Opper 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, through the EU-hosted Opper gateway.
Built on the Language Model Chat Provider API (VS Code 1.104+). Models added this way need no Copilot subscription and no GitHub sign-in.
- 700+ models, discovered at runtime. No hardcoded model ids.
- Pools — a bare name like
claude-sonnet-4.5 that load-balances across every provider serving it.
- Your dynamic routes — deployed routing graphs, as
dynamic/<name>. The graph picks the model per request.
- Residency and ZDR in the picker, with
opper.euOnly / opper.zdrOnly to narrow the list.
- Scoped to your policy. Discovery is filtered server-side by your comply allowlist, so a model your policy denies is never offered.
Setup
- Install the extension.
- Run Opper: Manage API Key and paste a key from platform.opper.ai. It goes into VS Code's
SecretStorage, never settings.json.
- Open Chat and pick an Opper model.
Nothing is listed without a key — the model list is scoped to it.
Settings
| Setting |
Default |
|
opper.baseUrl |
https://api.opper.ai |
Point at another gateway. |
opper.showModels |
true |
List concrete models. |
opper.showPools |
true |
List load-balancing names. |
opper.showDynamicRoutes |
true |
List your deployed routes. |
opper.dynamicRouteToolCalling |
true |
Offer routes in agent mode. |
opper.euOnly |
false |
EU-hosted models only. |
opper.zdrOnly |
false |
Zero-data-retention models only. |
opper.modelFilter |
[] |
Substrings to narrow a long list. |
Only pools and routes: gear next to "Opper" in the model picker → Choose what to list… → untick Models.
Which key am I using? The gear menu leads with it — Opper · <org> · project <name> · N models. Comply rules are scoped to the key's project, so that line is the fastest way to spot a key pointing somewhere you didn't expect. OPPER_API_KEY is used only when no key is stored, and the line says so when it is.
Dynamic routes and agent mode: Opper can't know ahead of time whether a route supports tool calling — the graph decides per request. opper.dynamicRouteToolCalling is a promise you make on the route's behalf. Turn it off if a route can land on a model without tool support.
Development
npm install && npm run compile # bundle to dist/
npm test # typecheck + node --test
F5 launches an Extension Development Host with the extension loaded.
License
MIT © Opper Technology AB
