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.

Try Now

Capabilities

Tool Use

Extended Thinking

Image Input

Example Use Cases

Agentic workflow needing reasoning

Need huge context with thinking

Intelligent agent with tool orchestration

Technical Specifications

Context Window

2,000,000 tokens

Max Output

30,000 tokens

Input Cost

$0.20 per 1M tokens

Output Cost

$0.50 per 1M tokens

Cache Read Cost

$0.05 per 1M tokens

Web Search Cost

$15 per 1K calls

Code Execution Cost

$0.19 per 1K calls

Availability

No account required

$0 per month

Also available in these plans

Free
Free
Plus
$20/mo
Pro
$100/mo
Super
$200/mo