GPT-5.3 Chat by OpenAI, chat-tuned model with a 272K context, vision, and tools for conversational use.
Available on
Pricing from$1.75/ 1M input$14.00/ 1M output272Kcontext
Privacy
- ZDR
- Training
- No
- Region
- EU
Run Copilot for Obsidian on GPT-5.3 Chat
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.
RunCopilot for Obsidianonin
Copilot for ObsidianoninConnect Copilot for Obsidian to GPT-5.3 Chat
Add Opper in Copilot for Obsidian
Obsidian → Settings → Copilot → BYOK → Add a provider, search for Opper — the base URL comes prefilled, then paste your Opper key. Then pick GPT-5.3 Chat.
Model id
Where you can run it
GPT-5.3 Chat 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 |
|---|---|---|---|---|---|
| Azure | EU | No | $1.75 | $14.00 |
The model
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