Grok 4.1 Fast (reasoning)

xai/grok-4-1-fast-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	10	394.93	$0.009221	$0.00002335	rating point	2025-11-19
Reason	ProofBench	15	0.04	$0.096578	$2.414	correct answer	2025-11-19

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