GPT-5.3-Codex (High)

by OpenAI · chat

GPT-5.3-Codex (High) by OpenAI — Access via Apertis API. Input: $0.0006/1M tokens, Output: $0.0044/1M tokens. Context: 399K tokens. OpenAI-compatible API with 50% cost savings.

Pricing

InputOutputContext Window
$0.0006 / 1M tokens$0.0044 / 1M tokens399K tokens

Quick Start

Use the Apertis API (OpenAI-compatible) to access GPT-5.3-Codex (High):

curl https://api.apertis.ai/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "gpt-5.3-codex-high", "messages": [{"role": "user", "content": "Hello!"}]}'

Features