---
id: 5162
title: "GPT-5.5 and XBOW: A Step Change in Autonomous Application Security"
source_domain: xbow.com
source_url: "https://xbow.com/blog/gpt-5-5-and-xbow-a-step-change-in-autonomous-application-security"
published_at: "2026-06-03T12:00:00Z"
tags: ["ai-security", "agentic-ai", "appsec", "benchmark", "vulnerability-discovery", "gpt-5-5", "autonomous-security"]
phying_url: "https://phying.com/item/5162"
lang: en
---

# GPT-5.5 and XBOW: A Step Change in Autonomous Application Security

## Summary

XBOW announces GPT-5.5 in its platform: it rivals Mythos for vulnerability discovery while cutting missed vulnerabilities 75% versus GPT-5 and 44% versus Opus 4.6 in benchmarks.

## Intelligence Metadata

- **Sources:** xbow.com
- **Published:** 2026-06-03T12:00:00Z
- **Original:** https://xbow.com/blog/gpt-5-5-and-xbow-a-step-change-in-autonomous-application-security
- **Phying News:** https://phying.com/item/5162