GPT-5.6 Terra
The balanced mid-tier of the GPT-5.6 family — matches GPT-5.5 quality on high-volume business tasks at roughly half the price
GPT-5.6 Terra
OpenAI • June 2026
Training Data
Not disclosed
GPT-5.6 Terra
June 2026
Parameters
Not disclosed
Training Method
Token-Efficient Unified Architecture
Context Window
1,500,000 tokens
Knowledge Cutoff
Not disclosed
Key Features
1.5M Token Context • ~2x Cheaper than GPT-5.5 • High-Volume Tasks • Balanced Cost/Quality
Capabilities
Professional Tasks: Outstanding
Coding: Exceptional
Cost-Efficiency: Excellent
What's New in This Version
Competitive with GPT-5.5 while ~2x cheaper ($2.50/$15 per 1M tokens), tuned for customer support, internal tools, and document analysis; generally available since July 9, 2026
The balanced mid-tier of the GPT-5.6 family — matches GPT-5.5 quality on high-volume business tasks at roughly half the price
What's New in This Version
Competitive with GPT-5.5 while ~2x cheaper ($2.50/$15 per 1M tokens), tuned for customer support, internal tools, and document analysis; generally available since July 9, 2026
Technical Specifications
Key Features
Capabilities
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