diff --git a/forecasting_tools/agents_and_tools/question_generators/question_decomposer.py b/forecasting_tools/agents_and_tools/question_generators/question_decomposer.py
index b4be4885..905c50ff 100644
--- a/forecasting_tools/agents_and_tools/question_generators/question_decomposer.py
+++ b/forecasting_tools/agents_and_tools/question_generators/question_decomposer.py
@@ -170,10 +170,12 @@ async def decompose_into_questions_fast(
         related_research: str | None,
         additional_context: str | None,
         number_of_questions: int = 5,
-        model: str | GeneralLlm = GeneralLlm.search_context_model(
-            "openrouter/perplexity/sonar"
-        ),
+        model: str | GeneralLlm | None = None,
     ) -> DecompositionResult:
+        if model is None:
+            model = GeneralLlm.search_context_model(
+                "openrouter/perplexity/sonar"
+            )
         llm = GeneralLlm.to_llm(model)
 
         prompt = clean_indents(