Compare AI Models

Comparing the specifications and intelligence benchmarks for Grok 4.20 Beta 0309 (Non-reasoning), Grok 4 Fast (Reasoning).

Model	Intelligence	MMLU Pro	Context	GPQA	TTFT (s)	Speed (T/s)	Input Price (1M)	Output Price (1M)
Grok 4.20 Beta 0309 (Non-reasoning)New xAI	29.7	-	-	78.5%	0.35	257	$2.00	$6.00
Grok 4 Fast (Reasoning) xAI	35.1	85.0%	-	84.7%	3.09	179	$0.20	$0.50

Grok 4.20 Beta 0309 (Non-reasoning) vs Grok 4 Fast (Reasoning) Comparison 2026: Pricing & Benchmarks