GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...
Developer
OpenAI
Release Date
July 9, 2026
Context Window
1,050,000 tokens≈ 1,400 words
API Access
Publicly AvailableIntegrate via official API
Input Cost
$2.50per million tokens
Output Cost
$15.00per million tokens
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