GPT-6.1 Terra Guide

GPT-6.1 Terra is a mid-tier OpenAI model released on October 26, 2026. OpenAI built it for fast, capable computer use at a lower price: understanding what is on screen, taking action across apps, coding, and writing naturally.

Terra is built for the everyday work you want done quickly and cheaply.

ChatGPT

Rolling out to Plus, Pro, Enterprise, and Edu users

Codex

Available in OpenAI’s coding agent

API

Model ID gpt-6.1-terra

Input

$1 per million tokens

Cached input

$0.05 per million tokens

Output

$5 per million tokens

That is well below the previous Terra model’s $2 input and $12 output. Prices can change, so check OpenAI’s pricing page.

• OpenAI says Terra matches GPT-6 Astra at about a tenth of the price per token
• OpenAI says it runs more than three times faster than GPT-6 Astra and GPT-6.1 Sol
• Independent analysts at Artificial Analysis found a clear gain over the previous Terra at less than a third of the cost per task

Most performance figures come from OpenAI. Test it on your own work.

• Reads screens and takes actions across apps
• Good for form filling, data entry, and app testing
• Watch it work at first and keep approvals on for anything sensitive

• Fast edits, bug fixes, and tests in Codex
• Good for many small tasks run in parallel
• Use a larger model for the hardest architecture problems

• Drafting emails and documents
• Summaries and analysis
• Research with sources

Choose Terra

High-volume, everyday, and computer-use tasks where speed and cost matter

Choose a larger model

The hardest reasoning, research, and long, complex projects

• OpenAI rates Terra at its Critical level for cybersecurity under its Preparedness Framework, with safeguards in place
• Computer-using agents can act as you, so limit access
• Never let it handle passwords or payments

• Pick ten real tasks
• Run them on Terra and your current model
• Compare quality, speed, and cost per finished task

Here is the task, the files, and what done looks like. Show your plan, then complete it, and list anything you are unsure about.