GPT-5.6 Terra
Overview
GPT-5.6 Terra is the balanced model in the GPT-5.6 series, delivering solid performance for coding, reasoning, and analysis at a mid-range price point. It accepts text and image inputs and offers a 1.05M-token context window.
Key Features
- Balanced Performance: Trades off quality and cost well for most production scenarios
- Long Context: 1.05M-token context
- Multimodal Input: Supports text and image inputs, and can parse PDF documents
Best Use Cases
- General Coding: Day-to-day development, completion, and review
- Business Applications: Content generation, data processing, and routine reasoning
- High-Volume Calls: Cost-sensitive, high-frequency workloads that still need strong capability
Specifications
| Item | Detail |
|---|---|
| Platform model ID | gpt-5.6-terra |
| Context window | 1,050,000 tokens |
| Input modalities | Text, image, PDF |
| Reasoning / thinking | Supported |
| First released (market) | 2026-07-09 |
| Live pricing | See the model marketplace |
Capabilities and Limitations
| Capability | Description |
|---|---|
| Reasoning | Strong. Covers most coding and analysis tasks |
| Multimodal | Supports text, image, and PDF input (no audio/video) |
| Context Window | 1,050,000 tokens |
| Speed | Fast. Balanced-tier positioning |
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