Sim currently tracks 14 xAI models including Grok 4.5, Grok 4.3, Grok 4 Latest, Grok 4 0709, Grok 4.1 Fast Reasoning, Grok 4.1 Fast Non Reasoning, and more.
Grok 4.5 is the default xAI model in Sim.
Grok Code Fast 1 currently has the lowest listed input price at $1/1M tokens.
Grok 4.3 currently has the largest listed context window at 1M tokens.
All xAI models in Sim support tool use and function calling, allowing agents to invoke external APIs, query databases, and run custom actions.