diff --git a/backend/app/main.py b/backend/app/main.py
index 29c6eb4..1770124 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -276,7 +276,7 @@ def extract_pdf_text_smart(pdf_content: bytes, max_chars: int = None) -> dict:
         }
 
 
-BACKEND_VERSION = "1.2.1"
+BACKEND_VERSION = "1.2.2"
 app = FastAPI(title="Checklist Inteligente API", version=BACKEND_VERSION)
 
 # S3/MinIO configuration
@@ -3211,6 +3211,53 @@ NOTA:
             
             ai_response = response.choices[0].message.content
             
+        elif ai_config.provider == "anthropic":
+            import anthropic
+            
+            client = anthropic.Anthropic(api_key=ai_config.api_key)
+            
+            if is_pdf:
+                # Para PDF, solo texto
+                response = client.messages.create(
+                    model=ai_config.model_name or "claude-sonnet-4-5",
+                    max_tokens=500,
+                    system=system_prompt,
+                    messages=[
+                        {
+                            "role": "user",
+                            "content": f"{user_message}\n\n--- CONTENIDO DEL DOCUMENTO PDF ({len(pdf_text)} caracteres) ---\n{pdf_text[:100000]}"
+                        }
+                    ]
+                )
+            else:
+                # Para imagen, usar vision
+                response = client.messages.create(
+                    model=ai_config.model_name or "claude-sonnet-4-5",
+                    max_tokens=500,
+                    system=system_prompt,
+                    messages=[
+                        {
+                            "role": "user",
+                            "content": [
+                                {
+                                    "type": "text",
+                                    "text": user_message
+                                },
+                                {
+                                    "type": "image",
+                                    "source": {
+                                        "type": "base64",
+                                        "media_type": "image/jpeg",
+                                        "data": image_b64
+                                    }
+                                }
+                            ]
+                        }
+                    ]
+                )
+            
+            ai_response = response.content[0].text
+            
         elif ai_config.provider == "gemini":
             import google.generativeai as genai
             from PIL import Image
diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index 30fffe1..a8f01d9 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -1953,23 +1953,24 @@ function QuestionsManagerModal({ checklist, onClose }) {
                         {formData.photo_requirement === 'required' && '• El mecánico DEBE adjuntar al menos 1 archivo'}
                       </p>
                     </div>
-                    <div>
-                      <label className="block text-sm font-medium text-gray-700 mb-2">
-                        Máx. archivos
-                      </label>
-                      <input
-                        type="number"
-                        min="1"
-                        max="10"
-                        value={formData.max_photos}
-                        onChange={(e) => setFormData({ ...formData, max_photos: parseInt(e.target.value) })}
-                        className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500"
-                        disabled={formData.photo_requirement === 'none'}
-                      />
-                      <p className="text-xs text-gray-500 mt-1">
-                        Cantidad máxima de fotos/PDFs permitidos
-                      </p>
-                    </div>
+                    {formData.photo_requirement !== 'none' && (
+                      <div>
+                        <label className="block text-sm font-medium text-gray-700 mb-2">
+                          Máx. archivos
+                        </label>
+                        <input
+                          type="number"
+                          min="1"
+                          max="10"
+                          value={formData.max_photos}
+                          onChange={(e) => setFormData({ ...formData, max_photos: parseInt(e.target.value) })}
+                          className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500"
+                        />
+                        <p className="text-xs text-gray-500 mt-1">
+                          Cantidad máxima de fotos/PDFs permitidos
+                        </p>
+                      </div>
+                    )}
                   </div>
                 </div>