Apertus-8B-Instruct-2509-unsloth-bnb-4bit
Apertus-8B-Instruct-2509-unsloth-bnb-4bit (unsloth, 2025) is a 8 billion parameter chat model. Apertus-8B-Instruct-2509-unsloth-bnb-4bit is an open-weights chat model with roughly 8 billion parameters.
by unsloth · 8B parameters
Best for
Ways to use Apertus-8B-Instruct-2509-unsloth-bnb-4bit in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your unsloth API key. osFoundry discovers Apertus-8B-Instruct-2509-unsloth-bnb-4bit 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
Apertus-8B-Instruct-2509-unsloth-bnb-4bit 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 Apertus-8B-Instruct-2509-unsloth-bnb-4bit
Apertus-8B-Instruct-2509-unsloth-bnb-4bit runs on a single 16GB consumer GPU (~5 GB VRAM with KV-cache headroom). Full-precision inference fits on a single H100 80GB at FP16 precision (~20 GB).
Apertus-8B-Instruct-2509-unsloth-bnb-4bit vs similar models
Licence
Unspecified — Licence terms not specified — verify the upstream model card before commercial use.
Check upstream documentation.
Frequently asked about Apertus-8B-Instruct-2509-unsloth-bnb-4bit
Is Apertus-8B-Instruct-2509-unsloth-bnb-4bit free to use?
Apertus-8B-Instruct-2509-unsloth-bnb-4bit 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 Apertus-8B-Instruct-2509-unsloth-bnb-4bit 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 Apertus-8B-Instruct-2509-unsloth-bnb-4bit need?
Approximately 5 GB at Q4 quantisation, or 20 GB at full FP16 precision. Fits on a single 24GB consumer GPU.
Can I run Apertus-8B-Instruct-2509-unsloth-bnb-4bit locally?
Yes. Apertus-8B-Instruct-2509-unsloth-bnb-4bit is open-weights and runs locally on a workstation GPU. osFoundry's local runtime handles model loading, quantisation, and routing.
What is Apertus-8B-Instruct-2509-unsloth-bnb-4bit best at?
Apertus-8B-Instruct-2509-unsloth-bnb-4bit is well-suited to text generation.
How do I use Apertus-8B-Instruct-2509-unsloth-bnb-4bit in osFoundry?
Paste your unsloth API key in the key dialog (or deploy the open weights for self-hostable models), assign Apertus-8B-Instruct-2509-unsloth-bnb-4bit to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by unsloth on October 2, 2025. Source: https://huggingface.co/unsloth/Apertus-8B-Instruct-2509-unsloth-bnb-4bit