Grok 4.20 (reasoning)

xai/grok-4.20-0309-reasoning

Every ranked configuration of this model. Rank is dollars per unit of score on that job, and the unit is the job's own — the `per` column names it, because a rating point and a solved task are not the same thing to divide by. Displayed values are rounded; exact values in site.json and the dumps.
job	benchmark	#	score	task $	ratio $	per	released
Code	ALE-Bench	32	1150.28	$0.13838	$0.0001203	rating point	2026-02-17
Reason	ProofBench	14	0.14	$0.31815	$2.272	correct answer	2026-02-17

These are the numbers on #frontier. How a fixed capability's cost falls over time is on /methodology.