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OpenAI GPT 6.1 Sol Pro vs OpenAI GPT 5.6 Sol

Specs, pricing, and capabilities side by side, plus outputs generated from identical prompts, so the only variable between the columns is the model.

Cloud

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

Learn more about GPT 6.1 Sol Pro →
Cloud

OpenAI's flagship GPT-5.6 tier — leads the family on every benchmark, for frontier coding, long-horizon agentic work, and research.

Learn more about GPT 5.6 Sol →
Overview
Creator
OpenAI
OpenAI
Released
Sep 2026
Jul 2026
Available on
OpenRouter
RunwareReplicateOpenRouterOpenAI
Model ID
openai/gpt-6.1-sol-pro
openai/gpt-5.6-sol
Specs
Pricing
$2.00 / 1M in · $10.00 / 1M out
$2.00 / 1M in · $10.00 / 1M out
Inputs
Text, Images
Text, Images
Context window
1.05M in · 128K out
1.05M in · 128K out
Reasoning
Adjustable effort
Adjustable effort
Controls
System prompt
System prompt
Samples
Short answer
Plain language under a hard word cap
43 / 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.

42 / 50 words

An API is a set of rules that lets one piece of software ask another for information or actions. For example, a weather app may use an API to request today’s forecast from a weather service, then display the result for you.

Medium answer
Judgment, structure, arguing against itself
126 / 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.

103 / 150 words

Use a reputable hosted authentication provider. For a two-person startup, authentication is security-critical but rarely differentiating, and building it well requires ongoing work across password storage, account recovery, MFA, session management, abuse prevention, compliance, monitoring, and incident response. A provider lets you launch faster and reduces the chance that a subtle implementation flaw compromises users. Choose one with standards-based integrations and an export path to limit lock-in. The strongest argument against this recommendation is vendor dependency: pricing can rise sharply with user growth, and migrating authentication later can be difficult because password hashes, MFA credentials, sessions, and identity links may not transfer cleanly.

Long answer
Sustained structure across several points
205 / 190–220 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.

223 / 190–220 words

AI spending is hard to predict because usage, pricing, and implementation costs can all change quickly. Unlike traditional software, many AI services charge according to consumption: the number of questions asked, documents processed, images created, or computing resources used. A successful pilot can therefore become much more expensive when thousands of employees or customers adopt it. A second cause is uncertainty about which technology will be needed. Different AI models vary greatly in price, speed, and quality, while vendors frequently release new versions and revise commercial terms. Teams may also discover that a cheaper model is adequate for routine work but that sensitive or complex tasks require more costly systems. Third, the model itself is only part of the bill. Reliable AI often requires data preparation, system integration, security controls, testing, human review, monitoring, training, and legal or compliance work. These supporting costs are easy to underestimate, particularly when projects move from demonstration to production. Executives can improve control by funding AI in stages, with clear limits and decision points. Require each project to define expected usage, business value, accuracy needs, and total operating cost. Track spending by team and use case, set alerts and quotas, and review actual costs monthly. Negotiate vendor protections, avoid unnecessary dependence on one provider, and maintain contingency budgets for rapid growth, compliance changes, or unexpected technical work.

Every sample is the model’s first result for the shared scene prompt (no cherry-picking), generated via Runware or Replicate. Hover a copy icon to read the full prompt.

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