Grok 4.1 Fast

xAI

xAI's speed demon for agentic workflows requiring rapid, accurate tool execution. With an extraordinary 2M context window, this model processes massive amounts of information while maintaining blazing-fast response times. Optimized specifically for tool calling and task completion, it excels at real-world applications like customer support, financial analysis, and automated workflows where speed is critical. The non-reasoning variant prioritizes quick responses over extended thought processes. Choose this when you need rapid, reliable agent performance at incredible value.

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Capabilities

Tool Use

Image Input

Image Generation

Technical Specifications

Context Window

2,000,000 tokens

Max Output

30,000 tokens

Pricing

Token Costs (per 1M tokens)

Cache Miss Input

$0.20

Non-Reasoning Output

$0.50

Cache Read Input

$0.05

Tool Costs (per 1K calls)

Web Search

$5

Code Execution

$5

Image Generation

$70

Legacy

Made legacy on

Reason

Outdated model

Recommended Replacement

Grok 4.20