Wren-TTS-0.5B-multi-expressive
Wren-TTS-0.5B-multi-expressive is a 1 billion parameter speech-and-audio model from shangeth, released May 4, 2026. Wren-TTS-0.5B-multi-expressive is an open-weights audio model with roughly 1 billion parameters.
by shangeth · 1B parameters
Best for
Ways to use Wren-TTS-0.5B-multi-expressive in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your shangeth API key. osFoundry discovers Wren-TTS-0.5B-multi-expressive 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
Wren-TTS-0.5B-multi-expressive 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.
What hardware can run Wren-TTS-0.5B-multi-expressive
Wren-TTS-0.5B-multi-expressive runs on a single 16GB consumer GPU (~1 GB VRAM with KV-cache headroom). Full-precision inference fits on a single H100 80GB at FP16 precision (~3 GB).
Wren-TTS-0.5B-multi-expressive vs similar models
Licence
Unspecified — Licence terms not specified — verify the upstream model card before commercial use.
Check upstream documentation.
Frequently asked about Wren-TTS-0.5B-multi-expressive
Is Wren-TTS-0.5B-multi-expressive free to use?
Wren-TTS-0.5B-multi-expressive 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 Wren-TTS-0.5B-multi-expressive commercially?
Commercial use is allowed with conditions. Licence terms not specified — verify the upstream model card before commercial use. Check upstream documentation.
How much VRAM does Wren-TTS-0.5B-multi-expressive need?
Approximately 1 GB at Q4 quantisation, or 3 GB at full FP16 precision. Fits on a single 24GB consumer GPU.
Can I run Wren-TTS-0.5B-multi-expressive locally?
Yes. Wren-TTS-0.5B-multi-expressive is open-weights and runs locally on a workstation GPU. osFoundry's local runtime handles model loading, quantisation, and routing.
What is Wren-TTS-0.5B-multi-expressive best at?
Wren-TTS-0.5B-multi-expressive is well-suited to text to speech.
How do I use Wren-TTS-0.5B-multi-expressive in osFoundry?
Paste your shangeth API key in the key dialog (or deploy the open weights for self-hostable models), assign Wren-TTS-0.5B-multi-expressive to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by shangeth on May 4, 2026. Source: https://huggingface.co/shangeth/Wren-TTS-0.5B-multi-expressive