---
format: "aidr-story-markdown/v1"
id: "4b134cedffabe49d240ee681da3a506b8cd5c4ac96e1c0d275b5c44f280c5953"
canonical_url: "https://aidr.today/4b134ced?lang=en"
title: "Fuzzers vs. AI: Comparing Fuzzilli and BigSleep on JavaScript Engines"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-10-27T19:08:23.000Z"
category: "Research"
topics: ["google","llm"]
source_urls: ["https://projectzero.google/2026/10/fuzzing-v-AI.html","https://lobste.rs/s/rswyzt/fuzzers_vs_ai_comparing_fuzzilli"]
summary: "A Project Zero comparison found that BigSleep, an LLM-based bug finder, reported more vulnerabilities than Fuzzilli in Chrome’s V8 engine over six months, though both tools remain complementary."
---

# Fuzzers vs\. AI: Comparing Fuzzilli and BigSleep on JavaScript Engines

> [Open the canonical story](<https://aidr.today/4b134ced?lang=en>)

**Published:** 2026-10-27T19:08:23.000Z
**Category:** Research
**Topics:** google, llm

## Summary

A Project Zero comparison found that BigSleep, an LLM\-based bug finder, reported more vulnerabilities than Fuzzilli in Chrome’s V8 engine over six months, though both tools remain complementary\.

## Sources

- [Story source](<https://projectzero.google/2026/10/fuzzing-v-AI.html>)
- [Discussion](<https://lobste.rs/s/rswyzt/fuzzers_vs_ai_comparing_fuzzilli>)