Agent Breaking Changes_

← Aider

Aider Aider v0.84.0

2025-05-30 · official notes

Summary

• Model support & provider updates
• Added support for new Claude models including the Sonnet 4 and Opus 4 series (e.g., claude-sonnet-4-20250514,
• claude-opus-4-20250514) across various providers. The default sonnet and opus aliases were updated to these newer

Full notes

## Model support & provider updates

- Added support for new Claude models including the Sonnet 4 and Opus 4 series (e.g., `claude-sonnet-4-20250514`,
`claude-opus-4-20250514`) across various providers. The default `sonnet` and `opus` aliases were updated to these newer
versions.
- Added support for the `vertex_ai/gemini-2.5-flash-preview-05-20` model.
- Updated default OpenRouter models during onboarding to `deepseek/deepseek-r1:free` for the free tier and
`anthropic/claude-sonnet-4` for paid tiers.
- Automatically refresh GitHub Copilot tokens when used as OpenAI API keys, by Lih Chen.

## Core functionality improvements

- Fixed an issue where files explicitly added via the command line were not correctly ignored if listed in `.gitignore`.
- Improved automatic commit messages by providing more context during their generation, by wangboxue.
- Fixed OpenRouter token cost calculation for improved accuracy.

## Quality of life improvements

- Improved OpenRouter model metadata handling by introducing a local cache, increasing reliability and performance.
- Added shell tab completion for file path arguments (by saviour) and for `--edit-format`/`--editor-edit-format` options.
- The `/settings` command now displays detailed metadata for active main, editor, and weak models.
- Improved user language detection by correctly normalizing hyphenated language codes (e.g., `en-US` to `en`) and enhancing the validation of locale results.
- Prevented aider from instructing the LLM to reply in 'C' or 'POSIX' when these are detected as the system locale.
- Displayed a spinner with the model name when generating commit messages.
- Bumped configargparse to 1.7.1 as 1.7 was pulled.