Playground

Try any model on the shelf. Every answer is a real request, billed to your balance at the price on its card.

PlaygroundGPT-5.3 Codex$1.75 in / $14.00 out

GPT-5.3 Codex$1.75 in / $14.00 out

Ask it anything

Pick a model and send a message. This is the real gateway, not a demo.

Try any model on the shelf. Every answer is a real request, billed to your balance at the price on its card.

Answers here are real requests to real models, so they are billed to an account.

Model parameters

Model

GPT-5.3 Codex

Answer strength

How long the model thinks before it answers. Thinking costs more: those tokens are billed at the output rate.

TemperatureModel default

Model default

Lower is steadier, higher is more inventive.

System prompt

Context400,000 tokens

Price$1.75 in / $14.00 out per 1M tokens