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Myriad

Free

Scale your content creation and get the best writing from ChatGPT, Copilot, and other AIs. Build and fine-tune prompts for any kind of content, from long-form to ads and email.

FreeFree tier
Inputs: textOutputs: text
Type
Open Source
Company
NamePepper
Visit Website GitHub (40 stars)

About Myriad

Myriad is a free, open-source AI content prompt generator designed to streamline content creation with ChatGPT, Copilot, Gemini, Claude, Llama, and other AI models. It provides a structured system of 35+ rules and 150+ instructions that users can mix and match to build targeted prompts for any content type—including blog posts, ads, emails, scripts, and social media. Myriad supports three core workflows: Write (create content from scratch with customizable writing style, tone, SEO keywords, and marketing goals), Rewrite (refresh existing content to improve clarity, add a call-to-action, or mimic a specific voice), and Analyze (deconstruct competitor content or scale existing material with consistent brand voice). A unique follow-up verification prompt checks whether the AI adhered to the specified rules and identifies conflicts, allowing users to refine prompts iteratively. Custom rules can be created and tested, and rules can be prioritized using '!' markers. Myriad is optimized for ChatGPT but works seamlessly across multiple AI platforms, making it a versatile toolkit for writers, marketers, and entrepreneurs.

Key Features

35+ predefined rules and 150+ instructions for prompt building
Write content with customizable writing style, tone, SEO, and marketing goals
Rewrite existing content to improve readability, mimic styles, or add CTAs
Analyze competitor or existing content for strategy and brand consistency
Follow-up verification prompt to check AI compliance and rule conflicts
Custom rule creation and priority marking with '!'
Works with ChatGPT, Gemini, Copilot, Claude, and Llama
Free and open-source tool

Pros & Cons

Pros
  • Free tool with no usage limits
  • Scalable prompt system with 35+ rules and 150+ instructions
  • Verification prompt helps catch rule conflicts and AI compliance issues
  • Compatible with multiple major AI models (ChatGPT, Gemini, Claude, etc.)
  • Allows custom rules and priority marking for fine-grained control
  • Supports write, rewrite, and analyze workflows for complete content lifecycle
Cons
  • Requires some learning to effectively combine rules and instructions
  • Only generates text-based content (no image or multimodal output)
  • The verification prompt identifies conflicts but does not automatically resolve them
  • Dependent on the quality and capabilities of the underlying AI model used

Best For

Creating blog posts, articles, and long-form contentWriting ad copy, email campaigns, and social media postsRewriting and polishing existing content for consistencyAnalyzing competitor content to identify writing strategiesGenerating content with specific tones, audiences, and SEO requirementsExperimenting with and fine-tuning prompts for different AI models

FAQ

What is Myriad?
Myriad is a free AI content prompt generator that helps users build structured prompts for ChatGPT, Copilot, and other AIs. It uses a system of 35+ rules and 150+ instructions to create, rewrite, and analyze content.
Can I use Myriad with AI models other than ChatGPT?
Yes. Myriad is optimized for ChatGPT but also works with Gemini, Copilot, Claude, and Llama.
How do I prioritize a rule?
Add an exclamation mark '!' to the end of a rule label to give it priority over other rules. This tells the AI to follow that rule first even if conflicts arise.
What should I do if the AI skips or misinterprets a rule?
Use the follow-up verification prompt to check if any rules conflicted. If the AI skipped a rule, you can adjust the instructions, shorten them, or add a '!' priority marker to resolve conflicts.
Are there any examples or templates to get started?
Yes, the website provides example prompts and results made with Myriad (e.g., a listicle post on AI customer service) to help users understand how to use the tool.