Syntherion currently tracks 26 OpenAI models including GPT-4.1, GPT-4.1 Mini, GPT-4.1 Nano, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna, and more.
GPT-4.1 is the default OpenAI model in Syntherion.
GPT-5 Nano currently has the lowest listed input price at $0.05/1M tokens.
GPT-5.6 Sol currently has the largest listed context window at 1.05M tokens.
All OpenAI models in Syntherion support tool use and function calling, allowing agents to invoke external APIs, query databases, and run custom actions.