GPT-5.6 Sol: Putting OpenAI’s Most Powerful Model to the Test

OpenAI calls GPT-5.6 Sol its most powerful model yet. But “powerful” is a vague label, and benchmark scores don’t necessarily tell you what a model is actually like to use. In the latest Gen AI App Series course, GPT-5.6 Sol, Mike Kaput puts the model to work on a complex business decision with real constraints and no obvious answer, so you can see what it delivers and decide whether it belongs in your daily workflow.

The course focuses on using Sol for difficult professional work that requires sustained reasoning and judgment. You’ll see how to select the right reasoning level for the task, then give Sol an executive-style brief with a clear goal, relevant context, constraints, and a definition of success. In the live demo, Sol tackles a 90-day AI pilot for a 150-person B2B services company, developing a recommendation that includes trade-offs and an implementation plan.

But generating a polished recommendation is only part of the test. You’ll also see how to pressure test Sol’s work from multiple stakeholder perspectives, including a CFO and a skeptical frontline employee, and then have the model revise its recommendation based on those critiques. Along the way, Mike examines Sol’s strengths and limitations and compares it with Fable 5 across intelligence, speed, usage limits, and cost. The goal is to give AI Mastery Members a practical framework for deciding when a frontier reasoning model is worth using and whether Sol should become their new daily driver.

What You’ll Learn

• How to select GPT-5.6 Sol and choose between medium, high, extra high, and pro reasoning levels based on the difficulty of your task.
• How to write executive-style briefs that give Sol a goal, context, constraints, and definition of success instead of relying on step-by-step prompts.
• How to apply Sol to complex, multi-step business decisions, including selecting and structuring an AI pilot.
• How to pressure test Sol’s recommendations from multiple stakeholder perspectives and use those critiques to improve the final output.
• How Sol compares with Fable 5 across intelligence, speed, usage limits, and cost.
• How to evaluate whether Sol is the right model for your everyday professional workflow.

How to Watch

Each week, the Gen AI App Series releases a focused walkthrough from Mike Kaput, Claire Prudhomme or members of the AI Academy Instructor Network. You’ll see the ins and outs of a single AI tool, from productivity apps and research assistants to image, video, and generative media platforms. We want you to leave with a better of understanding of if, when, and how it fits into your workflow.

Courses are also available for individual purchase and are included with AI Mastery Memberships. Watch or purchase the course here: Gen AI Apps Series: GPT-5.6 Sol.

This article was written with support from ChatGPT