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 GPT-6 Luna Decisions.
GPT-6 Luna Decisions 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 | $0.10 | $0 | Input price |
OpenAI Decisions model: typed predicate, choice and score answers with probabilities and confidence. Text and inline base64 image input. Use POST /v3/compat/decisions (OpenAI Decisions format; a bare gpt-6-luna resolves here) or POST /v3/compat/v1/systemone with model openai/gpt-6-luna-decisions (System One format, text only).
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