OpenAI models

Sim currently tracks 32 OpenAI models including GPT-6 Astra, GPT-6.1 Sol, GPT-6 Sol, GPT-6 Luna, GPT-4.1, GPT-4.1 Mini, and more.

GPT-4.1 is the default OpenAI model in Sim.

GPT-5 Nano currently has the lowest listed input price at $0.05/1M tokens.

GPT-6 Astra currently has the largest listed context window at 1.05M tokens.

All OpenAI models in Sim support tool use and function calling, allowing agents to invoke external APIs, query databases, and run custom actions.