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
1,050,000 tokens
Knowledge Cutoff
February 16, 2026
Key Features
1M 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 roughly half the price ($2/$12 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 roughly half the price ($2/$12 per 1M tokens), tuned for customer support, internal tools, and document analysis; generally available since July 9, 2026
Technical Specifications
Key Features
Capabilities
Other OpenAI Models
Explore more models from OpenAI
GPT-6.1 Sol
An upgrade to GPT-6 Sol that nearly matches GPT-6 Astra on agentic coding, computer use, and professional work at one-fifth of Astra's token prices
GPT-6 Sol
The GPT-6 workhorse for complex coding and agentic workflows — Astra-level reliability at a fraction of Astra's price
GPT-6 Luna
OpenAI's most efficient model for focused, high-volume tasks — summarizing documents, extracting information, and answering quick questions
