How much does grok-4.1-fast cost per 1M tokens?

Input is priced at $0.09 per 1M tokens, output at $0.22 per 1M tokens. Billing is per token, no rounding to batch sizes.

How do I access grok-4.1-fast via API?

Send requests to the UnoRouter /v1/chat/completions endpoint with model=grok-4.1-fast. Any OpenAI-compatible client library works. Authentication uses a standard Bearer token.

xAI: grok-4.1-fast

Name: grok-4.1-fast
Brand: xAI

grok-4.1-fast

2M context128K outReasoningToolsVisionFilesStructuredWeb search

Released Nov 1, 2025Knowledge cutoff Nov 2024Updated Oct 5, 2026

A low-latency, high-throughput variant of Grok-4.1 designed for instant responses. It bypasses the thinking token phase to prioritize speed while excelling in creative writing, emotional intelligence (EQ), and agentic tool-calling across a massive 2M context.

Mode chat