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OpenAI Daybreak expands with GPT-5.5-Cyber and Codex Security patch automation

Security Tool/Service
First reported
Last updated
Happening score
H score 14
1 unique sources, 1 articles

Summary

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OpenAI expanded Daybreak with a full release of GPT-5.5-Cyber and updated Codex Security, widening AI-assisted patch automation for verified defenders. The rollout matters because it pairs stronger authorized-security capability with tighter access controls around dual-use offensive potential. Patch the Planet extends the effort into open-source software by funding maintainers and researchers to ship fixes faster. OpenAI also opened a partner program for security vendors and said it will work with governments and critical infrastructure operators.

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OpenAI and Trail of Bits launch Patch the Planet open-source security program

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Open Happening

OpenAI upgrades GPT-5.5-Cyber and Codex Security plugin for vulnerability discovery and patching

Security Tool/Service
H score14 First: 23.06.2026 06:56 Last: 23.06.2026 06:56 Sources 1

About this happening: OpenAI expanded Daybreak by releasing an improved GPT-5.5-Cyber model and updating the Codex Security plugin, giving trusted defenders faster tooling for finding...

Open Happening

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Open Happening

OpenAI launches Daybreak cybersecurity initiative for AI-powered vulnerability detection and patch validation

Security Tool/Service
H score25 First: 12.05.2026 09:55 Last: 12.05.2026 09:55 Sources 1

About this happening: OpenAI's Daybreak launch adds an AI-powered cybersecurity service for vulnerability detection and patch validation, helping organizations fix flaws before attacker...

Open Happening

Timeline

  1. 23.06.2026 17:15 2 articles · 22d ago

    Daybreak expands with GPT-5.5-Cyber and Codex Security patch automation

    Initial Disclosure

    OpenAI expands Daybreak with GPT-5.5-Cyber moving from preview to full release for verified defenders, alongside Codex Security updates that scan code, validate flaws, and generate fixes for human review. Access remains restricted with extra monitoring and controls because the model is more permissive for authorized security work.

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  2. 23.06.2026 17:15 1 articles · 22d ago

    Patch the Planet adds open-source maintainers and security vendor partners

    Campaign Scope Update

    OpenAI launches Patch the Planet with Trail of Bits and others to aim patching tools at open-source software, funding researchers to help maintainers fix bugs. The effort expands through more than 30 signed-up projects, including cURL, Go, and Python, and a partner program that lets vendors such as CrowdStrike, Sophos, and Fortinet build the models into their own products.

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  3. 23.06.2026 17:15 1 articles · 22d ago

    OpenAI reports CyberGym gains and large-scale fix metrics

    Technical Analysis Update

    OpenAI reports that GPT-5.5-Cyber scored 85.6% on CyberGym, compared with 81.8% for standard GPT-5.5, and that it saw gains in exploit writing and proof-of-concept generation tests. The company also says that since a March preview it has scanned more than 30 million commits across 30,000 codebases, with over 500,000 findings logged as fixed.

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