grok-4.5 vs gpt-5.6-terra
Pricing, Performance & Features Comparison
xAI’s flagship reasoning model with configurable reasoning effort.
Input$2
Output$6
Latency (p50)5.2s
Output Limit–
Function Calling
JSON Mode
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InputText, Image
OutputText
in$2out$6cache$0.5–
Latency (24h)
Success Rate (24h)
Mid tier of the GPT-5.6 family (Terra), balancing frontier reasoning quality against cost.
Input$2.5
Output$15
Latency (p50)4s
Output Limit128K
Function Calling
JSON Mode
-
InputText, Image
OutputText
in$2.5out$15cache$0.25–