Create SEO-Optimized Blog Articles with GPT-4o Mini's Multi-Stage Generation

Overview
This workflow converts a single topic into a full blog article through a structured multi-step process. Instead of generating everything in one pass, it breaks the task into clear stages to produce cleaner structure, better SEO consistency, and more predictable output quality.

How this workflow differs from asking ChatGPT directly
It does not produce an article in one step.
It separates the process into two focused stages: outline generation and paragraph expansion.
This approach gives you more control over tone, SEO, structure, and keyword placement.

How it works

1. Generate outline
   The workflow sends your topic to an AI Agent.
   It returns a structured outline based on the topic, desired depth, language, and keyword focus.

2. Expand each subtopic
   The workflow loops through each outline item.
   Every subtopic is expanded into a detailed, SEO-friendly paragraph.
   Output is consistent and optimized for readability.

3. Produce final outputs
   Combines all expanded sections into:
   A clean JSON object
   A Markdown version ready for blogs or CMS
   The JSON includes:
   Title
   HTML content
   Markdown content
   You can send this directly to REST APIs such as WordPress, Notion, or documentation platforms.
   Content is validated for readability and typically scores well in tools like Yoast SEO.
   Uses GPT-4o Mini by default, with average token usage between 2000 and 3000 depending on outline size.

Use cases
Auto-generate long-form articles for blogs or content marketing.
Turn Instagram or short-form scripts into complete SEO articles.
Create documentation or educational content using consistent templates.

Setup steps

1. Prepare credentials
   Add your OpenAI API Key inside n8n’s credential manager.

2. Adjust input parameters
   Topic or main idea
   Number of outline items
   Language
   Primary keyword
   Tone or writing style (optional)

3. Customize the workflow
   Switch the model if you want higher quality or lower token usage.
   Modify the prompt for the outline or paragraph generator to match your writing style.
   Add additional nodes if you want to auto-upload the final article to WordPress, Notion, or any API.

4. Run the workflow
   Enter your topic
   Execute the workflow
   Retrieve both JSON and Markdown outputs for immediate publishing

If you need help expanding this into a full content pipeline or want to integrate it with other automation systems, feel free to customize further.