Hermes is an open agent from Nous Research, the team behind the Hermes family of open-weight models. It runs as a terminal agent for general assistant and tool-use workflows, designed in the open and built to be steerable and unopinionated rather than locked down. On Opper it runs on a single key across 700+ models with full observability and a choice of region.
HermesoninPaste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
GPT OSS 20B 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 | No | $0.07 | $0.30 | |
| Geodd | EU/EEA | No | $0.03 | $0.14 | |
| Greenference | EU | No | $0.0090 | $0.04 | |
| Regolo | EU | No | $0.11 | $0.48 | |
| DigitalOcean | US | No | $0.05 | $0.45 | |
| Geodd | US | No | $0.03 | $0.14 | |
| Groq | US | No | $0.07 | $0.30 | |
| Novita | US | No | $0.04 | $0.15 | |
| Fireworks | Multi | No | $0.07 | $0.30 |
GPT-OSS 20B by OpenAI: open-weight Apache 2.0 model, 21B params (3.6B active), near o3-mini, for efficient and on-device reasoning.
Anthropic's desktop agent for knowledge work. Run it on any model on Opper, not just Claude.
Anthropic-compatible
An open-source personal agent for everyday tasks. Run it on any model on Opper.
opper launch openclaw
The AI copilot for Obsidian notes. Pick Opper from its provider list and chat with your vault on any of 700+ models.
Opper built in