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Text · Released Oct 2026

OpenAI GPT 6.1 Terra

OpenAI's fast, efficient GPT-6.1 tier for visual reasoning, computer use and clear writing, improving on GPT 5.6 Terra with a 1M-token context window.

OpenAI's GPT 6.1 Terra is a cloud text model. It is multimodal: alongside a text prompt it accepts images, then replies with generated text. Its context window handles up to 1.05M input tokens and up to 128K output tokens, and it supports adjustable reasoning effort for harder problems. Generation can be tuned with system instructions. It runs through Runware, OpenRouter, and OpenAI using your own API key, from $1.00 per million input tokens.

Modality
Text
Model ID
openai/gpt-6.1-terra
Specs
Released
Oct 2026
Pricing
$1.00 / 1M in · $5.00 / 1M out
Inputs
Text, Images
Context window
1.05M in · 128K out
Reasoning
Adjustable effort
Controls
System prompt
Real outputs

Samples

Generated with GPT 6.1 Terra via OpenRouter. The same three prompts run against every text model in the catalog, shown verbatim, so the only thing that changes between two models’ answers is the model.

Short answer38 / 50 words

Explain what an API is to someone who has never written code. Do not use a restaurant or waiter analogy. Plain prose only — no headings, bullet points, or markdown formatting. Maximum 50 words.

An API is a way for one piece of software to request information or actions from another. For example, a weather app can use an API to ask a weather service for today’s forecast and display the result.

Medium answer82 / 150 words

A two-person startup is deciding whether to build their own user authentication or use a hosted provider. Give them a clear recommendation, then the single strongest argument against your own recommendation. Plain prose only — no headings, bullet points, or markdown formatting. Maximum 150 words.

Use an established hosted authentication provider. For a two-person startup, authentication is security-critical work that can consume time better spent building the product. Choose a provider with strong security features, transparent pricing, and a workable user export path. The strongest argument against this choice is dependence on a third party for access to your product: if the provider has an outage, your users may be unable to sign in, and you may have little control over how quickly the problem is fixed.

Long answer205 / 190–220 words

Write a briefing for a non-technical executive explaining why their company's spending on AI is hard to predict, and what they can do about it. Cover at least three distinct causes. Plain prose only — no headings, bullet points, or markdown formatting. Write exactly 205 words.

AI spending is difficult to forecast because costs depend on both technical choices and how employees and customers actually use the technology. An application that succeeds can become more expensive quickly: every additional question, document, or automated task may generate a charge, and long or complex requests often cost more. Prices and demand also change. Providers revise fees, introduce new models, and offer discounts with different conditions, while scarce computing capacity can push up infrastructure costs. Meanwhile, spending extends beyond vendor bills: preparing data, integrating systems, checking accuracy, protecting sensitive information, and meeting regulatory obligations all require people and money. To gain control, set a budget for each use case and assign an accountable owner. Track the full cost per useful outcome, such as a resolved customer enquiry, rather than simply counting subscriptions. Start with limited pilots, measure savings and quality, and expand only when the results justify the expense. Use spending alerts and limits, and review supplier contracts for pricing changes and exit costs. Choose less expensive models for routine tasks, reserve premium options for demanding work, and reduce unnecessary requests. Finally, forecast a range of scenarios rather than a single number, including rapid adoption and unexpected compliance costs, and revisit those forecasts regularly.

About the creator

OpenAI

OpenAI builds GPT, DALL·E, the Sora family, and the open-weight gpt-oss models, and has been a central force behind the modern wave of generative AI.

openai.com ↗
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