CodeGPT

A VS Code chat plugin. Provider is Custom / OpenAI Compatible.

Three fields. Copy, don’t type

Do it in order. Don’t skip

1. Install CodeGPT from the VS Code marketplace.

2. Open the CodeGPT panel on the left, click the gear → Settings.

3. Provider: Custom (OpenAI Compatible).

4. API URL: https://cheapai.lol/v1 (with /v1). API Key: your full key. Model: claude-opus-4.8.

5. Save and type “hi” in the CodeGPT chat.

Check

If it didn’t start

• “401 / unauthorized / invalid api key” — the key was not copied whole. It starts with sk- and has no space at either end.
• “model not found” / “named models unavailable” / model in red — the name must match exactly: claude-opus-4.8. Not “Opus 5”, not opus, not claude-3, not gpt-4.
• The app shows no models — reopen its settings page: the model list is served from our address and appears once the Base URL and key are right.
• “Connection error” / spinner and silence — wrong Base URL. Almost every app wants the address with a /v1 tail.
• “/v1/v1” in the error — the app appends /v1 itself. Drop the tail, leave the site address.
• It replied, then stopped — you ran out of tokens. The balance is in your dashboard. Topping up on FunPay from the same nick lands on the same key.

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