Elon Musk's xAI has released the Grok 4.1 Fast AI model with a 2-million-token context window. The new model has been designed for enterprise use cases, including customer support, finance, and deep, long, multi-turn scenarios. The new Grok model is available in two variants; Grok 4.1 Fast Reasoning, offering maximum intelligence and planning, and Grok 4.1 Fast Non-Reasoning for near-instant responses. Elon Musk said, "Grok 4.1 Fast has just been released with our new Agent Tools API that has direct access to 𝕏 data, web browsing, and code execution." xAI said that the model combined frontier tool-calling performance with blazing-fast inference and cost-effectiveness.

Grok 4.1 Fast Launched by xAI

Elon Musk Reacts to xAI's New Model Grok 4.1 Fast 

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