Grok 4.1 Fast Reasoning

by xAI · chat

Reasoning-enabled variant of Grok 4.1 Fast, xAI's best agentic tool-calling model with 2M context window. Excels at complex real-world use cases with halved hallucination rates compared to Grok 4 Fast.

Pricing

Input: $0.19/M tokens · Output: $0.475/M tokens

Capabilities

Vision, Function Calling, JSON Mode, Streaming, Reasoning

Context: 2000K tokens

Max output: 30K tokens

Routes: 1/1 healthy

Performance

TTFT: 5222ms · Latency: 5722ms · Throughput: 782.6 tok/s