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ModelRunner
Model creator on ModelRunner
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ACE Studio

ace-studio

ACE Studio has one model in the ModelRunner catalog: ACE-Step, a Music endpoint, priced at $0.0002 per second of audio — generate full songs with vocals from lyrics and genre tags.

1 public model — runnable in a free playground, through the REST API and JavaScript SDK, or from an AI assistant over MCP.

ACE Studio models & pricing

ACE-Step

ACE-Step

ace-studio

Generate full songs or instrumental music from genre tags and optional lyrics, with duration you control up to 4 minutes.

$0.0002 per second of audiotextaudio

What you can build with ACE Studio models

  • Generate full songs with vocals from lyrics and genre tags ACE-Step
  • Create instrumental tracks in a chosen style and duration ACE-Step
  • Prototype music demos from text descriptions ACE-Step

Browse by capability

Use ACE Studio models from Claude & Cursor

Connect the ModelRunner MCP server once and your AI assistant can run every ACE Studio model on this page as a tool — authorized via OAuth, results returned as hosted URLs in the conversation.

Claude Code

claude mcp add --transport http modelrunner https://mcp.modelrunner.run/mcp

Frequently asked questions

What ACE Studio models can I run on ModelRunner?

The catalog has 1 public ACE Studio model: ACE-Step. It covers music. It has its own page with a free playground, the full input schema, and copy-paste code.

How much do ACE Studio models cost?

Pay-per-use, with no subscription: the one ACE Studio model billed per second of audio costs $0.0002, and every page publishes its own rate — some are tiered, so a lower resolution or a shorter clip costs less per run. You buy credits and pay only for what you generate.

How do I call a ACE Studio model from the API?

POST to https://queue.modelrunner.run/ace-studio/ace-step with an Authorization: Key header and the input fields as the top-level JSON body (no wrapper object), then poll the returned status_url and fetch the result from response_url. The JavaScript SDK (@modelrunner/client) wraps that in a single subscribe() call, which is the one place an { input } object is used.

Can I run ACE Studio model from Claude or Cursor?

Yes. Connect the ModelRunner MCP server (https://mcp.modelrunner.run/mcp) once and ACE Studio's model becomes a tool your assistant can call with run_model — authorized over OAuth 2.1, so no API key goes into a config file. Results come back as hosted URLs in the conversation.

More on ModelRunner

Browse the full model catalog, compare live per-configuration rates on the pricing page, see curated sets on explore, or view every model creator.

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