Instantly via the EU router or as a dedicated GPU deployment. Data stays in Europe.
Hermes 4 405B is an open-source language model from NousResearch with a 131K-token context window, hosted on EU GPUs via an OpenAI-compatible API.
Shared EU router, pay-per-token, scale-to-zero. Dedicated GPU deployments are billed hourly, see pricing.
Bench is our quality index for every model, 0 to 100. It rests on the Epoch AI Capabilities Index (about 40 benchmarks), completed with LiveBench, and is refreshed every morning.
No public benchmark yet: estimated from size and release date.
Range 65.5 to 88.7
Sources: Epoch AI ↗ · LiveBench ↗ · Refreshed daily, last on 25-09-2026
No public benchmark yet: estimated from size and release date.
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": "NousResearch/Hermes-4-405B",
"messages": [{"role": "user", "content": "Hello!"}]
}'Yes. HostYourAI runs Hermes 4 405B 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.
Via the shared EU router you pay €1.15 per million input tokens and €3.45 per million output tokens, with no fixed costs. For high volume or isolation you can also run Hermes 4 405B as a dedicated hourly GPU instance.
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.
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