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Text · Released Sep 2026

OpenAI GPT 6.1 Sol Pro

GPT 6.1 Sol in OpenAI's pro reasoning mode, which works longer on each answer for higher quality on hard tasks.

OpenAI's GPT 6.1 Sol Pro 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 OpenRouter using your own API key, from $2.00 per million input tokens.

Modality
Text
Available on
Model ID
openai/gpt-6.1-sol-pro
Specs
Released
Sep 2026
Pricing
$2.00 / 1M in · $10.00 / 1M out
Inputs
Text, Images
Context window
1.05M in · 128K out
Reasoning
Adjustable effort
Controls
System prompt
Samples

Examples

Generated with GPT 6.1 Sol Pro 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 answer43 / 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 set of rules that lets one piece of software request information or actions from another. For example, a weather app can use a weather service’s API to get today’s forecast without needing to know how that service works internally.

Medium answer126 / 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 a hosted authentication provider. For a two-person startup, building and maintaining secure login, password recovery, session management, and abuse prevention is usually a poor use of limited engineering time. A reputable provider lets you focus on the product while reducing the risk of avoidable security mistakes. Choose one with transparent pricing, data export options, and support for standard protocols. The strongest argument against this recommendation is vendor dependence over the gateway to your entire product. If the provider raises prices, has an outage, or changes its terms, your business may suffer, and migrating users can be difficult—especially if credentials aren’t portable. If authentication is itself your competitive advantage or you have requirements no provider can meet, that loss of control may outweigh the time saved.

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 hard to predict because the bill depends on how people use the system, not just how many employees have access. A short question costs less than a long conversation, and features that search documents, generate images, or repeat failed tasks can multiply usage unexpectedly. Prices also vary across providers and models. Teams may switch to more capable, expensive models as expectations rise, while discounts, contract terms, and currency movements change the effective price. Rapid product development makes last year’s budget a weak guide. A third source of uncertainty is the work around the technology. Cleaning company data, connecting systems, testing accuracy, protecting sensitive information, and training staff can cost more than the AI subscription itself. Early pilots often hide these expenses. Finally, successful tools attract demand. A pilot can spread quickly across departments, turning a small experiment into an ongoing operating expense. Manage this uncertainty by budgeting for scenarios rather than one forecast. Track costs by team and business purpose, set usage limits and alerts, and require approval before expanding pilots. Use cheaper models when they meet quality requirements, negotiate clear pricing, and review spending monthly. Judge investments by measurable business outcomes, not adoption alone, and retain flexibility to stop underperforming projects.

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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