---
title: "Knowledge before Reasoning: EC-Reason-Bench, a Training-Free Diagnostic Benchmark for LLM Enzyme Classification — Stuff That Spins"
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date: "2026-07-30T04:00:00+00:00"
modified: "2026-07-30T12:04:03.949265+00:00"
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# Knowledge before Reasoning: EC-Reason-Bench, a Training-Free Diagnostic Benchmark for LLM Enzyme Classification

**Source:** Unknown  
**Published:** July 30, 2026  
**Original:** https://arxiv.org/abs/2607.26397  

## On this page

- [Overview](#overview)

<a id="overview"></a>

## Overview

arXiv:2607.26397v1 Announce Type: new Abstract: Enzyme function prediction is a hierarchical, knowledge-intensive form of protein function classification. Existing benchmarks expose an anomaly: general LLMs often get the coarse first level right, yet once asked for a complete EC number their accuracy at levels two through four drops to almost zero, while specialized models and tools stay usable. We propose EC-Reason-Bench, a training-free, diagnostic evaluation protocol built to answer two quest

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