diff --git a/src/generator/generator.py b/src/generator/generator.py
index d759b0a..5c3236a 100644
--- a/src/generator/generator.py
+++ b/src/generator/generator.py
@@ -670,6 +670,15 @@ async def generate_comparison(
     if not settings.anthropic_api_key:
         raise ValueError("Claude API key required for comparison")
 
+    def _truncate(text: str, max_words: int = 3000) -> str:
+        words = text.split()
+        if len(words) > max_words:
+            return " ".join(words[:max_words]) + "\n\n[... contenido adicional truncado ...]"
+        return text
+
+    context_a = _truncate(context_a)
+    context_b = _truncate(context_b)
+
     prompt = (
         f'Eres un analista experto. Compara en profundidad estos dos temas:\n'
         f'TEMA A: "{topic_a}"\n'