grok-4-fast-non-reasoning vs claude-sonnet-4-5-20250929
Pricing, Performance & Features Comparison
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
Latency (24h)
Success Rate (24h)
Our best model for complex agents and coding, with the highest intelligence across most tasks.
Input$3
Output$15
Latency (p50)3.2s
Output Limit64K
Function Calling
JSON Mode
-
Input–
Output–
in$3out$15cache$0.3write$3.8