GPT-6.1 Terra: pricing, availability and use cases
OpenAI introduces GPT-6.1 Terra: USD 1 input and USD 5 output per million tokens, with improved vision and computer use.
Checked on 26 October 2026 against the linked official sources. Prices and access can change; evaluation results are attributed to the vendor.
Direct answer: GPT-6.1 Terra is OpenAI’s model for efficient professional and agent work, introduced on 26 October 2026. Standard API pricing is USD 1 per million input tokens, USD 0.05 for cached input and USD 5 for output. It is available in ChatGPT Work, Codex and the API.
OpenAI positions it as a fast model combining visual reasoning, computer use and clearer writing. Its standard API prices are 50% below GPT-5.6 Terra and GPT-6.1 Sol.
Pricing and availability
The API identifier is gpt-6.1-terra.
- Input: USD 1 per million tokens.
- Cached input: USD 0.05 per million tokens.
- Output: USD 5 per million tokens.
OpenAI announces access for Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, as well as API developers. This announcement concerns those work surfaces rather than a default replacement for every ChatGPT conversation.
Improvements over GPT-5.6 Terra
OpenAI highlights visual understanding and desktop tasks, such as reading technical drawings, completing forms and editing videos. On Agents’ Last Exam at medium reasoning effort, it reports a 15-percentage-point improvement over GPT-5.6 Terra at about one-third the cost.
On an internal error-inducing prompt benchmark at low effort, the reported error rate falls from 53.6% to 16.7%. At maximum effort, OpenAI reports 50.3% on Terminal-Bench 4.0, versus GPT-5.6 Terra’s published 21.5%.
These are OpenAI’s reported evaluations, not independent results produced for this article. Speed and cost comparisons depend on the benchmark, effort setting and tools involved.
Safety and practical use
OpenAI says Terra meets its Critical cybersecurity threshold and retains safeguards developed for GPT-6 Astra. The system-card addendum provides the detailed evaluation context.
Potential workflows include reading invoices and entering their details into accounting software, interpreting a drawing, correcting a webpage layout or editing a video from instructions. The model can propose or perform steps within the tools it receives; a model announcement alone does not connect it to a company’s software.
For a trial, choose a bounded workflow and record accepted results, corrections, total cost and review time. Keep approval for consequential actions and check the resulting file or record before relying on it.
Frequently asked questions
How much does GPT-6.1 Terra cost? Standard API input, cached input and output cost USD 1, USD 0.05 and USD 5 per million tokens respectively, as announced on 26 October 2026.
Where is it available? In ChatGPT Work and Codex for Plus, Pro, Enterprise and Edu users, and in the OpenAI API as gpt-6.1-terra.
Is it better than GPT-6 Astra? OpenAI positions it for efficient high-volume work. Its launch comparisons depend on the task and reasoning effort and do not establish a universal ranking.
What is it mainly for? Professional workflows combining visual reasoning, writing and actions in software, with results reviewed in the actual application.