Runs as your own dedicated GPU deployment, ready to launch from the wizard. Data stays in Europe.
1. Model Summary 2. How to use 3. Evaluation 4. Training 5. Limitations 6. Legal Aspects
Shared EU router, pay-per-token, scale-to-zero. Dedicated GPU deployments are billed hourly, see pricing.
✓ Verified working on 20-07-2026, responded in 115 ms on our EU infrastructure.
Drop-in replacement for OpenAI: change only the base URL and API key. The Anthropic format (/v1/messages) is supported too.
curl https://hostyourai.com/api/v1/chat/completions \
-H "Authorization: Bearer hyai-..." \
-H "Content-Type: application/json" \
-d '{
"model": "swiss-ai/Apertus-v1.1-4B-Instruct",
"messages": [{"role": "user", "content": "Hello!"}]
}'Yes. HostYourAI runs Apertus v1.1 4B Instruct on GPUs in European datacenters via vLLM. Prompts and outputs never leave the EU and there is no US cloud provider in the chain.
Yes. All processing happens inside the EU, a Data Processing Agreement (DPA) is available and the subprocessor list is public. Open-source weights also mean: no training on your data.
Apertus v1.1 4B Instruct is available on request: through the shared EU router after a quick chat, or as your own dedicated GPU deployment billed per hour. Tell us your use case and we will set it up for you.
Yes. You use the standard OpenAI SDKs with a custom base URL (https://hostyourai.com/api/v1). The Anthropic Messages API is supported as a drop-in as well.
Creating an account takes a minute. Test Apertus v1.1 4B Instruct straight away in the playground.
Start for free