Aider

• Added support for all GPT-5 models.

• Added support for Grok-4 via xai/grok-4 and openrouter/x-ai/grok-4 model names.

• Added support for gemini/gemini-2.5-flash-lite-preview-06-17 model, by Tamir Zahavi-Brunner.

• /clear now prints “All chat history cleared.” so you know it worked, by Zexin Yuan.

• /undo output now shows only the first line of each commit message, making it easier to read.

• Added support for openrouter/moonshotai/kimi-k2 model, by Jack Harrington.

• Display model announcements with no-arg /model command.

• Fixed an issue where new settings for an existing model didn't replace the old ones, by Andrew Grigorev.

• Fixed analytics to support the latest PostHog SDK event-capture API.

• Bumped dependencies to pick up latest litellm==1.75.0.

• Aider wrote 88% of the code in this release.

New Models

• Added support for new Gemini models including gemini-2.5-pro, gemini-2.5-flash, and gemini-2.5-pro-preview-06-05 with thinking tokens support.
• Updated model aliases: flash now points to gemini-2.5-flash and gemini now points to gemini-2.5-pro.
• Support for Responses API models like o1-pro, o3-pro.
• Added support for OpenAI o3-pro model across multiple providers.
• Enhanced thinking tokens support: can now be disabled by setting to 0, and improved help text with examples.
• Increased max tokens for Deepseek models to 65536 for better performance.
• Updated pricing for o3.

New Features & Enhancements

• Added --add-gitignore-files flag to enable adding files listed in .gitignore to Aider's editing scope, by omarcinkonis.
• Co-authored-by attribution is now enabled by default for commit messages.
• Enhanced commit message generation to use system prompt prefixes, by Luke Reeves.
• Added --commit-language option to specify the language for commit messages, by Kyosuke Takayama.
• Skip expensive file tracking operations when --skip-sanity-check-repo is enabled for better performance, by Makar Ivashko.

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.

• Added support for gemini-2.5-pro-preview-05-06 models.
• Added support for qwen3-235b models.
• Added repo-map support for OCaml and OCaml interface files, by Andrey Popp.
• Added a spinner animation while waiting for the LLM to start streaming its response.
• Updated the spinner animation to a Knight Rider style.
• Introduced --attribute-co-authored-by option to add co-author trailer to commit messages, by Andrew Grigorev.
• Updated Gemini model aliases (e.g., gemini, gemini-2.5-pro) to point to the 05-06 preview versions.
• Marked Gemini 2.5 Pro preview models as overeager by default.
• Commit message prompt specifies the user's language.
• Updated the default weak model for Gemini 2.5 Pro models to gemini/gemini-2.5-flash-preview-04-17.
• Corrected gemini-2.5-pro-exp-03-25 model settings to reflect its lack of support for thinking_budget.
• Ensured model-specific system prompt prefixes are placed on a new line before the main system prompt.
• Added tracking of total tokens sent and received, now included in benchmark statistics.

• Support for GPT 4.1, mini and nano.

• Improved support for using architect mode with Gemini 2.5 Pro.

• Add support for xai/grok-3-beta, xai/grok-3-mini-beta, openrouter/x-ai/grok-3-beta, openrouter/x-ai/grok-3-mini-beta, and openrouter/openrouter/optimus-alpha models.

• Added support for grok-3-fast-beta and grok-3-mini-fast-beta models.

• Added new patch edit format for OpenAI's GPT-4.1 model.

• Added new editor-diff, editor-whole, and editor-diff-fenced edit formats.

• Bugfix for automatically selecting the best edit format to use in architect mode.

• Add alias "grok3" for xai/grok-3-beta.

• Add alias "optimus" for openrouter/openrouter/optimus-alpha.

• Fix URL extraction from error messages.

• Allow adding files by full path even if a file with the same basename is already in the chat.

• Fix quoting of values containing '#' in the sample aider.conf.yml.

• Add support for Fireworks AI model 'deepseek-v3-0324', by Felix Lisczyk.

• Aider wrote 92% of the code in this release.

• Added support for the openrouter/openrouter/quasar-alpha model.

  • Currently free on OpenRouter.
  • Quasar scored 55% on the polyglot coding benchmark
  • Run with aider --model quasar

• Offer OpenRouter OAuth authentication if an OpenRouter model is specified but the API key is missing.

• Prevent retrying API calls when the provider reports insufficient credits.

• Improve URL detection to exclude trailing double quotes.

• Bumped deps to pickup litellm change to properly display the root cause of OpenRouter "choices" errors.

• Improve error message for OpenRouter API connection issues to mention potential rate limiting or upstream provider issues.

• Configure weak models (gemini/gemini-2.0-flash and openrouter/google/gemini-2.0-flash-exp:free) for Gemini 2.5 Pro models.

• Add model metadata for openrouter/google/gemini-2.0-flash-exp:free.

• Updated deps for yanked fsspec and aiohttp packages #3699

• Removed redundant dependency check during OpenRouter OAuth flow, by Claudia Pellegrino.

• Aider wrote 86% of the code in this release.

https://aider.chat/HISTORY.html

• OpenRouter OAuth integration:
  • Offer to OAuth against OpenRouter if no model and keys are provided.
  • Select OpenRouter default model based on free/paid tier status if OPENROUTER_API_KEY is set and no model is specified.
• Prioritize gemini/gemini-2.5-pro-exp-03-25 if GEMINI_API_KEY is set, and vertex_ai/gemini-2.5-pro-exp-03-25 if VERTEXAI_PROJECT is set, when no model is specified.
• Validate user-configured color settings on startup and warn/disable invalid ones.
• Warn at startup if --stream and --cache-prompts are used together, as cost estimates may be inaccurate.
• Boost repomap ranking for files whose path components match identifiers mentioned in the chat.
• Change web scraping timeout from an error to a warning, allowing scraping to continue with potentially incomplete content.
• Left-align markdown headings in the terminal output, by Peter Schilling.
• Update edit format to the new model's default when switching models with /model, if the user was using the old model's default format.
• Add the openrouter/deepseek-chat-v3-0324:free model.
• Add Ctrl-X Ctrl-E keybinding to edit the current input buffer in an external editor, by Matteo Landi.

• Added support for SOTA Gemini 2.5 Pro.
• Added support for DeepSeek V3 0324.
• Added a new /context command that automatically identifies which files need to be edited for a given request.
• Added /edit as an alias for the /editor command.
• Added "overeager" mode for Claude 3.7 Sonnet models to try and keep it working within the requested scope.
• Aider wrote 65% of the code in this release.

• Added support for thinking tokens for OpenRouter Sonnet 3.7.
• Added commands to switch between model types: /editor-model for Editor Model, and /weak-model for Weak Model, by csala.
• Added model setting validation to ignore --reasoning-effort and --thinking-tokens if the model doesn't support them.
• Added --check-model-accepts-settings flag (default: true) to force unsupported model settings.
• Annotated which models support reasoning_effort and thinking_tokens settings in the model settings data.
• Improved code block rendering in markdown output with better padding using NoInsetMarkdown.
• Added --git-commit-verify flag (default: False) to control whether git commit hooks are bypassed.
• Fixed autocompletion for /ask, /code, and /architect commands, by shladnik.
• Added vi-like behavior when pressing enter in multiline-mode while in vi normal/navigation-mode, by Marco Mayer.
• Added AWS_PROFILE support for Bedrock models, allowing use of AWS profiles instead of explicit credentials, by lentil32.
• Enhanced --aiderignore argument to resolve both absolute and relative paths, by mopemope.

• Big upgrade in programming languages supported by adopting tree-sitter-language-pack.
  • 130 new languages with linter support.
  • 20 new languages with repo-map support.
• Added /think-tokens command to set thinking token budget with support for human-readable formats (8k, 10.5k, 0.5M).
• Added /reasoning-effort command to control model reasoning level.
• The /think-tokens and /reasoning-effort commands display current settings when called without arguments.
• Display of thinking token budget and reasoning effort in model information.
• Changed --thinking-tokens argument to accept string values with human-readable formats.
• Added --auto-accept-architect flag (default: true) to automatically accept changes from architect coder format without confirmation.
• Added support for cohere_chat/command-a-03-2025 and gemini/gemma-3-27b-it
• The bare /drop command now preserves original read-only files provided via args.read.
• Fixed a bug where default model would be set by deprecated --shortcut switches even when already specified in the command line.

• Improved support for thinking/reasoning models:

  • Added --thinking-tokens CLI option to control token budget for models that support thinking.
  • Display thinking/reasoning content from LLMs which return it.
  • Enhanced handling of reasoning tags to better clean up model responses.
  • Added deprecation warning for remove_reasoning setting, now replaced by reasoning_tag.

• Aider will notify you when it's completed the last request and needs your input:

  • Added notifications when LLM responses are ready with --notifications flag.
  • Specify desktop notification command with --notifications-command.

• Added/improved support for many models/providers:

  • Added support for QWQ 32B.
  • Support for DeepSeek V3 free on OpenRouter: --model openrouter/deepseek/deepseek-chat:free.
  • Added support for Claude 3.7 Sonnet models on OpenRouter, Bedrock and Vertex AI.
  • Updated default model to Claude 3.7 Sonnet on OpenRouter.
  • Added support for GPT-4.5-preview model.
  • Added support for Claude 3.7 Sonnet:beta on OpenRouter.

• Basic support for Claude 3.7 Sonnet
  • Use --model sonnet to use the new 3.7
  • Thinking support coming soon.
• Bugfix to /editor command.
• Downgrade streamlit dependency to avoid threading bug.
• Added support for tree-sitter language pack.
• Added openrouter/o3-mini-high model configuration.
• Added build.gradle.kts to special files for Kotlin project support, by Lucas Shadler.
• Prevent more than one cache warming thread from becoming active.
• Fixed continuation prompt ". " for multiline input.
• Added HCL (Terraform) syntax support, by Warren Krewenki.
• Have o1 & o3-mini generate markdown by sending the magic "Formatting re-enabled." string.
• Bugfix for multi-line inputs, which should not include the ". " continuation prompt.
• Aider wrote 46% of the code in this release.

• Dynamically changes the Ollama context window to hold the current chat.
• Better support for o3-mini, DeepSeek V3 & R1, o1-mini, o1 via secondary API providers.
• Remove <think> tags from R1 responses for commit messages (and other weak model uses).
• Can now specify use_temperature: <float> in model settings, not just true/false.
• The full docker container now includes boto3 for Bedrock.
• Docker containers now set HOME=/app which is the normal project mount-point, to persist ~/.aider.
• Bugfix to prevent creating incorrect filenames like python, php, etc.
• Bugfix for --timeout
• Bugfix so that /model now correctly reports that the weak model is not changed.
• Bugfix so that multi-line mode persists through ^C at confirmation prompts.
• Watch files now fully ignores top-level directories named in ignore files, to reduce the chance of hitting OS watch limits. Helpful to ignore giant subtrees like node_modules.
• Fast startup with more providers and when model metadata provided in local files.
• Improved .gitignore handling:
  • Honor ignores already in effect regardless of how they've been configured.
  • Check for .env only when the file exists.

• 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.

https://aider.chat/HISTORY.html

• Support for DeepSeek R1.
  • Use shortcut: --model r1
  • Also via OpenRouter: --model openrouter/deepseek/deepseek-r1
• Added Kotlin syntax support to repo map, by Paul Walker.
• Added --line-endings for file writing, by Titusz Pan.
• Added examples_as_sys_msg=True for GPT-4o models, improves benchmark scores.
• Bumped all dependencies, to pick up litellm support for o1 system messages.
• Bugfix for turn taking when reflecting lint/test errors.
• Fix permissions issue in Docker images.
• Added read-only file announcements.
• Bugfix: ASCII fallback for unicode errors.
• Bugfix: integer indices for list slicing in repomap calculations.
• Aider wrote 52% of the code in this release.