GPT-5.3-Codex by OpenAI

Model family · Model APIs & inference · indexed, not reviewed

on OpenRouter

Not reviewed

No score, grade or rank. This listing is facts from OpenRouter and our own checks, and it stays out of the rankings until the panel reviews it.

How the index works

GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
What OpenRouter says about GPT-5.3-Codex

Facts

Maker: OpenAI
Models: 1 on OpenRouter
Newest: openai/gpt-5.3-codex

From OpenRouter and our own checks. JSON · Markdown

Why it's listed

OpenRouter lists it, with prices from the providers that serve it.

Being indexed says nothing about quality, and nobody can pay for it. Is this yours? Ask for a review.

Models 1

Model	Released	Context	Input / 1M	Output / 1M	Supports
GPT-5.3-Codex `openai/gpt-5.3-codex`	Feb 2026	400k	$1.75	$14	tools, structured output, reasoning, caching, file, image

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