claude-sonnet-4-5-20250929 vs grok-4-fast-reasoning
Pricing, Performance & Features Comparison
Our best model for complex agents and coding, with the highest intelligence across most tasks.
Input$3
Output$15
Latency (p50)6.1s
Output Limit64K
Function Calling
JSON Mode
-
Input–
Output–
in$3out$15cache$0.3write$3.8
Latency (24h)
Success Rate (24h)
xAI latest advancement in cost-efficient reasoning models.
Input$0.2
Output$0.5
Latency (p50)4.7s
Output Limit–
Function Calling
JSON Mode
-
Input–
Output–
in$0.2out$0.5–write$0.05