mj_fast_variation

Technical Specifications of mj-fast-variation

What is mj-fast-variation?

mj-fast-variation is a CometAPI model endpoint for running Midjourney-style image variation jobs through a unified API layer. Rather than generating from scratch, it is designed for the stage of the workflow where you already have a base image and want closely related alternatives.

In Midjourney terminology, “variations” means producing different versions of an existing image by changing either small details or the broader visual arrangement while keeping the main idea intact. The “fast” label strongly suggests this endpoint is optimized for lower-latency variation requests, making it useful for interactive creative iteration, asset exploration, and production pipelines that need multiple candidate outputs quickly. This speed characterization is an inference supported by third-party Midjourney API documentation that distinguishes fast mode from slower alternatives.

On CometAPI, the model appears as part of the platform’s Midjourney catalog and is billed per request, which makes it straightforward to integrate into applications that need image refinement, concept branching, or automated creative testing.

Main features of mj-fast-variation

• Image-to-image refinement: Generates new versions of an existing image instead of requiring you to restart the creative process from zero.
• Preserves core visual intent: Variations keep the main theme of the source image while changing composition, styling details, or visual emphasis.
• Supports iterative creative exploration: Useful for comparing multiple directions from one approved concept, which fits design review and content production workflows.
• Fast-mode responsiveness: The endpoint is positioned as a fast variation option, suitable for shorter turnaround cycles than slower queue-based modes in comparable Midjourney API systems.
• Commercial-use friendly listing: CometAPI labels the model for commercial use, which is valuable for business integrations and production deployments.
• Simple per-request pricing: The CometAPI listing shows fixed per-request billing at $0.056, making cost estimation easier for batch jobs and product features.
• Unified access through CometAPI: Available through CometAPI’s aggregated model platform, allowing teams to manage authentication and consumption from one API layer.

How to access and integrate mj-fast-variation

Step 1: Sign Up for API Key

Sign up on CometAPI and generate your API key from the dashboard. After that, store it securely as an environment variable such as COMETAPI_API_KEY so your application can authenticate requests without hardcoding secrets.

Step 2: Send Requests to mj-fast-variation API

Send a request to the CometAPI endpoint using the model ID mj-fast-variation. A typical integration includes your API key in the authorization header, specifies mj-fast-variation as the target model, and passes the required variation parameters based on the original image or task you want to branch from.

curl https://api.cometapi.com/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $COMETAPI_API_KEY" \
  -d '{
    "model": "mj-fast-variation",
    "input": {
      "task_id": "your-source-image-task-id"
    }
  }'

Step 3: Retrieve and Verify Results

After submission, retrieve the generated results from the API response or by polling the related task endpoint, depending on your workflow. Verify that the returned images match the expected variation behavior, check job status fields, and store the resulting asset URLs or metadata for downstream use in your application.