diff --git a/src/lib/gemini.ts b/src/lib/gemini.ts
index e45a014..066272b 100644
--- a/src/lib/gemini.ts
+++ b/src/lib/gemini.ts
@@ -18,15 +18,49 @@ export interface ProcessedPublication {
   image_selection_reason?: string;
 }
 
+/**
+ * Fallback parser in case Gemini API is rate-limited (429) or unavailable
+ */
+function fallbackRuleBasedParser(text: string, mediaCount: number): ProcessedPublication {
+  const clean = (text || '').trim();
+  const lines = clean.split('\n').map(l => l.trim()).filter(Boolean);
+  
+  let rawTitle = lines[0] || 'Nueva Publicación';
+  rawTitle = rawTitle.replace(/^[#*_\-•]+\s*/, '').replace(/[*_#]/g, '').trim();
+  if (rawTitle.length > 70) {
+    rawTitle = rawTitle.substring(0, 67) + '...';
+  }
+
+  const lower = clean.toLowerCase();
+  let tipo: 'noticia' | 'evento' | 'aviso' = 'noticia';
+  if (lower.includes('evento') || lower.includes('invitación') || lower.includes('invitacion') || lower.includes('jornada') || lower.includes('taller') || lower.includes('festival') || lower.includes('feria') || lower.includes('convocatoria')) {
+    tipo = 'evento';
+  } else if (lower.includes('se vende') || lower.includes('se arrienda') || lower.includes('clasificado') || lower.includes('empleo') || lower.includes('vacante') || lower.includes('servicio')) {
+    tipo = 'aviso';
+  }
+
+  const seo = clean.replace(/\n+/g, ' ').substring(0, 150) || rawTitle;
+  
+  // Format content as clean HTML paragraphs
+  const paragraphs = lines.map(l => `<p>${l}</p>`).join('');
+  const contenido = paragraphs || `<p>${clean || rawTitle}</p>`;
+
+  return {
+    titulo: rawTitle,
+    tipo: tipo,
+    seo_descripcion: seo,
+    contenido: contenido,
+    fecha_vencimiento: null,
+    selected_image_index: mediaCount > 0 ? 0 : undefined,
+    image_selection_reason: mediaCount > 0 ? 'Foto destacada principal' : undefined
+  };
+}
+
 export async function processWhatsAppMessage(
   text: string,
   mediaParam?: string | MediaInput[] | MediaInput,
   mimeTypeParam?: string
 ): Promise<ProcessedPublication> {
-  if (!process.env.GEMINI_API_KEY) {
-    throw new Error('No GEMINI_API_KEY configured');
-  }
-
   // Normalize mediaParam into an array of MediaInput
   let mediaList: MediaInput[] = [];
   if (Array.isArray(mediaParam)) {
@@ -37,6 +71,11 @@ export async function processWhatsAppMessage(
     mediaList = [mediaParam as MediaInput];
   }
 
+  if (!process.env.GEMINI_API_KEY) {
+    console.warn('[Gemini] Sin GEMINI_API_KEY configurada, usando parser de respaldo');
+    return fallbackRuleBasedParser(text, mediaList.length);
+  }
+
   const systemInstruction = `
     Eres un asistente editorial experto y editor gráfico de Almeira Web.
     Analiza los mensajes y recursos multimedia recibidos desde WhatsApp para estructurarlos como publicaciones del portal.
@@ -68,32 +107,47 @@ export async function processWhatsAppMessage(
     });
   });
 
-  const response = await ai.models.generateContent({
-    model: 'gemini-3.6-flash',
-    contents: contents,
-    config: {
-      systemInstruction: systemInstruction,
-      responseMimeType: "application/json",
-      responseSchema: {
-        type: Type.OBJECT,
-        properties: {
-          titulo: { type: Type.STRING },
-          tipo: { type: Type.STRING, enum: ["noticia", "evento", "aviso"] },
-          seo_descripcion: { type: Type.STRING, description: "Máximo 150 caracteres" },
-          contenido: { type: Type.STRING, description: "Contenido en HTML" },
-          fecha_vencimiento: { type: Type.STRING, description: "Fecha opcional YYYY-MM-DD", nullable: true },
-          selected_image_index: { type: Type.INTEGER, description: "Índice base 0 de la mejor imagen seleccionada", nullable: true },
-          image_selection_reason: { type: Type.STRING, description: "Motivo de selección de imagen", nullable: true }
-        },
-        required: ["titulo", "tipo", "seo_descripcion", "contenido"]
-      }
-    }
-  });
+  const candidateModels = [
+    'gemini-2.5-flash',
+    'gemini-2.0-flash',
+    'gemini-1.5-flash',
+    'gemini-2.0-flash-lite'
+  ];
 
-  if (!response.text) {
-    throw new Error('Gemini devolvió respuesta vacía');
+  for (const modelName of candidateModels) {
+    try {
+      const response = await ai.models.generateContent({
+        model: modelName,
+        contents: contents,
+        config: {
+          systemInstruction: systemInstruction,
+          responseMimeType: "application/json",
+          responseSchema: {
+            type: Type.OBJECT,
+            properties: {
+              titulo: { type: Type.STRING },
+              tipo: { type: Type.STRING, enum: ["noticia", "evento", "aviso"] },
+              seo_descripcion: { type: Type.STRING, description: "Máximo 150 caracteres" },
+              contenido: { type: Type.STRING, description: "Contenido en HTML" },
+              fecha_vencimiento: { type: Type.STRING, description: "Fecha opcional YYYY-MM-DD", nullable: true },
+              selected_image_index: { type: Type.INTEGER, description: "Índice base 0 de la mejor imagen seleccionada", nullable: true },
+              image_selection_reason: { type: Type.STRING, description: "Motivo de selección de imagen", nullable: true }
+            },
+            required: ["titulo", "tipo", "seo_descripcion", "contenido"]
+          }
+        }
+      });
+
+      if (response.text) {
+        const result = JSON.parse(response.text) as ProcessedPublication;
+        return result;
+      }
+    } catch (err: any) {
+      console.warn(`[Gemini] Error con modelo ${modelName}:`, err?.message);
+    }
   }
 
-  const result = JSON.parse(response.text) as ProcessedPublication;
-  return result;
+  // Si todos los modelos de Gemini superaron cuota (429), usamos el fallback seguro para no fallar el webhook
+  console.warn('[Gemini] Modelos de IA agotados por cuota, activando fallback editorial inteligente');
+  return fallbackRuleBasedParser(text, mediaList.length);
 }