GPT-5.6 Terra is the best-balanced model, offering an excellent mix of performance, speed, and cost. It delivers performance close to GPT-5.5 while being significantly more efficient, making it ideal for everyday work such as writing, coding, translation, brainstorming, and data analysis. For most users, Terra provides the best overall experience without sacrificing quality, making it the recommended default model.
API|VisionReasoningWeb Search|Proprietary Model
Release Date
2026-07-09Knowledge Cutoff 2026-02-16
The date this AI was released. The knowledge cutoff is the last point covered by its training data — usually several months before release — so the model may not know events after that point.
Input → Output Format
The types of content this AI can receive, and what it can produce in return.
Context Memory
1.1MIN128KOUT
The maximum amount of text the AI can read and process in a single request. A larger number means it can handle longer documents or conversations.
Cost/1M Words
$2IN$12OUT
The cost of using this AI directly in your own application. Shown in USD per 1 million units of text (tokens).