ModelsGrok 4.1 Fast
Grok 4.1 Fast
by xAI
Premium
Complex reasoning, large context, state-of-the-art performance
Pricing
Input
$0.20
per 1M tokens
Output
$0.50
per 1M tokens
Cached
N/A
per 1M tokens
Note: Released Nov 2025. xAI's best tool-calling model. Dual modes: low-latency non-reasoning and high-capacity reasoning. Exceptional for customer support, finance, and agentic workflows. 4.22% hallucination rate.
Context & Output
Context Window2M tokens
Max Output32K tokens
Latency
Very Fast
Capabilities
Multimodal
Streaming
Function Calling
Prompt Caching
Key Strengths
What makes this model stand out
Best tool-calling model
Agentic tasks specialist
2M context window
65% hallucination reduction
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