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 2.5 Flash Native Audio Preview 09-2025.
Gemini 2.5 Flash Native Audio Preview 09-2025 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 |
|---|---|---|---|---|---|---|
| US | No | $0.75 | $4.50 | Input price |
Gemini 2.5 Flash Native Audio Preview (Sept 2025) by Google, an earlier preview of the native audio model for real-time voice and multimodal interactions.
Step-by-step setup for running Copilot for Obsidian on each of these models through Opper.
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