xAI: Grok 4.1 Fast

x-ai/grok-4.1-fast

Released Nov 19, 20252,000,000 context

Starting at $0.20/M input tokensStarting at $0.50/M output tokens$5/K web search

Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window.

Reasoning can be enabled/disabled using the reasoning enabled parameter in the API. Learn more in our docs

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xAI: Grok 4.1 Fast

x-ai/grok-4.1-fast

Released Nov 19, 20252,000,000 context

Starting at $0.20/M input tokensStarting at $0.50/M output tokens$5/K web search

Grok 4.1 Fast is xAI's best agentic tool calling model that shines in real-world use cases like customer support and deep research. 2M context window.

Reasoning can be enabled/disabled using the reasoning enabled parameter in the API. Learn more in our docs

Effective Pricing for Grok 4.1 Fast

Actual cost per million tokens across providers over the past hour

xAI: Grok 4.1 Fast – Effective Pricing | OpenRouter