OpenAI Ships GPT-6.1 Terra: Agents Now Fill Forms at Half the Price (2026)

GPT-6.1 Terra is OpenAI's new mid-tier model for computer use. It arrived on October 26 with a line that anyone who publishes forms should read twice. In OpenAI's announcement on X, the model "understands what's on screen, takes action across apps, writes naturally". OpenAI pitches it as a cheaper way to hand an agent "more of your workday". Among the tasks it lists: filling out forms.

Here is what shipped, why the price matters, and what changes for the forms your agent builds and publishes.

What OpenAI announced

GPT-6.1 Terra sits below GPT-6.1 Sol and GPT-6 Astra in OpenAI's lineup. OpenAI aims it at everyday work that involves looking at a screen and acting on it: proposals, technical drawings, invoices, forms, video editing. According to TestingCatalog's coverage, it runs in ChatGPT Work, Codex and the API. OpenAI also reports that Terra matches GPT-6 Astra on its Agents' Last Exam benchmark at one tenth the price per token.

The price is the story. Press coverage puts the API at half the price of GPT-6.1 Sol. OpenAI's own comparison goes further. At maximum effort, Terra is "over three times as token-efficient as Claude Opus 5.5, and one-fourth its price per token". Those are OpenAI's numbers, from its own evaluations, so treat them as a claim rather than a measurement. However, the direction is clear. Computer use, the thing that lets an agent click through a web page, just got cheap enough to run all day.

Why this matters if your agent publishes forms

Two things change when agents can fill forms cheaply.

First, agents will fill the forms you publish, not only people. A procurement agent will fill your demo request. A candidate's assistant will fill your application. That is not a problem if your form scores answers: points per answer sort an agent's answers the same way they sort a human's. It is a problem if a person reads each submission, because the volume goes up.

Second, the agent on your side gets cheaper too. If GPT-6.1 Terra runs your workflow, asking it to build a form, publish it and read the scored answers gets cheaper too. Computer use is the slow way to do that, though. An agent that clicks through a form builder's interface is paying for screenshots. An agent that calls a form builder's API, or its MCP server, is paying for a few hundred tokens.

That is the design choice behind dForms: the form builder for AI agents. Your agent does not drive a browser to make a form. It describes the form, and dForms builds it, publishes it and scores every answer. The AI form generator guide walks through what that looks like end to end.

Try it with dForms

Connect your agent once, through the dForms MCP server at mcp.dforms.ai or with an API key from the Developers page, and paste this:

Build a demo request form in dForms with name, work email, company size
(1, 2 to 10, 11 to 50, 51 to 200, 200+), what they want to automate (open text)
and when they want to start (this month, this quarter, later).
Score it: company size 11 to 200 = 10 pts, 2 to 10 = 5, others = 2;
this month = 10, this quarter = 6, later = 1.
Label 70% or more as Hot. Leave it in draft and send me the preview link.

Whatever fills the form afterwards, a person or a GPT-6.1 Terra agent, the answers come back scored. dForms does not count or bill responses, and the project is open source, so a spike in agent traffic costs nothing. Want the same scoring on a hiring form? The pre-screening questions template uses it.

Frequently asked questions

What is GPT-6.1 Terra?

GPT-6.1 Terra is OpenAI's mid-tier model for computer use, announced on October 26, 2026. It reads what is on screen, acts across apps and writes, at a lower price than GPT-6.1 Sol and GPT-6 Astra.

Can GPT-6.1 Terra fill out a web form?

Yes. OpenAI lists forms among its target tasks. The model looks at the page, finds the fields and types the answers, the way a person would.

Does a form in dForms work with agents built on GPT-6.1 Terra?

Yes. Any agent that can call an HTTP API with a key can build and read dForms forms. The public form itself is a normal web page, so any computer-use agent can fill it.