Context · Objective · Style · Tone · Audience · Response
The Singapore GPT-4 competition winner. Maximum control over voice, audience, and output format.
Background information the AI needs to understand the task and situation.
The specific goal or outcome you want the AI to achieve.
The writing style — e.g., formal, conversational, journalistic, academic.
The emotional register — e.g., persuasive, empathetic, authoritative, friendly.
Who the output is for. Shapes vocabulary, depth, and assumptions.
The exact output format — e.g., bullet list, 500-word article, JSON, table.
Scenario: Writing a product launch email for a SaaS tool targeting CTOs
Context: PromptQuorum is a multi-model AI tool launching in April 2026. Objective: Write a product launch email that drives signups. Style: Clear and direct, no fluff. Tone: Confident and professional. Audience: CTOs at mid-size tech companies. Response: 200-word email with subject line.
CO-STAR stands for Context, Objective, Style, Tone, Audience, and Response — six fields that give you precise control over AI output.
CO-STAR won because it separates Style (presentation) from Tone (emotion), giving more precise control than frameworks that treat them as one field.
Use CO-STAR when you need fine-grained control over voice and audience. Use CRAFT when you want a Role-based framing with a clear Target persona.
All 9 frameworks are built in. Write, optimize with your own LLM, dispatch to 25+ AI models, and run consensus analysis — free, no account required.
Join the Waitlist