GPT-5 System Card
OpenAI Blog
OpenAI documented a GPT-5 system that routes requests across multiple model variants optimized for different computational demands. The system includes gpt-5-main, gpt-5-thinking, and gpt-5-thinking-nano versions designed to handle varying task complexity. Developers can now select appropriate model sizes based on their performance requirements and cost constraints rather than using a single model for all tasks.
Why it matters
This GPT-5 system card explains how a unified model routing system powers fast and smart responses using gpt-5-main, gpt-5-thinking, and lightweight versions like gpt-5-thinking-nano, optimized for different tasks and developer use.