le-gpt.el is a comprehensive Emacs package for interacting with large language models from OpenAI, Anthropic, and Deepseek. It's a feature-rich fork of gpt.el that adds project awareness, completion, region transform, and more to come.

The aim is to make sure Emacs stays up-to-date with modern GPT support, essentially aiming for a CursorAI for Emacs.

• 0.6.0: Add support for filtering buffer list via regex on content. Add optional le-gpt-consult-buffers function.
• 0.5.0: Add buffers as context; remove global context file support.
• 0.4.0: Add DeepSeek support

• Chat Interface: Create and manage multiple chat sessions with GPT. Use M-x le-gpt-chat to start a session. See usage for more details.

• Chat Buffer List: Display a list of all GPT chat buffers with M-x le-gpt-list-buffers. This feature allows you to manage and navigate through your chat buffers efficiently. See usage for more details.

• Completion at Point: Let GPT complete what you're currently writing. Use M-x le-gpt-complete-at-point to get suggestions based on your current cursor position. See usage for more details.

• Region Transformation: Select a region you want GPT to transform. Use M-x le-gpt-transform-region to transform the selected region using GPT. See usage for more details.

• Context: Select files from your project and buffers that GPT should use as context. You can select per-command context by running the above commands with a prefix argument (C-u). Context is used by chat, completion, and region transforms. See usage for more details.

Chat Interface	Completion at point

Context	Region Transformation

...and a screenshot for a small buffer list for completeness

You'll need Python packages for the API clients:

pip install openai anthropic jsonlines

You don't need to install all of them, but minimally openai or anthropic. For deepseek you'll need openai.

You'll also need API keys from OpenAI and/or Anthropic and/or Deepseek.

You'll also need markdown-mode for displaying the chat conversations nicely.

le-gpt is available via MELPA.

Here's how to install it with straight:

(use-package le-gpt
  :after evil
  :bind (("M-C-g" . le-gpt-chat)
         ("M-C-n" . le-gpt-complete-at-point)
         ("M-C-t" . le-gpt-transform-region)
         ;; if you use consult
         ("C-c C-s" . le-gpt-consult-buffers))
  :config
  ;; set default values as you wish
  (setq le-gpt-api-type 'anthropic)
  (setq le-gpt-model "claude-sonnet-4-20250514")
  (setq le-gpt-max-tokens 10000)
  
  (setq le-gpt-openai-key "xxx")
  (setq le-gpt-anthropic-key "xxx")
  (setq le-gpt-deepseek-key "xxx"))

If you're using evil, you'll want to add

(with-eval-after-load 'evil
    (evil-define-key 'normal le-gpt-buffer-list-mode-map
      (kbd "RET") #'le-gpt-buffer-list-open-buffer
      (kbd "d") #'le-gpt-buffer-list-mark-delete
      (kbd "u") #'le-gpt-buffer-list-unmark
      (kbd "x") #'le-gpt-buffer-list-execute
      (kbd "gr") #'le-gpt-buffer-list-refresh
      (kbd "/") #'le-gpt-buffer-list-filter
      (kbd "C-c C-s") #'le-gpt-consult-buffers
      (kbd "q") #'quit-window))

to get the above mentioned buffer list comands to work.

See all available customizations via M-x customize-group RET le-gpt.

Basic configuration:

;; API Keys
(setq le-gpt-openai-key "sk-...")
(setq le-gpt-anthropic-key "sk-ant-...")
(setq le-gpt-deepseek-key "sk-...")
;; Model Parameters (optional)
(setq le-gpt-api-type 'anthropic)
(setq le-gpt-model "claude-sonnet-4-20250514") ;; make sure this matches le-gpt-api-type
(setq le-gpt-max-tokens 10000)
(setq le-gpt-temperature 0)

You can add context for all of the below functionality by calling the functions with a prefix argument (C-u). You'll then be prompted to add project files and buffers as context. For convenience, you also have the option to use a previous context selection.

Start a chat session:

M-x le-gpt-chat

Key bindings in chat buffers include:

• C-c C-c: Send follow-up command
• C-c C-p: Toggle prefix visibility
• C-c C-b: Copy code block at point
• C-c C-t: Generate descriptive buffer name from its content
• C-c C-s: Save the current buffer

Display a list of all GPT buffers (created via le-gpt-chat):

M-x le-gpt-list-buffers

You can narrow down the list by regex'ing over the content pressing / followed by your regex. To reset the filter, hit C-c C-r.

Mark buffers you want to delete with d. Execute those deletions with x. Unmark with u. You can visit a buffer in the list by hitting RET and refresh the list with g r.

Generating buffer names with gpt via C-c C-t also works in the buffer list.

Save a chat when visiting a buffer (or in the buffer list) with C-c C-s (or M-x le-gpt-chat-save-buffer and M-x le-gpt-buffer-list-save-buffer, respectively). You can load previously saved chats with M-x le-gpt-chat-load-file.

Get completions based on your current cursor position:

M-x le-gpt-complete-at-point

Transform selection via:

M-x le-gpt-transform-region

Contributions are welcome! Please feel free to submit issues and pull requests on GitHub.

le-gpt.el is licensed under the MIT License. See LICENSE for details.