GPT-5.1-Codex-Max 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-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
What OpenRouter says about GPT-5.1-Codex-Max

Facts

Maker: OpenAI
Models: 1 on OpenRouter
Newest: openai/gpt-5.1-codex-max

From OpenRouter and our own checks. JSON · Markdown

Why it's listed

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

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Models 1

Model	Released	Context	Input / 1M	Output / 1M	Supports
GPT-5.1-Codex-Max `openai/gpt-5.1-codex-max`	Dec 2025	400k	$1.25	$10	tools, structured output, reasoning, caching, image

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