Lab Test:

Prompt Playground: One Prompt, 6 Outcomes

What We Were Testing

We wanted to understand how different prompt structures impact the quality, tone, and usefulness of GPT’s responses—specifically in the context of marketing copy and brand alignment.

Why We Did It

Clients often ask, “Can you give me the perfect prompt?”—but the reality is, effective prompting depends on the goal, context, and tone. This test helps show why there’s no one-size-fits-all answer.

How We Ran the Test

What We Did

Took one request: “Write a LinkedIn post about our AI Chatbot product for SMBs.” Then tested 6 prompt types:

Directive

Gives GPT a clear, direct instruction to write exactly what’s needed.

Conversational

Prompts GPT to write in a casual, human-like tone—like talking to a colleague.

Persona-Based

Frames the output through the lens of a specific audience or character (e.g., a startup founder).

Framework (PAS)

Uses proven copywriting formulas like Problem–Agitate–Solution for structure and persuasion.

Constraint-Based

Adds rules like “keep it under 100 words” or “avoid buzzwords” to sharpen the output.

GPT-as-Copywriter

Instructs GPT to act like a professional marketer, applying best practices automatically.

The Takeaways

What We Learned

Different prompt styles shape not just what GPT writes—but how well it resonates and performs.

Structure Meets Style

Framework + Persona combo gave the best mix of tone + structure.

Casual Connects

Conversational tone was best for engagement.

On-Brand by Design

“GPT as…” prompts created the most brand-aligned copy.

What’s Next

We’ll create a downloadable “Prompt Pack” clients can plug into their own GPTs.