OpenAIPaidOperational

GPT-5.3 Codex Xhigh

API model name: gpt-5.3-codex-xhigh

GPT-5.3 Codex Xhigh is OpenAI's chat model, served on the Api.Airforce unified API. Capabilities include Reasoning. It is priced at $1.75 per million input tokens and $14.00 per million output tokens. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

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Pricing

Input / 1M tokens

$1.75

Output / 1M tokens

$14.00

Cache read / 1M tokens

$4.31

Official input rate

$1.75

Official output rate

$14.00

Api.Airforce price vs. the provider's official rate.

Specifications

Provider: OpenAI
Type: chat model

Capabilities

Reasoning

What is GPT-5.3 Codex Xhigh used for?

Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.
Complex reasoning — math, coding and step-by-step problem solving.

GPT-5.3 Codex Xhigh vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
GPT-5.3 Codex Xhigh	—	—	$1.75	$14.00
Babbage 002	—	—	$0.34	$0.34
ChatGPT-4o Latest	—	—	$2.75	$14.50
Codex Auto Review	—	—	$0.09	$0.56

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

Related models

Babbage 002OpenAI · $0.34 / 1M ChatGPT-4o LatestOpenAI · $2.75 / 1M ChatGPT Image LatestOpenAI · $5.25 / 1M Codex Auto ReviewOpenAI · $0.09 / 1M Codex MiniOpenAI · $1.95 / 1M DALL·E 2OpenAI · $36.60 / 1M Davinci 002OpenAI · $2.00 / 1M GPT-3.5OpenAI · $1.11 / 1M GPT-3.5 TurboOpenAI · $0.66 / 1M GPT-3.5 TurboOpenAI · $0.59 / 1M GPT-3.5 TurboOpenAI · $0.50 / 1M GPT-3.5 Turbo 16KOpenAI · $3.00 / 1M

GPT-5.3 Codex Xhigh — frequently asked questions

How much does GPT-5.3 Codex Xhigh cost?: GPT-5.3 Codex Xhigh is billed pay-as-you-go at $1.75 per 1M input tokens and $14.00 per 1M output tokens. There is no subscription — you only pay for what you use.
What can GPT-5.3 Codex Xhigh do?: GPT-5.3 Codex Xhigh supports Reasoning.
Is GPT-5.3 Codex Xhigh free to use?: GPT-5.3 Codex Xhigh is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use GPT-5.3 Codex Xhigh via the API?: GPT-5.3 Codex Xhigh is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID gpt-5.3-codex-xhigh with your Api.Airforce API key.
Who makes GPT-5.3 Codex Xhigh?: GPT-5.3 Codex Xhigh is OpenAI's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use GPT-5.3 Codex Xhigh via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass gpt-5.3-codex-xhigh as the model.

cURL

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

Python

from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
    model="gpt-5.3-codex-xhigh",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
  model: "gpt-5.3-codex-xhigh",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);