aider-cache-default-on

To enable prompt caching in Aider by default, you can use a configuration that automatically applies the `--cache-prompts` flag. This shifts caching from an opt-in feature to a default-on mechanism, reducing input costs.

High Anthropic model input costs in Aider often occur because prompt caching is not enabled by default. Activating the `--cache-prompts` flag optimizes cache hit rates and prevents unnecessary token billing.

Aider prompt caching does not work with all models. The default caching activation includes a per-model gate, ensuring it only triggers for Anthropic models that specifically support cache features, leaving unsupporting models unaffected.

The best way to opt out of default prompt caching is to disable the `--cache-prompts` setting in your configuration. This converts the caching mechanism from a default-on process back to an opt-in choice for your session.

You need to enable prompt caching in Aider when working with supported Anthropic models to reduce input costs. Without it, you lose potential savings from cache hits during repeated code generation or editing sessions.

Yes, you can configure Aider to automatically use prompt caching for Anthropic models by setting the `--cache-prompts` flag as a default. This ensures caching is active whenever a compatible model is used.