Frontier models

GPT-5.6 Sol, Terra, and Luna cover frontier, balanced, and efficient workloads; choose a Claude Code model when your workflow needs the Claude CLI route.

5.6 sol

gpt-5.6-sol

Frontier

Highest-capability GPT-5.6 model for demanding work.

Model ID
Reasoning
lowmediumhighxhighmaxultra
Input125 cr / per 1M tokens
Output750 cr / per 1M tokens
SpeedMedium
5.6 terra

gpt-5.6-terra

Balanced

Balanced GPT-5.6 intelligence and credit efficiency.

Model ID
Reasoning
lowmediumhighxhighmaxultra
Input62.5 cr / per 1M tokens
Output375 cr / per 1M tokens
SpeedFast
5.6 luna

gpt-5.6-luna

Fast

Fast, efficient GPT-5.6 model for everyday production.

Model ID
Reasoning
lowmediumhighxhighmax
Input25 cr / per 1M tokens
Output150 cr / per 1M tokens
SpeedFaster