal CLI agent	Yes	Yes
Clock	limits refresh every 5h, weekly cap; no off-peak rate	shared weekly pool, no off-peak rate

Google AI Ultra $200 (Antigravity) vs X Ultra + Build, side by side