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.
Green R Raw 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 | Cache read |
|---|---|---|---|---|---|---|
| EU | No | $0.39 | $1.06 | Input price |
green-r-raw GreenPT Backed by GPT-OSS Direct access to the same reasoning stack as green-r without the GreenPT system prompt. Input €0.35 Output €0.95 Context 128k Max output 32k Released Aug 2025 Text Images Documents Multilingual No system prompt
Step-by-step setup for running Open WebUI on each of these models through Opper.
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