Grok 4.1 Fast Reasoning

xAI

xAI's intelligent agent combining massive context, thinking capabilities, and tool mastery. With a 2M context window and reasoning mode, this model thoughtfully navigates complex agentic workflows while maintaining speed. The perfect balance between rapid execution and intelligent decision-making for sophisticated real-world applications. Excels at scenarios requiring both tool orchestration and reasoning?like nuanced customer support, complex financial analysis, and adaptive workflows. Choose this when your agents need to think and act intelligently.

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Capabilities

Thinking

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Outdated model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 Reasoning