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.
GLM-5.3-Flash runs on the routes below. Route only to EU providers when your data has to stay in Europe. Some routes also sell flex and priority processing: the same model at another price, picked per request with service_tier. How service tiers work.
| Provider | Region | Zero data retention | Training | Input | Output | Cache read | ||
|---|---|---|---|---|---|---|---|---|
| EU | No | $0.28 | $0.56 | Input price | Not offered on this route | Not offered on this route | ||
| EU | No | $0.14 | $0.49 | $0.03 | Not offered on this route | Not offered on this route | ||
| EU | No | $0.12 | $0.49 | $0.02 | Not offered on this route | Not offered on this route | ||
| EU | No | $0.16 | $0.45 | $0.07 | Not offered on this route | Not offered on this route | ||
| EU | No | $0.20 | $0.50 | $0.05 | Not offered on this route | Not offered on this route | ||
| EU | No | $0.11 | $0.45 | $0.02 | Not offered on this route | Not offered on this route | ||
| EU | No | $0.17 | $0.55 | $0.03 | Not offered on this route | Not offered on this route | ||
| EU | No | $0.15 | $0.50 | $0.03 | ||||
| EU | No | $0.20 | $0.60 | $0.07 | Not offered on this route | Not offered on this route | ||
| EU | No | $0.20 | $0.50 | $0.05 | Not offered on this route | Not offered on this route | ||
| US | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| US | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| US | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| US | No | $0.11 | $0.40 | Input price | Not offered on this route | Not offered on this route | ||
| US | No | $0.20 | $0.70 | $0.04 | Not offered on this route | Not offered on this route | ||
| US | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| US | No | $0.15 | $0.50 | $0.03 | Not offered on this route | |||
| US | No | $0.10 | $0.35 | $0.02 | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| India | No | $0.14 | $0.45 | $0.03 | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| Multi | No (opt-in) | $0.45 | $1.50 | $0.09 | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.15 | $0.50 | Input price | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.17 | $0.55 | $0.03 | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.15 | $0.50 | $0.03 | Not offered on this route | Not offered on this route |
GLM-5.3-Flash by Z.ai is a natively multimodal 320B MoE with 18B active parameters, hybrid sparse and linear attention, a 1M-token context, and MIT open weights for coding and agent work.
Step-by-step setup for running Open WebUI on each of these models through Opper.
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