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Default the listwise reranker to the larger model #80

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Merged
Aayam Bansal (aayambansal) merged 1 commit into from
Jul 30, 2026
Merged

Default the listwise reranker to the larger model #80

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10 changes: 8 additions & 2 deletions backend/synsc/config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -328,8 +328,14 @@ class SearchConfig(BaseModel):
),
)
listwise_rerank_model: str = Field(
default="gpt-4o-mini",
description="Chat model used for listwise reranking.",
default="gpt-4o",
description=(
"Chat model used for listwise reranking. Measured on the 220-case "
"held-out split, the larger model is better on every metric and "
"no slower end to end (MRR 0.309 vs 0.285, Recall@5 0.442 vs "
"0.419): it returns a usable ordering first time, where the "
"smaller model more often needs the omitted-candidate fallback."
),
)
listwise_rerank_k: int = Field(
default=20,
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