grok-4.20-0309-reasoning vs gpt-5.4-nano-2026-03-17
Pricing, Performance & Features Comparison
Reasoning variant of grok-4.20, positioned by xAI on low hallucination rate and instruction following.
Input$1.3
Output$2.5
Latency (p50)4.7s
Output Limit–
Function Calling
JSON Mode
-
InputText, Image
OutputText
in$1.3out$2.5cache$0.2–
Latency (24h)
Success Rate (24h)
Input$0.2
Output$1.3
Latency (p50)4.8s
Output Limit128K
Function Calling
JSON Mode
-
InputText, Image
OutputText
in$0.2out$1.3cache$0.02–