grok-4-fast-reasoning vs grok-4-fast-non-reasoning
Pricing, Performance & Features Comparison
xAI latest advancement in cost-efficient reasoning models.
Input$0.2
Output$0.5
Latency (p50)3.5s
Output Limit–
Function Calling
JSON Mode
-
Input–
Output–
in$0.2out$0.5–write$0.05
Latency (24h)
Success Rate (24h)
xAI latest advancement in cost-efficient reasoning models.
Input$0.2
Output$0.5
Latency (p50)1.8s
Output Limit–
Function Calling
JSON Mode
-
Input–
Output–
in$0.2out$0.5–write$0.05