Is GPT-5.1-Codex-Max or OpenAI: GPT-5.1 Chat cheaper?

GPT-5.1-Codex-Max and OpenAI: GPT-5.1 Chat have comparable output pricing.

Which has the larger context window, GPT-5.1-Codex-Max or OpenAI: GPT-5.1 Chat?

OpenAI: GPT-5.1 Chat has the larger context window (128K tokens).

GPT-5.1-Codex-Max vs OpenAI: GPT-5.1 Chat

Both have similar output pricing, while OpenAI: GPT-5.1 Chat offers a larger context window. Choose GPT-5.1-Codex-Max or OpenAI: GPT-5.1 Chat based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	GPT-5.1-Codex-Max	OpenAI: GPT-5.1 Chat
Provider	OpenAI	OpenAI
Input / 1M tokens	—	$1.25
Output / 1M tokens	—	$10.00
Context window	—	128K
Parameters	—	—
Open weights	No	—
Released	Nov 2025	—

GPT-5.1-Codex-Max details →OpenAI: GPT-5.1 Chat details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.