OpenAI: GPT-5.1-Codex

GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....

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Rank

391K

Context Window

$1.25

Min Input /1M

$10.00

Min Output /1M

Model Info

Model ID	openai-gpt-5-1-codex
Modality	text+image->text
Context Window	391K tokens
Platforms	OR

Usage & Rankings

Rank	Unranked
Weekly Usage	—

Cross-Platform Pricing

Platform	Input /1M	Output /1M	Context	Model ID
OR OpenRouter	$1.250	$10.000	391K	openai/gpt-5.1-codex

Input

$1.250

/ 1M tokens

Output

$10.000

/ 1M tokens

Round Trip

$11.25

/ 1M tokens

Value Rating

🔴

🔴 Premium — best for quality-critical tasks

About OpenAI: GPT-5.1-Codex

OpenAI: GPT-5.1-Codex is a large language model with a 391K token context window.

The best available input price is $1.250/1M tokens and output price is $10.000/1M tokens, with a round-trip cost of $11.25/1M tokens.