diff --git a/components/chat-input.tsx b/components/chat-input.tsx
index b58a34a..e59dc32 100644
--- a/components/chat-input.tsx
+++ b/components/chat-input.tsx
@@ -45,6 +45,12 @@ export function ChatInput({
     const [isDragging, setIsDragging] = useState(false);
     const [showClearDialog, setShowClearDialog] = useState(false);
 
+    // Debug: Log status changes
+    const isDisabled = status === "streaming" || status === "submitted";
+    useEffect(() => {
+        console.log('[ChatInput] Status changed to:', status, '| Input disabled:', isDisabled);
+    }, [status, isDisabled]);
+
     // Auto-resize textarea based on content
     const adjustTextareaHeight = useCallback(() => {
         const textarea = textareaRef.current;
@@ -63,7 +69,7 @@ export function ChatInput({
         if ((e.metaKey || e.ctrlKey) && e.key === "Enter") {
             e.preventDefault();
             const form = e.currentTarget.closest("form");
-            if (form && input.trim() && status !== "streaming") {
+            if (form && input.trim() && !isDisabled) {
                 form.requestSubmit();
             }
         }
@@ -71,7 +77,7 @@ export function ChatInput({
 
     // Handle clipboard paste
     const handlePaste = async (e: React.ClipboardEvent) => {
-        if (status === "streaming") return;
+        if (isDisabled) return;
 
         const items = e.clipboardData.items;
         const imageItems = Array.from(items).filter((item) =>
@@ -140,7 +146,7 @@ export function ChatInput({
         e.stopPropagation();
         setIsDragging(false);
 
-        if (status === "streaming") return;
+        if (isDisabled) return;
 
         const droppedFiles = e.dataTransfer.files;
 
@@ -183,7 +189,7 @@ export function ChatInput({
                 placeholder="Describe what changes you want to make to the diagram
                 or upload(paste) an image to replicate a diagram.
                  (Press Cmd/Ctrl + Enter to send)"
-                disabled={status === "streaming"}
+                disabled={isDisabled}
                 aria-label="Chat input"
                 className="min-h-[80px] resize-none transition-all duration-200 px-1 py-0"
             />
@@ -220,7 +226,7 @@ export function ChatInput({
                         size="icon"
                         onClick={() => onToggleHistory(true)}
                         disabled={
-                            status === "streaming" ||
+                            isDisabled ||
                             diagramHistory.length === 0
                         }
                         title="Diagram History"
@@ -234,7 +240,7 @@ export function ChatInput({
                         variant="outline"
                         size="icon"
                         onClick={triggerFileInput}
-                        disabled={status === "streaming"}
+                        disabled={isDisabled}
                         title="Upload image"
                     >
                         <ImageIcon className="h-4 w-4" />
@@ -247,21 +253,21 @@ export function ChatInput({
                         onChange={handleFileChange}
                         accept="image/*"
                         multiple
-                        disabled={status === "streaming"}
+                        disabled={isDisabled}
                     />
                 </div>
 
                 <Button
                     type="submit"
-                    disabled={status === "streaming" || !input.trim()}
+                    disabled={isDisabled || !input.trim()}
                     className="transition-opacity"
                     aria-label={
-                        status === "streaming"
+                        isDisabled
                             ? "Sending message..."
                             : "Send message"
                     }
                 >
-                    {status === "streaming" ? (
+                    {isDisabled ? (
                         <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                     ) : (
                         <Send className="mr-2 h-4 w-4" />
diff --git a/components/chat-panel.tsx b/components/chat-panel.tsx
index 8804f0a..a8708e5 100644
--- a/components/chat-panel.tsx
+++ b/components/chat-panel.tsx
@@ -133,9 +133,15 @@ Please retry with an adjusted search pattern or use display_diagram if retries a
         }
     }, [messages]);
 
+    // Debug: Log status changes
+    useEffect(() => {
+        console.log('[ChatPanel] Status changed to:', status);
+    }, [status]);
+
     const onFormSubmit = async (e: React.FormEvent<HTMLFormElement>) => {
         e.preventDefault();
-        if (input.trim() && status !== "streaming") {
+        const isProcessing = status === "streaming" || status === "submitted";
+        if (input.trim() && !isProcessing) {
             try {
                 // Fetch chart data before sending message
                 let chartXml = await onFetchChart();
diff --git a/env.example b/env.example
index 0c85cfb..f6fb271 100644
--- a/env.example
+++ b/env.example
@@ -1,83 +1,34 @@
 # AI Provider Configuration
-# Choose your AI provider and model
-
 # AI_PROVIDER: Which provider to use
-# Options: bedrock, openai, anthropic, google, azure, ollama
+# Options: bedrock, openai, anthropic, google, azure, ollama, openrouter
 # Default: bedrock
 AI_PROVIDER=bedrock
 
 # AI_MODEL: The model ID for your chosen provider (REQUIRED)
-# See examples below for each provider
 AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
 
-# ===========================================
 # AWS Bedrock Configuration
-# ===========================================
 # AWS_REGION=us-east-1
 # AWS_ACCESS_KEY_ID=your-access-key-id
 # AWS_SECRET_ACCESS_KEY=your-secret-access-key
 
-# Popular Bedrock Models (Claude via Bedrock):
-# - global.anthropic.claude-sonnet-4-5-20250929-v1:0 (Latest Claude Sonnet 4.5)
-# - anthropic.claude-sonnet-4-20250514-v1:0 (Claude Sonnet 4)
-# - anthropic.claude-3-7-sonnet-20250219-v3:0 (Claude 3.7 Sonnet)
-# - anthropic.claude-3-5-haiku-20241022-v1:0 (Claude 3.5 Haiku)
-
-# ===========================================
 # OpenAI Configuration
-# ===========================================
 # OPENAI_API_KEY=sk-...
 # OPENAI_ORGANIZATION=org-...  # Optional
 # OPENAI_PROJECT=proj_...      # Optional
 
-# Popular OpenAI Models:
-# - gpt-5 (GPT-5)
-# - gpt-4o (GPT-4 Optimized)
-# - gpt-4-turbo (GPT-4 Turbo)
-# - o1 (Reasoning model)
-# - o3 (Reasoning model)
-# - o4 (Reasoning model)
-
-# ===========================================
 # Anthropic (Direct) Configuration
-# ===========================================
 # ANTHROPIC_API_KEY=sk-ant-...
 
-# Popular Anthropic Models:
-# - claude-sonnet-4-5 (Latest Claude Sonnet 4.5)
-# - claude-haiku-4-5 (Claude Haiku 4.5)
-# - claude-opus-4-1 (Claude Opus 4.1)
-# - claude-3-7-sonnet-latest (Claude 3.7 Sonnet)
-# - claude-3-5-haiku-latest (Claude 3.5 Haiku)
-
-# ===========================================
 # Google Generative AI Configuration
-# ===========================================
 # GOOGLE_GENERATIVE_AI_API_KEY=...
 
-# Popular Google Models:
-# - gemini-2.5-pro (Gemini 2.5 Pro)
-# - gemini-2.5-flash (Gemini 2.5 Flash)
-# - gemini-2.0-flash (Gemini 2.0 Flash)
-# - gemini-1.5-pro (Gemini 1.5 Pro)
-# - gemini-1.5-flash (Gemini 1.5 Flash)
-# - gemini-1.5-flash-8b (Gemini 1.5 Flash 8B)
-
-# ===========================================
 # Azure OpenAI Configuration
-# ===========================================
 # AZURE_RESOURCE_NAME=your-resource-name
 # AZURE_API_KEY=...
 
-# Azure Model Configuration:
-# Use your deployment name (not the model ID)
-# Example: if you deployed GPT-4 as "my-gpt4-deployment"
-# AI_MODEL=my-gpt4-deployment
-
-# ===========================================
 # Ollama (Local) Configuration
-# ===========================================
 # OLLAMA_BASE_URL=http://localhost:11434/api  # Optional, defaults to localhost
 
-# IMPORTANT: This app requires models that support tool calling (v2 specification)
-# Note: Models must be installed locally with `ollama pull <model-name>`
+# OpenRouter Configuration
+# OPENROUTER_API_KEY=sk-or-v1-...
diff --git a/lib/ai-providers.ts b/lib/ai-providers.ts
index 3b817db..d3e9692 100644
--- a/lib/ai-providers.ts
+++ b/lib/ai-providers.ts
@@ -4,6 +4,7 @@ import { anthropic } from '@ai-sdk/anthropic';
 import { google } from '@ai-sdk/google';
 import { azure } from '@ai-sdk/azure';
 import { ollama } from 'ollama-ai-provider-v2';
+import { createOpenRouter } from '@openrouter/ai-sdk-provider';
 
 export type ProviderName =
   | 'bedrock'
@@ -11,7 +12,8 @@ export type ProviderName =
   | 'anthropic'
   | 'google'
   | 'azure'
-  | 'ollama';
+  | 'ollama'
+  | 'openrouter';
 
 interface ModelConfig {
   model: any;
@@ -38,6 +40,7 @@ function validateProviderCredentials(provider: ProviderName): void {
     google: 'GOOGLE_GENERATIVE_AI_API_KEY',
     azure: 'AZURE_API_KEY',
     ollama: null, // No credentials needed for local Ollama
+    openrouter: 'OPENROUTER_API_KEY',
   };
 
   const requiredVar = requiredEnvVars[provider];
@@ -53,7 +56,7 @@ function validateProviderCredentials(provider: ProviderName): void {
  * Get the AI model based on environment variables
  *
  * Environment variables:
- * - AI_PROVIDER: The provider to use (bedrock, openai, anthropic, google, azure, ollama)
+ * - AI_PROVIDER: The provider to use (bedrock, openai, anthropic, google, azure, ollama, openrouter)
  * - AI_MODEL: The model ID/name for the selected provider
  *
  * Provider-specific env vars:
@@ -63,6 +66,7 @@ function validateProviderCredentials(provider: ProviderName): void {
  * - AZURE_RESOURCE_NAME, AZURE_API_KEY: Azure OpenAI credentials
  * - AWS_REGION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY: AWS Bedrock credentials
  * - OLLAMA_BASE_URL: Ollama server URL (optional, defaults to http://localhost:11434)
+ * - OPENROUTER_API_KEY: OpenRouter API key
  */
 export function getAIModel(): ModelConfig {
   const provider = (process.env.AI_PROVIDER || 'bedrock') as ProviderName;
@@ -114,9 +118,16 @@ export function getAIModel(): ModelConfig {
       model = ollama(modelId);
       break;
 
+    case 'openrouter':
+      const openrouter = createOpenRouter({
+        apiKey: process.env.OPENROUTER_API_KEY,
+      });
+      model = openrouter(modelId);
+      break;
+
     default:
       throw new Error(
-        `Unknown AI provider: ${provider}. Supported providers: bedrock, openai, anthropic, google, azure, ollama`
+        `Unknown AI provider: ${provider}. Supported providers: bedrock, openai, anthropic, google, azure, ollama, openrouter`
       );
   }
 
diff --git a/package-lock.json b/package-lock.json
index ece0c63..cf85d78 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,7 @@
                 "@ai-sdk/google": "^2.0.0",
                 "@ai-sdk/openai": "^2.0.19",
                 "@ai-sdk/react": "^2.0.22",
+                "@openrouter/ai-sdk-provider": "^1.2.3",
                 "@radix-ui/react-dialog": "^1.1.6",
                 "@radix-ui/react-scroll-area": "^1.2.3",
                 "@radix-ui/react-slot": "^1.1.2",
@@ -1113,6 +1114,47 @@
                 "node": ">= 10"
             }
         },
+        "node_modules/@openrouter/ai-sdk-provider": {
+            "version": "1.2.3",
+            "resolved": "https://registry.npmjs.org/@openrouter/ai-sdk-provider/-/ai-sdk-provider-1.2.3.tgz",
+            "integrity": "sha512-a6Nc8dPRHakRH9966YJ/HZJhLOds7DuPTscNZDoAr+Aw+tEFUlacSJMvb/b3gukn74mgbuaJRji9YOn62ipfVg==",
+            "license": "Apache-2.0",
+            "dependencies": {
+                "@openrouter/sdk": "^0.1.8"
+            },
+            "engines": {
+                "node": ">=18"
+            },
+            "peerDependencies": {
+                "ai": "^5.0.0",
+                "zod": "^3.24.1 || ^v4"
+            }
+        },
+        "node_modules/@openrouter/sdk": {
+            "version": "0.1.11",
+            "resolved": "https://registry.npmjs.org/@openrouter/sdk/-/sdk-0.1.11.tgz",
+            "integrity": "sha512-OuPc8qqidL/PUM8+9WgrOfSR9+b6rKIWiezGcUJ54iPTdh+Gye5Qjut6hrLWlOCMZE7Z853gN90r1ft4iChj7Q==",
+            "license": "Apache-2.0",
+            "dependencies": {
+                "zod": "^3.25.0 || ^4.0.0"
+            },
+            "peerDependencies": {
+                "@tanstack/react-query": "^5",
+                "react": "^18 || ^19",
+                "react-dom": "^18 || ^19"
+            },
+            "peerDependenciesMeta": {
+                "@tanstack/react-query": {
+                    "optional": true
+                },
+                "react": {
+                    "optional": true
+                },
+                "react-dom": {
+                    "optional": true
+                }
+            }
+        },
         "node_modules/@opentelemetry/api": {
             "version": "1.9.0",
             "resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.9.0.tgz",
diff --git a/package.json b/package.json
index c698651..2d59c6c 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
         "@ai-sdk/google": "^2.0.0",
         "@ai-sdk/openai": "^2.0.19",
         "@ai-sdk/react": "^2.0.22",
+        "@openrouter/ai-sdk-provider": "^1.2.3",
         "@radix-ui/react-dialog": "^1.1.6",
         "@radix-ui/react-scroll-area": "^1.2.3",
         "@radix-ui/react-slot": "^1.1.2",