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Grok 4.1 Fast Reasoning

xAI Text

xAI's fast reasoning model. 2M token context window for processing massive documents and codebases.

Web Search X Search

Specifications

ProviderxAI
CategoryText
Context window2M tokens

Pricing (Starter tier)

26.00 credits / 1M input tokens
65.00 credits / 1M output tokens

Higher tiers get volume discounts. See tiers

Quick Start

curl -N https://query.genx.sh/v1/chat/completions \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"grok-4.1-fast-reasoning","messages":[{"role":"user","content":"What are people saying about AI on X today?"}],"tools":[{"type":"web_search"},{"type":"x_search"}],"stream":true}'

Try Grok 4.1 Fast Reasoning on GenX Router

500 free credits on signup. No credit card required.

Get Your API Key API Documentation