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The Opper extension for VS Code adds Opper’s models to the VS Code chat model picker, so Copilot Chat — agent mode included — runs on any model Opper can reach. Inline completions stay on GitHub’s own service. Models added this way need no Copilot subscription and no GitHub sign-in.

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Setup

1

Install the extension

2

Add your API key

Run Opper: Manage API Key from the Command Palette and paste a key from platform.opper.ai. It is stored in VS Code’s SecretStorage, never in settings.json.
3

Pick a model

Open Copilot Chat and choose an Opper model from the picker. Nothing is listed until a key is set — the model list is scoped to it.

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What the picker shows

The catalogue is fetched at runtime, so there is nothing to hand-list and nothing to keep in sync. Alongside concrete models such as anthropic/claude-sonnet-4-5, two Opper-specific entries appear:
  • Pools — a bare name like claude-sonnet-4-5 that load-balances across every provider serving that model. A pool only advertises a capability every member has.
  • Dynamic routes — your deployed routing graphs, as dynamic/<name>. The graph picks the model per request.
Each entry’s detail line carries where the model is hosted and whether zero data retention is on. opper.euOnly and opper.zdrOnly narrow the list; the gear beside “Opper” in the picker → Choose what to list… turns models, pools and routes on and off individually.

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Scoped to your rules

Discovery is filtered server-side by your model access rules, so a model your policy denies is never offered. Those rules are scoped to the API key’s project — the gear menu leads with which project you are on (Opper · <org> · project <name> · N models), which is the quickest way to spot a key pointing somewhere unexpected.
Copilot Business / Enterprise users may need their org admin to enable the “Bring Your Own Language Model Key in VS Code” policy. Individual plans, and no plan at all, are unaffected.
Prefer a generic OpenAI-compatible bridge? The community OAI Compatible Provider extension also works — point oaicopilot.baseUrl at https://api.opper.ai/v3/compat — but you list each model id by hand and get no pools, routes or residency metadata.

GitHub Copilot CLI

GitHub’s terminal agent, on any Opper model.

Routing graphs

Deploy a route and pick it from the model picker.