---
parent: Configuration
nav_order: 10
description: Details about all of aider's settings.
---

# Options reference
{: .no_toc }

You can use `aider --help` to see all the available options,
or review them below.

- TOC
{:toc}

{% include keys.md %}

## Usage summary

<!--[[[cog
from aider.args import get_md_help
cog.out(get_md_help())
]]]-->
```
usage: aider [-h] [--model] [--openai-api-key] [--anthropic-api-key]
             [--openai-api-base] [--openai-api-type]
             [--openai-api-version] [--openai-api-deployment-id]
             [--openai-organization-id] [--set-env] [--api-key]
             [--list-models] [--model-settings-file]
             [--model-metadata-file] [--alias] [--reasoning-effort]
             [--thinking-tokens] [--verify-ssl | --no-verify-ssl]
             [--timeout] [--edit-format] [--architect]
             [--auto-accept-architect | --no-auto-accept-architect]
             [--weak-model] [--editor-model] [--editor-edit-format]
             [--show-model-warnings | --no-show-model-warnings]
             [--check-model-accepts-settings | --no-check-model-accepts-settings]
             [--max-chat-history-tokens]
             [--cache-prompts | --no-cache-prompts]
             [--cache-keepalive-pings] [--map-tokens]
             [--map-refresh] [--map-multiplier-no-files]
             [--input-history-file] [--chat-history-file]
             [--restore-chat-history | --no-restore-chat-history]
             [--llm-history-file] [--dark-mode] [--light-mode]
             [--pretty | --no-pretty] [--stream | --no-stream]
             [--user-input-color] [--tool-output-color]
             [--tool-error-color] [--tool-warning-color]
             [--assistant-output-color] [--completion-menu-color]
             [--completion-menu-bg-color]
             [--completion-menu-current-color]
             [--completion-menu-current-bg-color] [--code-theme]
             [--show-diffs] [--git | --no-git]
             [--gitignore | --no-gitignore]
             [--add-gitignore-files | --no-add-gitignore-files]
             [--aiderignore] [--subtree-only]
             [--auto-commits | --no-auto-commits]
             [--dirty-commits | --no-dirty-commits]
             [--attribute-author | --no-attribute-author]
             [--attribute-committer | --no-attribute-committer]
             [--attribute-commit-message-author | --no-attribute-commit-message-author]
             [--attribute-commit-message-committer | --no-attribute-commit-message-committer]
             [--attribute-co-authored-by | --no-attribute-co-authored-by]
             [--git-commit-verify | --no-git-commit-verify]
             [--commit] [--commit-prompt] [--dry-run | --no-dry-run]
             [--skip-sanity-check-repo]
             [--watch-files | --no-watch-files] [--lint]
             [--lint-cmd] [--auto-lint | --no-auto-lint]
             [--test-cmd] [--auto-test | --no-auto-test] [--test]
             [--analytics | --no-analytics] [--analytics-log]
             [--analytics-disable] [--analytics-posthog-host]
             [--analytics-posthog-project-api-key]
             [--just-check-update]
             [--check-update | --no-check-update]
             [--show-release-notes | --no-show-release-notes]
             [--install-main-branch] [--upgrade] [--version]
             [--message] [--message-file]
             [--gui | --no-gui | --browser | --no-browser]
             [--copy-paste | --no-copy-paste] [--apply]
             [--apply-clipboard-edits] [--exit] [--show-repo-map]
             [--show-prompts] [--voice-format] [--voice-language]
             [--voice-input-device] [--disable-playwright] [--file]
             [--read] [--vim] [--chat-language] [--commit-language]
             [--yes-always] [-v] [--load] [--encoding]
             [--line-endings] [-c] [--env-file]
             [--suggest-shell-commands | --no-suggest-shell-commands]
             [--fancy-input | --no-fancy-input]
             [--multiline | --no-multiline]
             [--notifications | --no-notifications]
             [--notifications-command]
             [--detect-urls | --no-detect-urls] [--editor]
             [--shell-completions] [--opus] [--sonnet] [--haiku]
             [--4] [--4o] [--mini] [--4-turbo] [--35turbo]
             [--deepseek] [--o1-mini] [--o1-preview]

```

## options:

### `--help`
show this help message and exit  
Aliases:
  - `-h`
  - `--help`

## Main model:

### `--model MODEL`
Specify the model to use for the main chat  
Environment variable: `AIDER_MODEL`  

## API Keys and settings:

### `--openai-api-key VALUE`
Specify the OpenAI API key  
Environment variable: `AIDER_OPENAI_API_KEY`  

### `--anthropic-api-key VALUE`
Specify the Anthropic API key  
Environment variable: `AIDER_ANTHROPIC_API_KEY`  

### `--openai-api-base VALUE`
Specify the api base url  
Environment variable: `AIDER_OPENAI_API_BASE`  

### `--openai-api-type VALUE`
(deprecated, use --set-env OPENAI_API_TYPE=<value>)  
Environment variable: `AIDER_OPENAI_API_TYPE`  

### `--openai-api-version VALUE`
(deprecated, use --set-env OPENAI_API_VERSION=<value>)  
Environment variable: `AIDER_OPENAI_API_VERSION`  

### `--openai-api-deployment-id VALUE`
(deprecated, use --set-env OPENAI_API_DEPLOYMENT_ID=<value>)  
Environment variable: `AIDER_OPENAI_API_DEPLOYMENT_ID`  

### `--openai-organization-id VALUE`
(deprecated, use --set-env OPENAI_ORGANIZATION=<value>)  
Environment variable: `AIDER_OPENAI_ORGANIZATION_ID`  

### `--set-env ENV_VAR_NAME=value`
Set an environment variable (to control API settings, can be used multiple times)  
Default: []  
Environment variable: `AIDER_SET_ENV`  

### `--api-key PROVIDER=KEY`
Set an API key for a provider (eg: --api-key provider=<key> sets PROVIDER_API_KEY=<key>)  
Default: []  
Environment variable: `AIDER_API_KEY`  

## Model settings:

### `--list-models MODEL`
List known models which match the (partial) MODEL name  
Environment variable: `AIDER_LIST_MODELS`  
Aliases:
  - `--list-models MODEL`
  - `--models MODEL`

### `--model-settings-file MODEL_SETTINGS_FILE`
Specify a file with aider model settings for unknown models  
Default: .aider.model.settings.yml  
Environment variable: `AIDER_MODEL_SETTINGS_FILE`  

### `--model-metadata-file MODEL_METADATA_FILE`
Specify a file with context window and costs for unknown models  
Default: .aider.model.metadata.json  
Environment variable: `AIDER_MODEL_METADATA_FILE`  

### `--alias ALIAS:MODEL`
Add a model alias (can be used multiple times)  
Environment variable: `AIDER_ALIAS`  

### `--reasoning-effort VALUE`
Set the reasoning_effort API parameter (default: not set)  
Environment variable: `AIDER_REASONING_EFFORT`  

### `--thinking-tokens VALUE`
Set the thinking token budget for models that support it. Use 0 to disable. (default: not set)  
Environment variable: `AIDER_THINKING_TOKENS`  

### `--verify-ssl`
Verify the SSL cert when connecting to models (default: True)  
Default: True  
Environment variable: `AIDER_VERIFY_SSL`  
Aliases:
  - `--verify-ssl`
  - `--no-verify-ssl`

### `--timeout VALUE`
Timeout in seconds for API calls (default: None)  
Environment variable: `AIDER_TIMEOUT`  

### `--edit-format EDIT_FORMAT`
Specify what edit format the LLM should use (default depends on model)  
Environment variable: `AIDER_EDIT_FORMAT`  
Aliases:
  - `--edit-format EDIT_FORMAT`
  - `--chat-mode EDIT_FORMAT`

### `--architect`
Use architect edit format for the main chat  
Environment variable: `AIDER_ARCHITECT`  

### `--auto-accept-architect`
Enable/disable automatic acceptance of architect changes (default: True)  
Default: True  
Environment variable: `AIDER_AUTO_ACCEPT_ARCHITECT`  
Aliases:
  - `--auto-accept-architect`
  - `--no-auto-accept-architect`

### `--weak-model WEAK_MODEL`
Specify the model to use for commit messages and chat history summarization (default depends on --model)  
Environment variable: `AIDER_WEAK_MODEL`  

### `--editor-model EDITOR_MODEL`
Specify the model to use for editor tasks (default depends on --model)  
Environment variable: `AIDER_EDITOR_MODEL`  

### `--editor-edit-format EDITOR_EDIT_FORMAT`
Specify the edit format for the editor model (default: depends on editor model)  
Environment variable: `AIDER_EDITOR_EDIT_FORMAT`  

### `--show-model-warnings`
Only work with models that have meta-data available (default: True)  
Default: True  
Environment variable: `AIDER_SHOW_MODEL_WARNINGS`  
Aliases:
  - `--show-model-warnings`
  - `--no-show-model-warnings`

### `--check-model-accepts-settings`
Check if model accepts settings like reasoning_effort/thinking_tokens (default: True)  
Default: True  
Environment variable: `AIDER_CHECK_MODEL_ACCEPTS_SETTINGS`  
Aliases:
  - `--check-model-accepts-settings`
  - `--no-check-model-accepts-settings`

### `--max-chat-history-tokens VALUE`
Soft limit on tokens for chat history, after which summarization begins. If unspecified, defaults to the model's max_chat_history_tokens.  
Environment variable: `AIDER_MAX_CHAT_HISTORY_TOKENS`  

## Cache settings:

### `--cache-prompts`
Enable caching of prompts (default: False)  
Default: False  
Environment variable: `AIDER_CACHE_PROMPTS`  
Aliases:
  - `--cache-prompts`
  - `--no-cache-prompts`

### `--cache-keepalive-pings VALUE`
Number of times to ping at 5min intervals to keep prompt cache warm (default: 0)  
Default: 0  
Environment variable: `AIDER_CACHE_KEEPALIVE_PINGS`  

## Repomap settings:

### `--map-tokens VALUE`
Suggested number of tokens to use for repo map, use 0 to disable  
Environment variable: `AIDER_MAP_TOKENS`  

### `--map-refresh VALUE`
Control how often the repo map is refreshed. Options: auto, always, files, manual (default: auto)  
Default: auto  
Environment variable: `AIDER_MAP_REFRESH`  

### `--map-multiplier-no-files VALUE`
Multiplier for map tokens when no files are specified (default: 2)  
Default: 2  
Environment variable: `AIDER_MAP_MULTIPLIER_NO_FILES`  

## History Files:

### `--input-history-file INPUT_HISTORY_FILE`
Specify the chat input history file (default: .aider.input.history)  
Default: .aider.input.history  
Environment variable: `AIDER_INPUT_HISTORY_FILE`  

### `--chat-history-file CHAT_HISTORY_FILE`
Specify the chat history file (default: .aider.chat.history.md)  
Default: .aider.chat.history.md  
Environment variable: `AIDER_CHAT_HISTORY_FILE`  

### `--restore-chat-history`
Restore the previous chat history messages (default: False)  
Default: False  
Environment variable: `AIDER_RESTORE_CHAT_HISTORY`  
Aliases:
  - `--restore-chat-history`
  - `--no-restore-chat-history`

### `--llm-history-file LLM_HISTORY_FILE`
Log the conversation with the LLM to this file (for example, .aider.llm.history)  
Environment variable: `AIDER_LLM_HISTORY_FILE`  

## Output settings:

### `--dark-mode`
Use colors suitable for a dark terminal background (default: False)  
Default: False  
Environment variable: `AIDER_DARK_MODE`  

### `--light-mode`
Use colors suitable for a light terminal background (default: False)  
Default: False  
Environment variable: `AIDER_LIGHT_MODE`  

### `--pretty`
Enable/disable pretty, colorized output (default: True)  
Default: True  
Environment variable: `AIDER_PRETTY`  
Aliases:
  - `--pretty`
  - `--no-pretty`

### `--stream`
Enable/disable streaming responses (default: True)  
Default: True  
Environment variable: `AIDER_STREAM`  
Aliases:
  - `--stream`
  - `--no-stream`

### `--user-input-color VALUE`
Set the color for user input (default: #00cc00)  
Default: #00cc00  
Environment variable: `AIDER_USER_INPUT_COLOR`  

### `--tool-output-color VALUE`
Set the color for tool output (default: None)  
Environment variable: `AIDER_TOOL_OUTPUT_COLOR`  

### `--tool-error-color VALUE`
Set the color for tool error messages (default: #FF2222)  
Default: #FF2222  
Environment variable: `AIDER_TOOL_ERROR_COLOR`  

### `--tool-warning-color VALUE`
Set the color for tool warning messages (default: #FFA500)  
Default: #FFA500  
Environment variable: `AIDER_TOOL_WARNING_COLOR`  

### `--assistant-output-color VALUE`
Set the color for assistant output (default: #0088ff)  
Default: #0088ff  
Environment variable: `AIDER_ASSISTANT_OUTPUT_COLOR`  

### `--completion-menu-color COLOR`
Set the color for the completion menu (default: terminal's default text color)  
Environment variable: `AIDER_COMPLETION_MENU_COLOR`  

### `--completion-menu-bg-color COLOR`
Set the background color for the completion menu (default: terminal's default background color)  
Environment variable: `AIDER_COMPLETION_MENU_BG_COLOR`  

### `--completion-menu-current-color COLOR`
Set the color for the current item in the completion menu (default: terminal's default background color)  
Environment variable: `AIDER_COMPLETION_MENU_CURRENT_COLOR`  

### `--completion-menu-current-bg-color COLOR`
Set the background color for the current item in the completion menu (default: terminal's default text color)  
Environment variable: `AIDER_COMPLETION_MENU_CURRENT_BG_COLOR`  

### `--code-theme VALUE`
Set the markdown code theme (default: default, other options include monokai, solarized-dark, solarized-light, or a Pygments builtin style, see https://pygments.org/styles for available themes)  
Default: default  
Environment variable: `AIDER_CODE_THEME`  

### `--show-diffs`
Show diffs when committing changes (default: False)  
Default: False  
Environment variable: `AIDER_SHOW_DIFFS`  

## Git settings:

### `--git`
Enable/disable looking for a git repo (default: True)  
Default: True  
Environment variable: `AIDER_GIT`  
Aliases:
  - `--git`
  - `--no-git`

### `--gitignore`
Enable/disable adding .aider* to .gitignore (default: True)  
Default: True  
Environment variable: `AIDER_GITIGNORE`  
Aliases:
  - `--gitignore`
  - `--no-gitignore`

### `--add-gitignore-files`
Enable/disable the addition of files listed in .gitignore to Aider's editing scope.  
Default: False  
Environment variable: `AIDER_ADD_GITIGNORE_FILES`  
Aliases:
  - `--add-gitignore-files`
  - `--no-add-gitignore-files`

### `--aiderignore AIDERIGNORE`
Specify the aider ignore file (default: .aiderignore in git root)  
Default: .aiderignore  
Environment variable: `AIDER_AIDERIGNORE`  

### `--subtree-only`
Only consider files in the current subtree of the git repository  
Default: False  
Environment variable: `AIDER_SUBTREE_ONLY`  

### `--auto-commits`
Enable/disable auto commit of LLM changes (default: True)  
Default: True  
Environment variable: `AIDER_AUTO_COMMITS`  
Aliases:
  - `--auto-commits`
  - `--no-auto-commits`

### `--dirty-commits`
Enable/disable commits when repo is found dirty (default: True)  
Default: True  
Environment variable: `AIDER_DIRTY_COMMITS`  
Aliases:
  - `--dirty-commits`
  - `--no-dirty-commits`

### `--attribute-author`
Attribute aider code changes in the git author name (default: True). If explicitly set to True, overrides --attribute-co-authored-by precedence.  
Environment variable: `AIDER_ATTRIBUTE_AUTHOR`  
Aliases:
  - `--attribute-author`
  - `--no-attribute-author`

### `--attribute-committer`
Attribute aider commits in the git committer name (default: True). If explicitly set to True, overrides --attribute-co-authored-by precedence for aider edits.  
Environment variable: `AIDER_ATTRIBUTE_COMMITTER`  
Aliases:
  - `--attribute-committer`
  - `--no-attribute-committer`

### `--attribute-commit-message-author`
Prefix commit messages with 'aider: ' if aider authored the changes (default: False)  
Default: False  
Environment variable: `AIDER_ATTRIBUTE_COMMIT_MESSAGE_AUTHOR`  
Aliases:
  - `--attribute-commit-message-author`
  - `--no-attribute-commit-message-author`

### `--attribute-commit-message-committer`
Prefix all commit messages with 'aider: ' (default: False)  
Default: False  
Environment variable: `AIDER_ATTRIBUTE_COMMIT_MESSAGE_COMMITTER`  
Aliases:
  - `--attribute-commit-message-committer`
  - `--no-attribute-commit-message-committer`

### `--attribute-co-authored-by`
Attribute aider edits using the Co-authored-by trailer in the commit message (default: True). If True, this takes precedence over default --attribute-author and --attribute-committer behavior unless they are explicitly set to True.  
Default: True  
Environment variable: `AIDER_ATTRIBUTE_CO_AUTHORED_BY`  
Aliases:
  - `--attribute-co-authored-by`
  - `--no-attribute-co-authored-by`

### `--git-commit-verify`
Enable/disable git pre-commit hooks with --no-verify (default: False)  
Default: False  
Environment variable: `AIDER_GIT_COMMIT_VERIFY`  
Aliases:
  - `--git-commit-verify`
  - `--no-git-commit-verify`

### `--commit`
Commit all pending changes with a suitable commit message, then exit  
Default: False  
Environment variable: `AIDER_COMMIT`  

### `--commit-prompt PROMPT`
Specify a custom prompt for generating commit messages  
Environment variable: `AIDER_COMMIT_PROMPT`  

### `--dry-run`
Perform a dry run without modifying files (default: False)  
Default: False  
Environment variable: `AIDER_DRY_RUN`  
Aliases:
  - `--dry-run`
  - `--no-dry-run`

### `--skip-sanity-check-repo`
Skip the sanity check for the git repository (default: False)  
Default: False  
Environment variable: `AIDER_SKIP_SANITY_CHECK_REPO`  

### `--watch-files`
Enable/disable watching files for ai coding comments (default: False)  
Default: False  
Environment variable: `AIDER_WATCH_FILES`  
Aliases:
  - `--watch-files`
  - `--no-watch-files`

## Fixing and committing:

### `--lint`
Lint and fix provided files, or dirty files if none provided  
Default: False  
Environment variable: `AIDER_LINT`  

### `--lint-cmd`
Specify lint commands to run for different languages, eg: "python: flake8 --select=..." (can be used multiple times)  
Default: []  
Environment variable: `AIDER_LINT_CMD`  

### `--auto-lint`
Enable/disable automatic linting after changes (default: True)  
Default: True  
Environment variable: `AIDER_AUTO_LINT`  
Aliases:
  - `--auto-lint`
  - `--no-auto-lint`

### `--test-cmd VALUE`
Specify command to run tests  
Default: []  
Environment variable: `AIDER_TEST_CMD`  

### `--auto-test`
Enable/disable automatic testing after changes (default: False)  
Default: False  
Environment variable: `AIDER_AUTO_TEST`  
Aliases:
  - `--auto-test`
  - `--no-auto-test`

### `--test`
Run tests, fix problems found and then exit  
Default: False  
Environment variable: `AIDER_TEST`  

## Analytics:

### `--analytics`
Enable/disable analytics for current session (default: random)  
Environment variable: `AIDER_ANALYTICS`  
Aliases:
  - `--analytics`
  - `--no-analytics`

### `--analytics-log ANALYTICS_LOG_FILE`
Specify a file to log analytics events  
Environment variable: `AIDER_ANALYTICS_LOG`  

### `--analytics-disable`
Permanently disable analytics  
Default: False  
Environment variable: `AIDER_ANALYTICS_DISABLE`  

### `--analytics-posthog-host ANALYTICS_POSTHOG_HOST`
Send analytics to custom PostHog instance  
Environment variable: `AIDER_ANALYTICS_POSTHOG_HOST`  

### `--analytics-posthog-project-api-key ANALYTICS_POSTHOG_PROJECT_API_KEY`
Send analytics to custom PostHog project  
Environment variable: `AIDER_ANALYTICS_POSTHOG_PROJECT_API_KEY`  

## Upgrading:

### `--just-check-update`
Check for updates and return status in the exit code  
Default: False  
Environment variable: `AIDER_JUST_CHECK_UPDATE`  

### `--check-update`
Check for new aider versions on launch  
Default: True  
Environment variable: `AIDER_CHECK_UPDATE`  
Aliases:
  - `--check-update`
  - `--no-check-update`

### `--show-release-notes`
Show release notes on first run of new version (default: None, ask user)  
Environment variable: `AIDER_SHOW_RELEASE_NOTES`  
Aliases:
  - `--show-release-notes`
  - `--no-show-release-notes`

### `--install-main-branch`
Install the latest version from the main branch  
Default: False  
Environment variable: `AIDER_INSTALL_MAIN_BRANCH`  

### `--upgrade`
Upgrade aider to the latest version from PyPI  
Default: False  
Environment variable: `AIDER_UPGRADE`  
Aliases:
  - `--upgrade`
  - `--update`

### `--version`
Show the version number and exit  

## Modes:

### `--message COMMAND`
Specify a single message to send the LLM, process reply then exit (disables chat mode)  
Environment variable: `AIDER_MESSAGE`  
Aliases:
  - `--message COMMAND`
  - `--msg COMMAND`
  - `-m COMMAND`

### `--message-file MESSAGE_FILE`
Specify a file containing the message to send the LLM, process reply, then exit (disables chat mode)  
Environment variable: `AIDER_MESSAGE_FILE`  
Aliases:
  - `--message-file MESSAGE_FILE`
  - `-f MESSAGE_FILE`

### `--gui`
Run aider in your browser (default: False)  
Default: False  
Environment variable: `AIDER_GUI`  
Aliases:
  - `--gui`
  - `--no-gui`
  - `--browser`
  - `--no-browser`

### `--copy-paste`
Enable automatic copy/paste of chat between aider and web UI (default: False)  
Default: False  
Environment variable: `AIDER_COPY_PASTE`  
Aliases:
  - `--copy-paste`
  - `--no-copy-paste`

### `--apply FILE`
Apply the changes from the given file instead of running the chat (debug)  
Environment variable: `AIDER_APPLY`  

### `--apply-clipboard-edits`
Apply clipboard contents as edits using the main model's editor format  
Default: False  
Environment variable: `AIDER_APPLY_CLIPBOARD_EDITS`  

### `--exit`
Do all startup activities then exit before accepting user input (debug)  
Default: False  
Environment variable: `AIDER_EXIT`  

### `--show-repo-map`
Print the repo map and exit (debug)  
Default: False  
Environment variable: `AIDER_SHOW_REPO_MAP`  

### `--show-prompts`
Print the system prompts and exit (debug)  
Default: False  
Environment variable: `AIDER_SHOW_PROMPTS`  

## Voice settings:

### `--voice-format VOICE_FORMAT`
Audio format for voice recording (default: wav). webm and mp3 require ffmpeg  
Default: wav  
Environment variable: `AIDER_VOICE_FORMAT`  

### `--voice-language VOICE_LANGUAGE`
Specify the language for voice using ISO 639-1 code (default: auto)  
Default: en  
Environment variable: `AIDER_VOICE_LANGUAGE`  

### `--voice-input-device VOICE_INPUT_DEVICE`
Specify the input device name for voice recording  
Environment variable: `AIDER_VOICE_INPUT_DEVICE`  

## Other settings:

### `--disable-playwright`
Never prompt for or attempt to install Playwright for web scraping (default: False).  
Default: False  
Environment variable: `AIDER_DISABLE_PLAYWRIGHT`  

### `--file FILE`
specify a file to edit (can be used multiple times)  
Environment variable: `AIDER_FILE`  

### `--read FILE`
specify a read-only file (can be used multiple times)  
Environment variable: `AIDER_READ`  

### `--vim`
Use VI editing mode in the terminal (default: False)  
Default: False  
Environment variable: `AIDER_VIM`  

### `--chat-language CHAT_LANGUAGE`
Specify the language to use in the chat (default: None, uses system settings)  
Environment variable: `AIDER_CHAT_LANGUAGE`  

### `--commit-language COMMIT_LANGUAGE`
Specify the language to use in the commit message (default: None, user language)  
Environment variable: `AIDER_COMMIT_LANGUAGE`  

### `--yes-always`
Always say yes to every confirmation  
Environment variable: `AIDER_YES_ALWAYS`  

### `--verbose`
Enable verbose output  
Default: False  
Environment variable: `AIDER_VERBOSE`  
Aliases:
  - `-v`
  - `--verbose`

### `--load LOAD_FILE`
Load and execute /commands from a file on launch  
Environment variable: `AIDER_LOAD`  

### `--encoding VALUE`
Specify the encoding for input and output (default: utf-8)  
Default: utf-8  
Environment variable: `AIDER_ENCODING`  

### `--line-endings VALUE`
Line endings to use when writing files (default: platform)  
Default: platform  
Environment variable: `AIDER_LINE_ENDINGS`  

### `--config CONFIG_FILE`
Specify the config file (default: search for .aider.conf.yml in git root, cwd or home directory)  
Aliases:
  - `-c CONFIG_FILE`
  - `--config CONFIG_FILE`

### `--env-file ENV_FILE`
Specify the .env file to load (default: .env in git root)  
Default: .env  
Environment variable: `AIDER_ENV_FILE`  

### `--suggest-shell-commands`
Enable/disable suggesting shell commands (default: True)  
Default: True  
Environment variable: `AIDER_SUGGEST_SHELL_COMMANDS`  
Aliases:
  - `--suggest-shell-commands`
  - `--no-suggest-shell-commands`

### `--fancy-input`
Enable/disable fancy input with history and completion (default: True)  
Default: True  
Environment variable: `AIDER_FANCY_INPUT`  
Aliases:
  - `--fancy-input`
  - `--no-fancy-input`

### `--multiline`
Enable/disable multi-line input mode with Meta-Enter to submit (default: False)  
Default: False  
Environment variable: `AIDER_MULTILINE`  
Aliases:
  - `--multiline`
  - `--no-multiline`

### `--notifications`
Enable/disable terminal bell notifications when LLM responses are ready (default: False)  
Default: False  
Environment variable: `AIDER_NOTIFICATIONS`  
Aliases:
  - `--notifications`
  - `--no-notifications`

### `--notifications-command COMMAND`
Specify a command to run for notifications instead of the terminal bell. If not specified, a default command for your OS may be used.  
Environment variable: `AIDER_NOTIFICATIONS_COMMAND`  

### `--detect-urls`
Enable/disable detection and offering to add URLs to chat (default: True)  
Default: True  
Environment variable: `AIDER_DETECT_URLS`  
Aliases:
  - `--detect-urls`
  - `--no-detect-urls`

### `--editor VALUE`
Specify which editor to use for the /editor command  
Environment variable: `AIDER_EDITOR`  

### `--shell-completions SHELL`
Print shell completion script for the specified SHELL and exit. Supported shells: bash, tcsh, zsh. Example: aider --shell-completions bash  
Environment variable: `AIDER_SHELL_COMPLETIONS`  

## Deprecated model settings:

### `--opus`
Use claude-3-opus-20240229 model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_OPUS`  

### `--sonnet`
Use anthropic/claude-3-7-sonnet-20250219 model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_SONNET`  

### `--haiku`
Use claude-3-5-haiku-20241022 model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_HAIKU`  

### `--4`
Use gpt-4-0613 model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_4`  
Aliases:
  - `--4`
  - `-4`

### `--4o`
Use gpt-4o model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_4O`  

### `--mini`
Use gpt-4o-mini model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_MINI`  

### `--4-turbo`
Use gpt-4-1106-preview model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_4_TURBO`  

### `--35turbo`
Use gpt-3.5-turbo model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_35TURBO`  
Aliases:
  - `--35turbo`
  - `--35-turbo`
  - `--3`
  - `-3`

### `--deepseek`
Use deepseek/deepseek-chat model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_DEEPSEEK`  

### `--o1-mini`
Use o1-mini model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_O1_MINI`  

### `--o1-preview`
Use o1-preview model for the main chat (deprecated, use --model)  
Default: False  
Environment variable: `AIDER_O1_PREVIEW`  
<!--[[[end]]]-->