Aider

A terminal agent. Two variables, like Claude Code, but OpenAI names.

Three fields. Copy, don’t type

export OPENAI_API_BASE=https://cheapai.lol/v1
export OPENAI_API_KEY=sk-…
aider --model openai/claude-opus-4.8

Do it in order. Don’t skip

1. Install Aider: pip install aider-install, then run aider-install.

2. Open a terminal and set two variables. On macOS and Linux use the export lines from the card below.

3. On Windows PowerShell it looks different: $env:OPENAI_API_BASE="https://cheapai.lol/v1" and $env:OPENAI_API_KEY="your key".

4. Run: aider --model openai/claude-opus-4.8

5. The openai/ prefix is required — that's how Aider knows this is a compatible server, not OpenAI itself.

6. Type “hi”.

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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