- The
/v1/messagesshape withx-api-keyauthentication - Open models on EU infrastructure you control
- Also OpenAI-compatible through the same Router
- No training on your data; subprocessor list public
EU Router 03 Serve
Claude API alternative
Keep your Anthropic SDK and run open models on European GPUs instead of the Claude API.
GLM
DeepSeek
Qwen
Kimi
Mistral
Llama
gpt-oss
Gemma
Loes
Nemotron
Claude Code
Codex
OpenCode
Cursor
Cline-
Loes
-
OpenAI SDK
Anthropic SDK
What it does EU Router
Anthropic-compatible, EU-hosted
Want to keep using the Anthropic API but keep your inference in Europe? HostYourAI speaks the Anthropic API through a /v1/messages shim. You point your existing client at our Router and run open models on European GPUs.
Read more
02 EU Router
What you get
03 EU Router
One platform for both APIs
If you run applications on both the OpenAI and the Anthropic API, you can do so through the same Router and the same EU GPUs. That keeps your stack simple and your data inside Europe.
04 EU Router
How to switch
Migrating does not take weeks. Your existing Anthropic SDK keeps working: set the base URL to our Router and use your HostYourAI key as x-api-key.
python
from anthropic import Anthropic
client = Anthropic(
base_url="https://hostyourai.com",
api_key="hyai-...",
)
msg = client.messages.create(
model="llama-3.3-70b",
max_tokens=512,
messages=[{"role": "user", "content": "Hello"}],
)
print(msg.content[0].text)Pick an open model from the Model Garden, test in the Playground and track usage and cost per request. Want more detail? Read the guide Migrate your OpenAI client to the EU Router.
05 EU Router
Claude API next to HostYourAI
| Claude API | HostYourAI | |
|---|---|---|
| Models | Claude, closed | Open: Llama, Qwen, Mistral, DeepSeek |
| API shape | /v1/messages | Same /v1/messages shape, plus the OpenAI route |
| Processing | United States | GPUs in the EU |
| Streaming | Token by token | Buffered via the Anthropic route; token by token via the OpenAI route |
| Images | Yes | Not yet via the Anthropic route, text-only |
| Auditability | Black box | Open weights |
Questions
Questions about the Claude API alternative
Do I get the same quality as Claude?
Closed frontier models lead on some tasks. For many business workloads, such as summarising, RAG and structured output, open models perform strongly and are auditable. Test your own use case honestly in the Playground.
Does my existing Anthropic code work?
Yes. You change the base URL and use your hyai- key as x-api-key. The /v1/messages shape stays the same; details are on the Anthropic-compatible API page.
What are the shim limitations?
Streaming is answered buffered and messages are text-only. If you need token-by-token streaming or multimodal input, use the OpenAI route on the same Router.
Why would I move away from Claude?
Usually data location: Anthropic processes in the US. With HostYourAI, prompts and outputs stay in the EU, with a Data Processing Agreement and no training on your data.
Can I migrate gradually?
Yes. Run both side by side and route per workload; the API shape is the same, so switching is a configuration change.
What does it cost?
Per token, per model class, from one prepaid balance. See the pricing page and the model catalog.
Everything you need for AI
From model hosting to a customer-facing API, it is built for developers and businesses who want their AI running on infrastructure they actually control, inside the EU.
EU-hosted
100%
Your data and your models stay on European GPUs. GDPR-friendly by design.
Verified models, ready to serve
700+
Llama, Qwen, DeepSeek, Mistral, FLUX and plenty more. Pick one and it is warm in minutes, with no DevOps on your end.
OpenAI & Anthropic compatible
2 SDK
Point your existing client at the Router and keep your tools. No rewrite, no lock-in.
From zero to a warm endpoint in minutes
No infra to manage. Pick a model, get an OpenAI-compatible URL, ship.
01
Pick a model
Choose from the Model Garden or paste any HuggingFace ID. Set the VRAM and pick an EU GPU.
02
Get your endpoint
We deploy vLLM, run readiness probes, and hand you a warm OpenAI- and Anthropic-compatible URL plus an API key.
03
Route and ship
Point your client at the Router. It auto-routes to a warm instance and logs every request.
Works with the tools you already use
The Router speaks the OpenAI and Anthropic APIs, so it drops straight into the clients and SDKs your team already runs. Just change the base URL.
Docker-
Anthropic
Hugging Face
LangChain
Python
Node.js
curl
Ollama
JetBrains
Jupyter
Vercel
Zapier
Postman
n8n
Built for teams that can't send data away
If a US cloud is off the table, HostYourAI gives you the same developer experience on European infrastructure.
01
Public sector & government
Citizen data that legally has to stay in the EU, with full auditability.
02
Regulated enterprise
Finance, healthcare and legal teams under GDPR, DORA and the AI Act.
03
EU SaaS & scale-ups
Ship AI features your customers trust, without a US sub-processor.
04
Agencies & integrators
Deliver private AI for clients on infrastructure you can stand behind.
Model garden
Works with 700+ open models
Text and image models on dedicated EU GPUs. Every model tested on our own hardware.
The platform
One platform, four layers
Start with one layer and add the others when the work asks for it. They share one key, one balance and one Activity view.
Related pages
Explore more about EU-hosted AI on HostYourAI.
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Read moreEurope's AI infrastructure.
Come build with us.
Start with one key today. Add dedicated GPUs when your workload needs them.
