Compare AI Models
Comparing the specifications and intelligence benchmarks for Grok 4 Fast (Reasoning).
Model
Intelligence
MMLU Pro
Context
GPQA
TTFT (s)
Speed (T/s)
Input Price (1M)
Output Price (1M)
Grok 4 Fast (Reasoning)
xAI
35.1
85.0%
-
84.7%
3.06
162
$0.20
$0.50
Grok 4 Fast (Reasoning) Comparison 2026: Pricing & Benchmarks