# Aider

> Run the terminal pair-programmer against the gateway in either wire format.

_Source: https://aiprimetech.io/docs/guides/aider/ · Home > Docs > Integration guides_

Aider routes model calls through LiteLLM, so it accepts either format depending on how you name the model.


## OpenAI-compatible route

```bash
export OPENAI_API_BASE="https://aiprimetech.io/v1"
export OPENAI_API_KEY="sk-your-key"

aider --model openai/claude-sonnet-4-6
```


## Anthropic route

```bash
export ANTHROPIC_API_BASE="https://aiprimetech.io"
export ANTHROPIC_API_KEY="sk-your-key"

aider --model anthropic/claude-sonnet-4-6
```

> The `openai/` or `anthropic/` prefix tells LiteLLM which format to speak. Get it wrong and you will see a 404 as the request goes to the endpoint that does not match the body.


## Recommended flags

```bash
# a cheaper model for commit messages and summaries
aider --model anthropic/claude-sonnet-4-6 \
      --weak-model anthropic/claude-haiku-4-5
```

Aider makes frequent small auxiliary calls. Sending those to Haiku instead of the main model is a meaningful saving on a long session at no quality cost.

- [Models](https://aiprimetech.io/docs/getting-started/models/) — Ids and prices
- [Cost control](https://aiprimetech.io/docs/guides/cost-control/) — Route by task


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_ClaudeAPIKey.dev is an independently operated, Anthropic-compatible API gateway. Not affiliated with Anthropic._