How much does GPT-5 Codex cost?

GPT-5 Codex is billed pay-as-you-go at $1.31 per 1M input tokens and $10.50 per 1M output tokens. There is no subscription — you only pay for what you use.

What can GPT-5 Codex do?

GPT-5 Codex supports Reasoning.

Is GPT-5 Codex free to use?

GPT-5 Codex is a paid, pay-as-you-go model — no subscription, you are only charged for usage.

How do I use GPT-5 Codex via the API?

GPT-5 Codex is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID gpt-5-codex with your Api.Airforce API key.

Who makes GPT-5 Codex?

GPT-5 Codex is OpenAI's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

OpenAIPaidOperational

GPT-5 Codex

API model name: gpt-5-codex

GPT-5 Codex is OpenAI's chat model, served on the Api.Airforce unified API. Capabilities include Reasoning. It is priced at $1.31 per million input tokens and $10.50 per million output tokens. That is below the provider's $1.25 official input rate. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

Get an API key View pricing

Pricing

Billed per generation — see the pricing page for current rates.

Specifications

Provider: OpenAI
Type: chat model

Capabilities

Reasoning

Benchmarks

Independent evaluations and measured speed from Artificial Analysis.

Intelligence Index

24.9/100

Math Index

98.7/100

MMLU-Pro87%

GPQA Diamond84%

Humanity's Last Exam28%

LiveCodeBench84%

AIME 202599%

τ²-bench87%

GPT-5 Codex (High)

Source: Benchmark data by Artificial Analysis (artificialanalysis.ai)

What is GPT-5 Codex used for?

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

GPT-5 Codex vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
GPT-5 Codex	24.9	—	—	—
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.

GPT-5 Codex — frequently asked questions

How much does GPT-5 Codex cost?: GPT-5 Codex is billed pay-as-you-go at $1.31 per 1M input tokens and $10.50 per 1M output tokens. There is no subscription — you only pay for what you use.
What can GPT-5 Codex do?: GPT-5 Codex supports Reasoning.
Is GPT-5 Codex free to use?: GPT-5 Codex is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use GPT-5 Codex via the API?: GPT-5 Codex is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID gpt-5-codex with your Api.Airforce API key.
Who makes GPT-5 Codex?: GPT-5 Codex 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 Codex via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass gpt-5-codex 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-codex",
    "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-codex",
    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-codex",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);