acestep-captioner
Released by ACE-Step in 2026, acestep-captioner is an speech-and-audio model. acestep-captioner is an open-weights audio model.
by ACE-Step
Best for
Ways to use acestep-captioner in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your ACE-Step API key. osFoundry discovers acestep-captioner automatically — assign it to a Maestro role (router, direct, orchestrator, or fallback) in the Pipeline tab and it is live in every chat. Your key, your provider account — no token markup.
Deploy a dedicated endpoint
acestep-captioner is open-weights — run it locally for free, or deploy a dedicated GPU endpoint in your workspace for reserved capacity with no rate limits.
Use it in a Room App
Room Apps declare AI features in their manifest, then call them with invokeAI:
import { invokeAI } from '@osfoundry/app-sdk'
// 'summarize' is an AI feature declared in your app manifest.
const result = await invokeAI('summarize', userText)
Call it from your own apps
Once a model is wired into your workspace you can host it as an API and reach it from your own services, scripts, or CI — outside osFoundry.
acestep-captioner vs similar models
| Model | Org | Params | Context | Input price | Self-host |
|---|
| acestep-captioner | ACE-Step | — | — | Free (local) | Yes |
| maya1 | maya-research | — | — | Free (local) | Yes |
| kb-whisper-base | KBLab | — | — | Free (local) | Yes |
| whisper-medium-mlx | mlx-community | — | — | Free (local) | Yes |
Licence
Unspecified — Licence terms not specified — verify the upstream model card before commercial use.
Check upstream documentation.
Frequently asked about acestep-captioner
Is acestep-captioner free to use?
acestep-captioner is free to run locally on your own hardware. Hosted access through osFoundry is metered (input Free (local), output Free (local)). You can switch between local and hosted at any time.
Can I use acestep-captioner commercially?
Commercial use is allowed with conditions. Licence terms not specified — verify the upstream model card before commercial use. Check upstream documentation.
Can I run acestep-captioner locally?
Yes. acestep-captioner is open-weights and runs locally on a workstation GPU. osFoundry's local runtime handles model loading, quantisation, and routing.
What is acestep-captioner best at?
acestep-captioner is well-suited to text to audio.
How do I use acestep-captioner in osFoundry?
Paste your ACE-Step API key in the key dialog (or deploy the open weights for self-hostable models), assign acestep-captioner to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by ACE-Step on January 23, 2026. Source: https://huggingface.co/ACE-Step/acestep-captioner