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What is GPT-6.1 Terra, and can I use it on ChatGPT Plus?

Last checked: 27 October 2026 · The AI Till, UK

Why can't I see GPT-6.1 Terra in ChatGPT?

Short answer: it only appears in Work and Codex, and it is still rolling out.

ChatGPT Learn says plainly that the model "isn't available in Chat". To find it:

1. Open the ChatGPT desktop app, or ChatGPT on the web.
2. Switch from Chat to Work using the switcher at the top.
3. Open the model list (in the desktop app it sits under Advanced) and choose GPT-6.1 Terra.

Work also supports Terra on mobile. If it isn't listed, the rollout may not have reached your account yet. OpenAI says it arrives "as it reaches your account", and Enterprise access depends on your administrator. New to Work? Read what ChatGPT Work is and whether it's in Plus first.

OpenAI also notes that some Plus and Pro users may find Terra (at Medium effort) already set as the default in Work's Power presets, in place of GPT-6.1 Sol. So you may be using it without picking it.

Is GPT-6.1 Terra included in ChatGPT Plus, or does it cost extra?

Short answer: it's included in Plus. There's no separate charge in ChatGPT.

The release notes list Plus among the plans getting it and say your plan's overall usage limits are unchanged. OpenAI's launch post adds that "your plan goes further" with Terra: the same allowance covers more tasks than with GPT-5.6 Terra, and substantially more than with GPT-6.1 Sol or GPT-6 Astra. That's OpenAI's claim, and we haven't measured it. For what Plus costs and what is capped, see does ChatGPT Plus have limits? and is ChatGPT Plus worth it in the UK?.

The only Terra prices OpenAI publishes are for developers using the API: $1 per million input tokens and $5 per million output tokens (OpenAI launch post, read 27 October 2026). Those don't apply to a normal ChatGPT subscription.

What's the difference between Terra and Sol?

Short answer: Terra is the faster, cheaper workhorse. Sol and Astra are the heavier models for the hardest jobs.

OpenAI says that for the most complex coding tasks, Sol and Astra are still the better choice. For filling in a form or tidying a spreadsheet, Terra is meant to be good enough and quicker. The Chat tab models are explained in our guide to what GPT-6 means for a small business.

What does Terra mean for a UK trade or small business?

Short answer: it's aimed squarely at admin you already do on a screen, such as invoices, forms and photos of jobs.

OpenAI's own examples include reading incoming invoices and entering their details into accounting software, interpreting technical drawings, filling out forms and drafting proposals. For a sole trader or small firm, that maps to jobs like these:

• Supplier invoices into your books. Ask Work to read this week's supplier invoices and enter the date, supplier, net, VAT and total into your bookkeeping sheet, or into Xero or QuickBooks in a browser where you're signed in. Check every line before you save it.
• Photo or drawing to draft quote. Give it a site photo or a plan and your own price list, and ask for a first draft of materials and labour. It can't measure your job for you, so treat every quantity as a guess to check on site.
• Supplier or council forms. Let it fill in a trade account application or a permit form from details you provide, then stop before submitting so you can read it through.

A prompt to try in Work

Using GPT-6.1 Terra: open the PDFs in my "Supplier invoices October" folder. For each one, add a row to my bookkeeping spreadsheet with the invoice date, supplier name, invoice number, net amount, VAT and total. Don't guess any figure you can't read clearly: leave it blank and list it at the end. Don't pay, send or delete anything.

To use it on your own computer's apps, OpenAI's Computer Use guide says you install the Computer Use plugin in the desktop app (in Work, open Plugins) and grant the permissions it asks for. Browser use and computer use each have their own setup steps.

Is it safe to let ChatGPT use my computer?

Short answer: it can be, if you keep each task narrow and read every permission prompt.

OpenAI says Computer Use can change things outside the task you set, so it advises scoped tasks and reviewing permission prompts. Its release notes on Work's browser say it asks for confirmation before consequential actions such as payments. On Windows, Computer Use takes over the screen while it runs, so you can't carry on working in the same session.

Before you hand it a job:

• Close tabs and apps it doesn't need, especially online banking, HMRC and your inbox.
• Only allow the apps the task needs, and avoid "always allow" until you trust the result.
• Keep customer names and addresses out where you can. UK GDPR still applies: see can I put customer data into ChatGPT?.
• Check every figure it types into your accounts. OpenAI reports a lower error rate than the previous Terra on its own tests, but it still makes mistakes.

More on this in is ChatGPT safe for business? and how to use AI agents in business.

If you'd rather start with simpler copy-and-paste prompts than an agent clicking around, the AI Till Trades Pack has 40 AI prompts for UK trades plus editable quote, invoice and payment reminder templates. It's our own product, and it works with any ChatGPT plan.

Limits and risks

• Rollout timing. Not every Plus account will see Terra on day one.
• Not in Chat. You need Work or Codex, which Free and Go plans don't include.
• Allowance still applies. Terra stretches your allowance further, OpenAI says, but long computer tasks still use it up.
• Claims are OpenAI's. The speed, cost and accuracy figures in the launch post come from OpenAI's own tests.
• Region. Terra doesn't support UAE inference residency. Nothing in OpenAI's notes excludes the UK.

Related questions

What is GPT-6.1 Terra?

A fast, efficient OpenAI model released on 26 October 2026 that combines visual reasoning, computer use and clear writing. It runs in ChatGPT Work and Codex, and in the API as gpt-6.1-terra.

Is GPT-6.1 Terra free?

Not on the free plan. It's included at no extra charge in Plus, Pro, Business, Enterprise and Edu, inside each plan's usage limits.

Why isn't Terra in my model list?

It's only in Work and Codex, not Chat, and it is rolling out gradually. Switch to Work and check the model list again later.

Does Terra use up my ChatGPT limit faster?

OpenAI says the opposite: the same allowance covers more tasks with Terra than with GPT-6.1 Sol or GPT-6 Astra. Your plan's overall limits are unchanged.

Can ChatGPT enter invoices into my accounting software?

OpenAI gives that as an example use. With Work's browser or Computer Use set up, it can type details into apps you allow. Check every entry before saving.

Is GPT-6.1 Terra available in the UK?

OpenAI's notes don't list a UK restriction, and OpenAI began rolling out Computer Use to the UK in June 2026. Availability still depends on your plan and the rollout reaching your account.

Sources

• OpenAI: Introducing GPT-6.1 Terra (26 October 2026, read 27 October 2026)
• OpenAI Help Center: ChatGPT release notes, 26 October 2026 entry (read 27 October 2026)
• ChatGPT Learn: What's new, 26 to 30 October 2026 (read 27 October 2026)
• ChatGPT Learn: Computer Use (read 27 October 2026)

Checked 27 October 2026. Rules and prices change, so check the source before you rely on it. This is general information, not legal, tax or financial advice.

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• Are custom GPTs being retired, and what should a UK small business do?
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• Can AI help me write a book?
• Can AI proofread a document?

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