Copilot for Obsidian puts an AI assistant inside your Obsidian vault: chat with your notes, generate and rewrite content, and query your whole knowledge base without leaving the app. It is open source, its bring-your-own-key setup needs no Copilot license, and Opper is one of the providers in its catalogue: pick Opper, paste your key, and your vault runs on any of 700+ models, with your notes going only to the model you chose.
Copilot for ObsidianoninObsidian → Settings → Copilot → BYOK → Add a provider, search for Opper — the base URL comes prefilled, then paste your Opper key. Then pick Gemini 3.5 Flash-Lite.
Gemini 3.5 Flash-Lite 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 | $0.30 | $2.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| EU | No | $0.33 | $2.75 | $0.03 | Not offered on this route | |||
| US | No | $0.30 | $2.50 | $0.03 | ||||
| Multi | No | $0.30 | $2.50 | $0.03 | Not offered on this route | Not offered on this route | ||
| Multi | No | $0.30 | $2.50 | $0.03 |
Gemini 3.5 Flash Lite is Google's low-latency workhorse for high-volume automation, pairing 1M context with audio, video, and PDF understanding.
Step-by-step setup for running Copilot for Obsidian on each of these models through Opper.
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