Aider v0.51.0

What's new in Aider v0.51.0, released Aug 20, 2024 (2.2y ago). Newer: v0.86.0 (Aug 9, 2025)

Release notes

Prompt caching for Anthropic models with --cache-prompts.
- Caches the system prompt, repo map and /read-only files.
Repo map recomputes less often in large/mono repos or when caching enabled.
- Use --map-refresh <always|files|manual|auto> to configure.
Improved cost estimate logic for caching.
Improved editing performance on Jupyter Notebook .ipynb files.
Show which config yaml file is loaded with --verbose.
Bumped dependency versions.
Bugfix: properly load .aider.models.metadata.json data.
Bugfix: Using --msg /ask ... caused an exception.
Bugfix: litellm tokenizer bug for images.
Aider wrote 56% of the code in this release.