Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning. 继续阅读 about the model on xAI's news post. Reasoning can be enabled using the reasoning enabled parameter in the API. 了解更多 in our docs
Prompts and completions may be used by xAI or OpenRouter to improve future models.
