GPT-5.6 Terra Pro
OpenAI
openai/gpt-5.6-terra-proGPT-5.6 Terra Pro is a higher-reasoning-effort version of the balanced Terra tier in OpenAI's GPT-5.6 family, for everyday coding, reasoning, and agentic tasks that need a bit more accuracy.
Cost rate
2x
Context
1.1M
Released
Jul 9, 2026
Input
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Output
Text
Support
ReasoningTool callingStructured outputs