GPT-5.3-Codex API in Singapore

In Singapore 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 S$25.78 — 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 S$1.30 to the dollar, our rate for October — the same rate your card is charged.

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.

• Coding agents that work in a terminal.
• Large refactors that touch many files.
• Workflows already built around Codex.

• A generation behind GPT-6 on agentic coding.
• Its knowledge stops at August 2025, and its 400K context is smaller than current flagships’.

Roar AI provides access to GPT-5.3-Codex through the Roar AI gateway, charged in Singapore dollars on one bill with every other model. Requests from Singapore go through our gateway in Singapore. 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."}],
)

GPT-5.3-Codex is a frontier model, and requests are processed on international infrastructure, outside Singapore. The model directory says where each model is processed.

GPT-5.3-Codex vs Claude Sonnet 5.5Head to headGPT-6.1 SolSimilar priceGPT-6 SolSimilar priceGemini 4 ArgonSimilar price

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