GPT-5.6 Sol
Overview
GPT-5.6 Sol is the flagship reasoning model in OpenAI’s GPT-5.6 series, built for complex professional work with strong results in coding, analysis, and multi-step planning. It accepts text and image inputs and offers a 1.05M-token context window.
Key Features
- Deep Reasoning: Strong reasoning for complex professional tasks
- Long Context: 1.05M-token context, suited to long documents and large codebases
- Multimodal Input: Supports text and image inputs, and can parse PDF documents
Best Use Cases
- Complex Coding: Large-codebase understanding, refactoring, and multi-file changes
- Deep Analysis: Research, data analysis, and multi-step reasoning tasks
- Professional Planning: Tasks that require decomposing and chaining multiple steps
Specifications
| Item | Detail |
|---|---|
| Platform model ID | gpt-5.6-sol |
| 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 | Extremely strong. Suited to the most complex reasoning and coding tasks |
| Multimodal | Supports text, image, and PDF input (no audio/video) |
| Context Window | 1,050,000 tokens |
| Speed | Moderate. As a reasoning model, it is slower during deep thinking |
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