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Attribute GPT-5.6 Sol OpenAI
Summary OpenAI’s highest-capability GPT-5.6 model for difficult professional, analytical, and coding work.
Best for Complex coding, deep analysis, long documents, autonomous agents
Watch out for Highest cost in the GPT-5.6 family; may be slower than smaller tiers.
Family GPT-5.6
Type Reasoning LLM
Status GA
Released 2026-07-09
Context window 1.1M
Max output 128K
Inputs Text, image
Outputs Text
Reasoning Yes — configurable
Tool calling Yes
Structured output Yes
API available Yes
Open weights No
Self-hostable No
License Proprietary
Price $5 input / $30 output per 1M tokens