GPT-5.3-Codex API in Australia
OpenAI’s coding specialist from early 2026, made for agents that work in a terminal. Priced in Australian dollars for teams in Australia, on the same key as every other model.
GPT-5.3-Codex API pricing in Australia
In Australian dollars, the currency your card is charged in, with the published US dollar rate beside each.
For scale: 1,000 requests of about 3,000 tokens in and 1,000 out cost A$29.15 — a long prompt and a page of answer each. Every rate is published and stays the same from one request to the next. See every model.
Prices are our published US dollar rates converted at A$1.47 to the dollar, our rate for October — the same rate your card is charged.
About GPT-5.3-Codex
GPT-5.3-Codex was OpenAI’s dedicated model for Codex, its coding agent. It combined the coding of the earlier Codex model with the reasoning of GPT-5.2, and at launch scored 77.3% on Terminal-Bench 2.0 and 56.8% on SWE-Bench Pro. OpenAI says engineers used early versions of it to help debug its own training.
It always reasons, from low to extra-high effort. The general GPT-6 models have since caught up and passed it on coding, so it makes most sense where a workflow was built around it.
What is GPT-5.3-Codex good for?
- Coding agents that work in a terminal.
- Large refactors that touch many files.
- Workflows already built around Codex.
Where to be careful
- A generation behind GPT-6 on agentic coding.
- Its knowledge stops at August 2025, and its 400K context is smaller than current flagships’.
Specs
gpt-5.3-codexUsing GPT-5.3-Codex from Australia
Roar AI provides access to GPT-5.3-Codex through the Roar AI gateway, charged in Australian dollars on one bill with every other model. Requests from Australia go through our gateway in Singapore today; a gateway in Sydney is coming. Developers can use GPT-5.3-Codex alongside other supported models without a separate integration for every provider.
Use the OpenAI SDK you already have — point it at Roar AI and name the model. Read the docs.
from openai import OpenAI
client = OpenAI(base_url="https://api.roar-ai.com/v1", api_key="roar_live_…")
reply = client.chat.completions.create(
model="gpt-5.3-codex",
messages=[{"role": "user", "content": "Summarise this contract in plain English."}],
)Where is GPT-5.3-Codex processed?
GPT-5.3-Codex is a frontier model, and requests are processed on international infrastructure, outside Australia. The model directory says where each model is processed.
Explore related models
Questions
How much does GPT-5.3-Codex cost in Australia?
Input is A$2.65 per 1M tokens; output is A$21.20 per 1M tokens. For scale, 1,000 requests of about 3,000 tokens in and 1,000 out cost A$29.15. Prices are our published US dollar rates converted at A$1.47 to the dollar, our rate for October — the same rate your card is charged. The rate is published and does not change from one request to the next.
Is GPT-5.3-Codex open source?
No. OpenAI does not publish the weights, so it is only available through an API like this one.
Try GPT-5.3-Codex
on one key
Sign up, get a key and call it with the SDK you already use. Pay in your local currency, on one bill.