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 GLM 5.1.
GLM 5.1 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 |
|---|---|---|---|---|---|
| Nebius | EU | Not by default | No | $1.40 | $4.40 |
| TensorX | EU | Zero data retention | No | $1.40 | $4.40 |
| DeepInfra | US | Zero data retention | No | $1.05 | $3.50 |
| DigitalOcean | US | Not by default | No | $1.30 | $4.30 |
| Novita | US | Zero data retention | No | $1.38 | $4.40 |
| Alibaba Cloud | Multi | Not by default | No | $0.89 | $3.58 |
GLM-5.1 by Z.ai is a 754B open-weight (MIT) coding and agentic reasoning model with 202K context that tops SWE-Bench Pro at 58.4.
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