diff --git a/GPTEL_SETUP.md b/GPTEL_SETUP.md
new file mode 100644
index 0000000..8adc7a4
--- /dev/null
+++ b/GPTEL_SETUP.md
@@ -0,0 +1,254 @@
+# gptel Configuration Guide
+
+## 🎉 What Was Configured
+
+Your Doom Emacs now has a comprehensive gptel setup with:
+
+### ✅ Installed Packages
+1. **gptel** - Main LLM client
+2. **gptel-quick** - Quick lookups in popup
+3. **gptel-extensions** - Extra utility functions
+4. **gptel-autocomplete** - Inline code completion
+
+### ✅ Configured Features
+- ✨ OpenRouter backend with multiple models (Gemini, Claude)
+- 📝 Org-mode as default (better for saving conversations)
+- ⌨️ Comprehensive keybindings under `SPC a` prefix
+- 🎨 5 task-specific presets (coder, explain, refactor, quick, docs)
+- 🤖 Auto-completion in programming modes
+- 🛠️ Custom helper functions for quick explanations and proofreading
+
+---
+
+## 🔐 IMPORTANT: Secure Your API Key
+
+**⚠️ WARNING**: Your OpenRouter API key is currently hardcoded in `ai.el`. This is a security risk!
+
+### Recommended Setup: Use auth-source
+
+1. **Create encrypted credentials file:**
+   ```bash
+   touch ~/.authinfo.gpg
+   chmod 600 ~/.authinfo.gpg
+   ```
+
+2. **Add your API key to `~/.authinfo.gpg`:**
+   ```
+   machine openrouter.ai login apikey password sk-or-v1-YOUR_KEY_HERE
+   ```
+
+   Emacs will prompt for a password to encrypt this file.
+
+3. **Update `~/.config/doom/ai.el`:**
+
+   Replace the `:key` line in the `gptel-make-openai` section:
+   ```elisp
+   ;; BEFORE (insecure):
+   :key "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"
+
+   ;; AFTER (secure):
+   :key (auth-source-pick-first-password :host "openrouter.ai")
+   ```
+
+4. **Reload Doom:**
+   ```bash
+   doom sync
+   ```
+
+---
+
+## ⌨️ Keybindings Reference
+
+All gptel commands are under `SPC a` (AI prefix):
+
+| Keybinding | Command | Description |
+|------------|---------|-------------|
+| `SPC a g` | `gptel` | Open gptel chat buffer |
+| `SPC a s` | `gptel-send` | Send prompt to LLM |
+| `SPC a m` | `gptel-menu` | Open transient menu (change model, backend, etc) |
+| `SPC a r` | `gptel-rewrite` | Rewrite selected region with AI |
+| `SPC a c` | `gptel-add` | Add region/buffer to context |
+| `SPC a f` | `gptel-add-file` | Add file to context |
+| `SPC a q` | `gptel-quick` | Quick lookup in popup (word/region) |
+| `SPC a l` | Load buffer into session | Send whole buffer as context |
+| `SPC a b` | Send whole buffer | Send entire buffer to AI |
+| `SPC a R` | Refactor region | Refactor selected code |
+| `SPC a e` | Quick explain | Explain selected code quickly |
+| `SPC a p` | Proofread text | Fix grammar/spelling in selection |
+
+### In gptel buffer:
+- `C-c RET` - Send message
+- `C-c C-c` - Open menu
+- `C-c C-k` - Abort request
+
+### Auto-completion (in programming modes):
+- `M-TAB` or `C-c TAB` - Trigger completion
+
+---
+
+## 🎨 Using Presets
+
+Presets let you switch AI behavior for specific tasks:
+
+1. Open gptel menu: `SPC a m` or `C-c C-c`
+2. Select "Preset" option
+3. Choose from:
+   - **coder** - Expert coding assistant (uses Claude Sonnet 4.5)
+   - **explain** - Explain code to beginners
+   - **refactor** - Code refactoring expert
+   - **quick** - Quick, concise answers (uses fast Gemini Flash)
+   - **docs** - Documentation writer
+
+Or use `C-u SPC a s` to adjust settings on-the-fly!
+
+---
+
+## 🚀 Quick Start Workflows
+
+### 1. Chat with AI
+```
+SPC a g          → Opens gptel buffer
+Type question    → Write your prompt
+C-c RET         → Send (or SPC a s)
+```
+
+### 2. Rewrite Code
+```
+1. Select code region (visual mode)
+2. SPC a r
+3. Type instruction: "Add error handling"
+4. Review changes and accept
+```
+
+### 3. Add Context (Multi-file awareness)
+```
+1. Open reference file
+2. SPC a c (adds buffer to context)
+3. Open gptel: SPC a g
+4. Now AI knows about the reference file!
+```
+
+### 4. Quick Explanations
+```
+1. Hover over word or select code
+2. SPC a q
+3. See explanation in popup!
+```
+
+### 5. Code Completion
+```
+Start typing code...
+M-TAB           → Shows AI completion as ghost text
+TAB             → Accept completion
+```
+
+---
+
+## 🏠 Local Models with Ollama (Optional)
+
+Want to run AI locally for privacy?
+
+1. **Install Ollama:**
+   ```bash
+   # Linux
+   curl -fsSL https://ollama.com/install.sh | sh
+
+   # Start Ollama
+   ollama serve
+   ```
+
+2. **Pull models:**
+   ```bash
+   ollama pull qwen2.5-coder:latest
+   ollama pull mistral:latest
+   ```
+
+3. **Uncomment Ollama config in `ai.el`:**
+
+   Look for the "Optional: Add Ollama" section around line 126 and uncomment:
+   ```elisp
+   (after! gptel
+     (gptel-make-ollama "Ollama"
+       :host "localhost:11434"
+       :stream t
+       :models '(qwen2.5-coder:latest
+                 mistral:latest
+                 llama3.2:latest)))
+   ```
+
+4. **To make Ollama default**, uncomment lines 136-141 as well
+
+5. **Reload:** `doom sync`
+
+6. **Switch backends:** `SPC a m` → Select "Backend" → Choose "Ollama"
+
+---
+
+## 🎯 Pro Tips
+
+1. **Save conversations**: gptel uses org-mode by default, so just save the buffer!
+
+2. **Switch models on-the-fly**: `C-u SPC a s` before sending
+
+3. **Context management**:
+   - Add files in Dired: Mark files → `SPC a c`
+   - Remove context: `SPC a m` → Manage context
+
+4. **Org-mode features**:
+   - Each heading can be a separate conversation branch
+   - Set properties: `M-x gptel-org-set-properties`
+   - Set topic: `M-x gptel-org-set-topic`
+
+5. **Custom instructions**: Use `SPC a r` on selected code and give specific instructions
+
+6. **Programmatic use**: See helper functions at bottom of `ai.el` for examples
+
+---
+
+## 📚 Next Steps
+
+1. **Secure your API key** (see section above)
+2. **Run:** `doom sync` to install packages
+3. **Restart Emacs**
+4. **Try:** `SPC a g` to start chatting!
+5. **Watch:** "Every LLM in Emacs, with gptel" video (17 min)
+
+---
+
+## 🐛 Troubleshooting
+
+### Packages not loading?
+```bash
+doom sync
+doom build
+```
+
+### Transient version error?
+```elisp
+;; Add to ai.el before gptel config:
+(setq package-install-upgrade-built-in t)
+```
+Then: `M-x package-install RET transient RET`
+
+### API key not working?
+- Check `~/.authinfo.gpg` format
+- Ensure proper encryption password
+- Test: `(auth-source-pick-first-password :host "openrouter.ai")`
+
+### Autocomplete not showing?
+- Enable manually: `M-x gptel-autocomplete-mode`
+- Check if in prog-mode buffer
+- May need specific model configuration
+
+---
+
+## 📖 Resources
+
+- [gptel GitHub](https://github.com/karthink/gptel)
+- [gptel Manual](https://gptel.org/manual.html)
+- [OpenRouter Docs](https://openrouter.ai/docs)
+- [Ollama Models](https://ollama.com/library)
+
+---
+
+**Enjoy your AI-powered Emacs! 🎉**
diff --git a/ai.el b/ai.el
index dad011b..f23104b 100644
--- a/ai.el
+++ b/ai.el
@@ -1,17 +1,171 @@
 ;;; ai.el -*- lexical-binding: t; -*-
 
-(setq gptel-model   'google/gemini-2.5-flash  ;; Default model
-      gptel-backend
-      (gptel-make-openai "OpenRouter"               ;Any name you want
-        :host "openrouter.ai"
-        :endpoint "/api/v1/chat/completions"
-        :stream t
-        :key "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"                   ;can be a function that returns the key
-        :models '(google/gemini-2.5-flash
-                  google/gemini-2.5-pro
-                  anthropic/claude-sonnet-4
-                  anthropic/claude-sonnet-4.5
-                  )))
+;;; ============================================================================
+;;; gptel Configuration
+;;; ============================================================================
+
+;; Core gptel setup
+(use-package! gptel
+  :config
+  ;; Default backend: OpenRouter
+  (setq gptel-model 'google/gemini-2.5-flash
+        gptel-backend
+        (gptel-make-openai "OpenRouter"
+          :host "openrouter.ai"
+          :endpoint "/api/v1/chat/completions"
+          :stream t
+          :key "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"
+          :models '(google/gemini-2.5-flash
+                    google/gemini-2.5-pro
+                    anthropic/claude-sonnet-4
+                    anthropic/claude-sonnet-4.5)))
+
+  ;; Use org-mode by default for better note-taking
+  (setq gptel-default-mode 'org-mode)
+
+  ;; Move cursor to end of response automatically
+  (add-hook 'gptel-post-response-functions 'gptel-end-of-response)
+
+  ;; Keybindings
+  (map! :leader
+        (:prefix ("a" . "AI")
+         :desc "gptel chat" "g" #'gptel
+         :desc "gptel send" "s" #'gptel-send
+         :desc "gptel menu" "m" #'gptel-menu
+         :desc "gptel rewrite" "r" #'gptel-rewrite
+         :desc "Add context" "c" #'gptel-add
+         :desc "Add file to context" "f" #'gptel-add-file))
+
+  ;; Additional keybindings in gptel buffer
+  (map! :map gptel-mode-map
+        "C-c RET" #'gptel-send
+        "C-c C-k" #'gptel-abort
+        "C-c C-c" #'gptel-menu))
+
+;; gptel presets for different tasks
+(after! gptel
+  ;; Coding assistant preset
+  (gptel-make-preset 'coder
+    :description "Expert coding assistant"
+    :backend "OpenRouter"
+    :model 'anthropic/claude-sonnet-4.5
+    :system "You are an expert coding assistant. Provide high-quality code solutions, refactorings, and explanations. Be concise but thorough. Include error handling and follow best practices.")
+
+  ;; Code explainer preset
+  (gptel-make-preset 'explain
+    :description "Explain code to beginners"
+    :system "Explain this code to a novice programmer. Use simple language and break down complex concepts.")
+
+  ;; Refactoring preset
+  (gptel-make-preset 'refactor
+    :description "Code refactoring expert"
+    :model 'anthropic/claude-sonnet-4.5
+    :system "You are a code refactoring expert. Improve code quality, readability, and performance while maintaining functionality. Explain your changes.")
+
+  ;; Quick answers preset
+  (gptel-make-preset 'quick
+    :description "Quick, concise answers"
+    :model 'google/gemini-2.5-flash
+    :system "Provide quick, concise answers. Be direct and to the point.")
+
+  ;; Documentation writer preset
+  (gptel-make-preset 'docs
+    :description "Documentation writer"
+    :system "Write clear, comprehensive documentation. Include examples and explain edge cases."))
+
+;;; ============================================================================
+;;; gptel-quick - Quick lookups and explanations
+;;; ============================================================================
+
+(use-package! gptel-quick
+  :after gptel
+  :config
+  ;; Include context from gptel-add if available
+  (setq gptel-quick-use-context t)
+
+  (map! :leader
+        (:prefix "a"
+         :desc "Quick lookup" "q" #'gptel-quick)))
+
+;;; ============================================================================
+;;; gptel-extensions - Extra utility functions
+;;; ============================================================================
+
+(use-package! gptel-extensions
+  :after gptel
+  :config
+  (map! :leader
+        (:prefix "a"
+         :desc "Load buffer into session" "l" #'gptel-extensions-load-buffer
+         :desc "Send whole buffer" "b" #'gptel-extensions-send-whole-buffer
+         :desc "Refactor region" "R" #'gptel-extensions-refactor)))
+
+;;; ============================================================================
+;;; gptel-autocomplete - Inline code completion
+;;; ============================================================================
+
+(use-package! gptel-autocomplete
+  :after gptel
+  :config
+  ;; Enable in programming modes
+  (add-hook 'prog-mode-hook #'gptel-autocomplete-mode)
+
+  ;; Configure keybindings for autocomplete
+  (map! :map gptel-autocomplete-mode-map
+        "M-TAB" #'gptel-autocomplete-complete
+        "C-c TAB" #'gptel-autocomplete-complete)
+
+  ;; Optional: Configure which model to use for completion
+  ;; (setq gptel-autocomplete-model 'google/gemini-2.5-flash)
+  )
+
+;;; ============================================================================
+;;; Optional: Add Ollama for local models (commented out by default)
+;;; ============================================================================
+
+;; Uncomment to add Ollama support for local models
+;; (after! gptel
+;;   (gptel-make-ollama "Ollama"
+;;     :host "localhost:11434"
+;;     :stream t
+;;     :models '(qwen2.5-coder:latest
+;;               mistral:latest
+;;               llama3.2:latest)))
+
+;; To make Ollama default, uncomment:
+;; (setq gptel-model 'qwen2.5-coder:latest
+;;       gptel-backend (gptel-make-ollama "Ollama"
+;;                       :host "localhost:11434"
+;;                       :stream t
+;;                       :models '(qwen2.5-coder:latest
+;;                                 mistral:latest)))
+
+;;; ============================================================================
+;;; Helper functions
+;;; ============================================================================
+
+(defun my/gptel-quick-explain-region ()
+  "Quickly explain selected code region."
+  (interactive)
+  (when (use-region-p)
+    (let ((code (buffer-substring-no-properties (region-beginning) (region-end))))
+      (gptel-request code
+        :system "Explain this code concisely in 2-3 sentences."
+        :callback (lambda (response info)
+                    (message "Explanation: %s" response))))))
+
+(defun my/gptel-proofread-region ()
+  "Proofread and improve selected text."
+  (interactive)
+  (when (use-region-p)
+    (gptel-rewrite-region (region-beginning) (region-end)
+      "Fix spelling, grammar, and improve clarity. Keep the same tone and style.")))
+
+;; Add keybindings for helper functions
+(map! :leader
+      (:prefix "a"
+       :desc "Quick explain" "e" #'my/gptel-quick-explain-region
+       :desc "Proofread text" "p" #'my/gptel-proofread-region))
 
 ;;; Claude Code Configuration
 
diff --git a/packages.el b/packages.el
index 904abb2..7eee863 100644
--- a/packages.el
+++ b/packages.el
@@ -3,8 +3,19 @@
 
 (package! super-save)
 
+;; gptel and extensions
 (package! gptel)
 
+;; gptel extensions
+(package! gptel-quick
+  :recipe (:host github :repo "karthink/gptel-quick"))
+
+(package! gptel-extensions
+  :recipe (:host github :repo "kamushadenes/gptel-extensions.el"))
+
+(package! gptel-autocomplete
+  :recipe (:host github :repo "JDNdeveloper/gptel-autocomplete"))
+
 (package! org-re-reveal)
 
 (package! copilot