How to use Continue with a custom Anthropic or OpenAI-compatible API

Continue is an open-source AI coding extension for VS Code and JetBrains IDEs (IntelliJ IDEA, PyCharm and friends). Models are defined in a YAML file, each with its own provider, apiBase and apiKey, so it can reach CCSub over either the Anthropic or the OpenAI-compatible protocol — and you can define several models side by side.

Where the config lives

Continue now uses config.yaml; its docs state that it replaces the older, deprecated config.json.

A complete example

First store the key in ~/.continue/.env:

CCSUB_API_KEY=sk-your-key

Then edit ~/.continue/config.yaml:

name: CCSub
version: 1.0.0
schema: v1
models:
  - name: CCSub Claude
    provider: anthropic
    model: claude-sonnet-5
    apiBase: https://www.ccsub.net/api/v1
    apiKey: ${{ secrets.CCSUB_API_KEY }}
    roles: [chat, edit, apply]
  - name: CCSub GPT
    provider: openai
    model: gpt-5.5
    apiBase: https://www.ccsub.net/api/v1
    apiKey: ${{ secrets.CCSUB_API_KEY }}
    roles: [chat, edit, apply]

Save it, and both names appear in the chat model dropdown. The model field takes IDs such as claude-sonnet-5 or gpt-5.5; the full list is on the models page.

What each field does

• Top-level name, version, schema are all required; schema is always v1. Leaving one out produces a config error.
• name (per model) is the label shown in the dropdown.
• provider: anthropic uses the Anthropic protocol (requests messages); openai uses the OpenAI protocol (requests chat/completions).
• apiBase is https://www.ccsub.net/api/v1 for both providers. Continue adds the trailing slash for you.
• apiKey: ${{ secrets.CCSUB_API_KEY }} is looked up in .env at the workspace root or .continue/.env, then in ~/.continue/.env.
• roles says where the model is used: chat, edit, apply, autocomplete, embed, rerank or summarize. The default is chat, edit, apply and summarize.

Agent mode and autocomplete

• Agent mode needs a model with tool calling. If Continue does not detect it, add capabilities: [tool_use] to the model block.
• Autocomplete: Continue's documentation notes that chat models often perform poorly at Tab autocomplete, so the example does not give these models the autocomplete role.

Verify

Select the new model in the Continue chat and send a message. Then open the Usage page in your CCSub dashboard — if the request is listed, you are done. Other agent extensions for VS Code include Cline and Kilo Code; if you are considering a different editor, see the Cursor guide.