Aider v0.73.0 Release Notes — What's New

Full support for o3-mini: aider --model o3-mini
New --reasoning-effort argument: low, medium, high.
Improved handling of context window size limits, with better messaging and Ollama-specific guidance.
Added support for removing model-specific reasoning tags from responses with remove_reasoning: tagname model setting.
Auto-create parent directories when creating new files, by xqyz.
Support for R1 free on OpenRouter: --model openrouter/deepseek/deepseek-r1:free
Enforce user/assistant turn order to avoid R1 errors, by miradnanali.
Case-insensitive model name matching while preserving original case.
Harden against user/assistant turn order problems which cause R1 errors.
Fix model metadata for openrouter/deepseek/deepseek-r1
Aider wrote 69% of the code in this release.