gpt-5.6-terra vs gpt-5.6-luna
Pricing, Performance & Features Comparison
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
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InputText, Image
OutputText
in$2.5out$15cache$0.25–
Latency (24h)
Success Rate (24h)
Small tier of the GPT-5.6 family (Luna), the fastest and most cost-efficient GPT-5.6 model.
Input$1
Output$6
Latency (p50)4.1s
Output Limit128K
Function Calling
JSON Mode
-
InputText, Image
OutputText
in$1out$6cache$0.1–