GPT-5.1 (High)

by OpenAI · chat

GPT-5.1 (High) by OpenAI — Access via Apertis API. Input: $0.0004/1M tokens, Output: $0.0030/1M tokens. Context: 400K tokens. OpenAI-compatible API with 50% cost savings.

Pricing

Input	Output	Context Window
$0.0004 / 1M tokens	$0.0030 / 1M tokens	400K tokens

Quick Start

Use the Apertis API (OpenAI-compatible) to access GPT-5.1 (High):

curl https://api.apertis.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "gpt-5.1-high", "messages": [{"role": "user", "content": "Hello!"}]}'

Features

• OpenAI-compatible API — drop-in replacement
• Streaming support
• Function calling / Tool use
• Free cache reads — save on repeated prompts