Open WebUI is the most popular self-hosted AI interface, an extensible workspace that teams run on their own infrastructure, offline if needed. It connects to OpenAI-compatible APIs out of the box: add a connection with a base URL and key and the models behind it appear for your users. Connect Opper and one admin setting gives your whole deployment 700+ models, with a choice of EU or US inference behind your own walls.
Open WebUIoninPaste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
Claude Sonnet 5 runs on the routes below. Route only to EU providers when your data has to stay in Europe.
| Provider | Region | Zero data retention | Training | Input | Output |
|---|---|---|---|---|---|
| AWS Bedrock | EU | Zero data retention | No | $2.20 | $11.00 |
| Google Cloud | EU | Enterprise | No | $2.20 | $11.00 |
| Anthropic | US | Enterprise | No | $2.00 | $10.00 |
| Google Cloud | US | Enterprise | No | $2.00 | $10.00 |
| Azure | Multi | Enterprise | No | $2.00 | $10.00 |
Claude Sonnet 5 is Anthropic's balanced production model, bringing near-Opus agentic coding and tool use to a 1M token context window.
A secure AI workspace for companies: 25+ leading models, projects and connectors in one GDPR-compliant platform, hosted in Europe.
built on Opper
The leading open-source AI chat platform. One librechat.yaml block connects it to every model on Opper.
OpenAI-compatibleAsk a question and let a panel of leading AI models vote, debate, and reach consensus, side by side in one place.
by Opper