MODEL SIGNAL · OPENAI
GPT-5.6 Sol
GPT-5.6 Sol is OpenAI's flagship multimodal model in the 5.6 series, optimized for complex reasoning, multi-step coding, and agentic workflows.
CATEGORYMultimodal
CONTEXT1000000
RELEASEDJuly 9, 2026
Key Features
- 1-million token context window
- Flagship capability tier of the GPT-5.6 family
- Optimized for multi-step agentic workflows and command-line coding tasks
Read the Model Signal report →
The designed Model Signal report for GPT-5.6 Sol is still in review. It will publish here after the fact and quality gates clear.