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OpenAI's new GPT-5.5-Cyber tops Claude Mythos 5 in vulnerability benchmark

OpenAI is rolling out the full, limited-release version of GPT-5.5-Cyber—a specialized AI model that outperforms its predecessors and Claude Mythos 5 in security benchmarks like CyberGym.

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OpenAI's new GPT-5.5-Cyber tops Claude Mythos 5 in vulnerability benchmark

OpenAI released GPT-5.5-Cyber (85.6% CyberGym vs Claude Mythos 5's 83.8%) with Codex Security validated on 30M+ commits. For enterprises at scale, the bottleneck is patching—agentic reasoning automates vulnerability validation and patch generation, integrating SARIF/CodeQL to compress discovery-to-fix cycles.

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OpenAI's new GPT-5.5-Cyber tops Claude Mythos 5 in vulnerability benchmark

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OpenAI's new GPT-5.5-Cyber tops Claude Mythos 5 in vulnerability benchmark

Timeline cronologica

OpenAI Launches Full-Scale Effort to Patch Open-Source Bugs as It Takes on Anthropic’s Mythos

OpenAI launches Patch the Planet initiative to enhance open source security

How OpenAI GPT 5.5 Cyber Beats Claude Mythos 5

OpenAI says new GPT-5.5-Cyber outperforms Anthropic's Mythos on cybersecurity benchmark

OpenAI Expands Daybreak With GPT-5.5-Cyber to Help Defenders Patch Security Flaws

OpenAI Says AI Broke Cybersecurity — Now It Wants AI To Fix It

OpenAI expands Daybreak with Patch the Planet and full GPT-5.5-Cyber release - SiliconANGLE

OpenAI Says AI Broke Cybersecurity — Now It Wants AI To Fix It

OpenAI expands Daybreak with Patch the Planet and full GPT-5.5-Cyber release - SiliconANGLE

OpenAI: Yoo-hoo, look over here, we do that security stuff too!

OpenAI Expands Daybreak With GPT-5.5-Cyber to Help Defenders Patch Security Flaws

OpenAI's new GPT-5.5-Cyber tops Claude Mythos 5 in vulnerability benchmark

OpenAI launches open-source bug-fixing initiative

Claude Mythos 5: How OpenAI GPT 5.5 Cyber Beats Claude Mythos 5

How OpenAI GPT 5.5 Cyber Beats Claude Mythos 5

Taking on Mythos: OpenAI rolls out cyberdefence model Daybreak to speed up software security fixes - The Economic Times

OpenAI's Patch the Planet Bets the Bottleneck Is Patching, Not Finding

OpenAI says new GPT-5.5-Cyber outperforms Anthropic's Mythos on cybersecurity benchmark

GPT-5.5-Cyber schlägt Mythos: Update für Sicherheitsmodell von OpenAI

OpenAI's GPT-5.5 Cyber AI Beats Anthropic's Banned Mythos Model—And Nobody's Shutting It Down - Decrypt

Sicherheitslücken finden: OpenAIs GPT-5.5-Cyber soll Anthropics Mythos 5 übertreffen | t3n

OpenAI rolls out cybersecurity models rivaling Anthropic's Mythos as White House stays quiet

OpenAI Daybreak si espande: GPT-5.5-Cyber supera Mythos e arriva Patch the Planet