Lucy-128k
Lucy-128k is a chat model from Menlo, released July 18, 2025. Lucy-128k is an open-weights chat model.
by Menlo
Best for
Ways to use Lucy-128k in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your Menlo API key. osFoundry discovers Lucy-128k 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
Lucy-128k 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.
Lucy-128k vs similar models
Licence
Unspecified — Licence terms not specified — verify the upstream model card before commercial use.
Check upstream documentation.
Frequently asked about Lucy-128k
Is Lucy-128k free to use?
Lucy-128k 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 Lucy-128k 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 Lucy-128k locally?
Yes. Lucy-128k is open-weights and runs locally on a workstation GPU. osFoundry's local runtime handles model loading, quantisation, and routing.
What is Lucy-128k best at?
Lucy-128k is well-suited to text generation.
How do I use Lucy-128k in osFoundry?
Paste your Menlo API key in the key dialog (or deploy the open weights for self-hostable models), assign Lucy-128k to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by Menlo on July 18, 2025. Source: https://huggingface.co/Menlo/Lucy-128k