GPT-5.6 Terra

Name: GPT-5.6 Terra
Author: OpenAI

gpt-5.6-terra · OpenAI · Codex

Input

$2.00

per million tokens

Output

$12.00

per million tokens

Blended

$4.50

input weighted 3:1 over output, because a coding agent reads far more than it writes

Plans that include it

Plan	Price	API equivalent on max possible usage
OpenAI ChatGPT Go	$8/mo	$199/mo
OpenAI ChatGPT Plus	$20/mo	$497/mo
OpenAI ChatGPT Pro	$100/mo	$2,387/mo

Checked 2026-08-20. JSON: /api/models/gpt-5.6-terra