xAI: Grok 4 Fast

1.91M Context
0.2/M Input Tokens
0.5/M Output Tokens

X AI
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13 Oct, 2025

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. Read more about the model on xAI’s news post. Reasoning can be enabled using the reasoning enabled parameter in the API. Learn more in our docs

Prompts and completions on Grok 4 Fast Free may be used by xAI or OpenRouter to improve future models.

xAI: Grok 2 Vision 1212

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Grok 2 Vision 1212 通过更强的视觉理解、精细的指令跟随和多语言支持，推动基于图像的 AI 发展。从物体识别到风格分析，它使开发者能够构建更直观、具视觉意识的应用程序。其增强的可操控性和推理能力为下一代图像解决方案奠定了坚实的基础。要了解更多关于该模型的信息，请查看 xAI's announcement. ...

X AI 32K context $2/M input tokens $10/M output tokens $0.004/M image tokens

xAI: Grok 4

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Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not exposed, reasoning ...

X AI 250K context $3/M input tokens $15/M output tokens

xAI: Grok Code Fast 1

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Grok Code Fast 1 is a speedy and economical reasoning model that excels at agentic coding. With reasoning traces visible in the response, developers can steer Grok Code for high-quality work flows. ...

X AI 250K context $0.2/M input tokens $1.5/M output tokens

xAI: Grok 4 Fast

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