Grok 4 Fast

by xAI · chat

Grok 4 Fast by xAI — Access via Apertis API. Input: $0.0001/1M tokens, Output: $0.0002/1M tokens. Context: 2.0M tokens. OpenAI-compatible API with 50% cost savings.

Pricing

InputOutputContext Window
$0.0001 / 1M tokens$0.0002 / 1M tokens2.0M tokens

Quick Start

Use the Apertis API (OpenAI-compatible) to access Grok 4 Fast:

curl https://api.apertis.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "grok-4-fast", "messages": [{"role": "user", "content": "Hello!"}]}'

Features