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OpenAI Expands Daybreak Cyber Program With GPT-5.5-Cyber, Open Source Patching Effort

aiai-productsai-agents-codingai-modelingai-model-releasestechcybersecurity 19 posts · 10 accounts

OpenAI added a Codex Security plugin, the full version of its GPT-5.5-Cyber model for trusted defenders, a Cyber Partner Program and an open-source remediation initiative called Patch the Planet to its Daybreak cyber-defense program.

Codex Security can run deep scans, validate findings, trace attack paths, build threat models, generate codebase-specific patches for review and export results into existing tools. Participating companies in the Cyber Partner Program can use GPT-5.5 with Trusted Access for Cyber in customer products, while direct model access remains with those partners. Under Patch the Planet, OpenAI is working with maintainers and partners including cybersecurity firm Trail of Bits; Trail of Bits reported that one week of work found hundreds of bugs in projects including cURL, Python and Go, with 37 patches merged and more in flight.

From the sources (19 posts)

@openai

We’re expanding OpenAI Daybreak to help democratize patching vulnerable software at machine speed: - Codex Security plugin: find, validate, and fix vulnerabilities right inside Codex - The full version of GPT-5.5-Cyber model: a great mode

@openai

Codex Security empowers defenders with out-of-the-box security workflows. Teams can run deep scans, validate findings, trace attack paths, build threat models, generate codebase-specific patches for review, and export into the tools they a

@openai

GPT-5.5-Cyber is our most capable cyber model yet, designed for advanced, authorized defensive work: tracing vulnerable code, validating issues, developing patches, and preparing evidence for human review.

@openai

Patch the Planet is our effort to help open source maintainers move from security findings to merged fixes. We’re working with Trail of Bits, HackerOne, Calif, researchers, and maintainers to bring Codex Security and advanced models into t

@openai

We’re also launching the OpenAI Daybreak Cyber Partner Program with leading security software and services providers. Participating partners can use GPT‑5.5 with Trusted Access for Cyber in the security products and services they provide t

@cryps1s

RT @OpenAI: We’re expanding OpenAI Daybreak to help democratize patching vulnerable software at machine speed: - Codex Security plugin: fi…

@trailofbits

Patch the Planet is our joint initiative with @OpenAI to help maintainers strengthen critical open-source software. In one week, we used Codex and GPT-5.5-Cyber to find hundreds of bugs inside OSS like cURL, Python, and the Go project. 37

@trailofbits

30+ projects have already joined. Our goal is to prepare maintainers for machine-speed bug discovery. We put a team on each project, aim models at the code, patch the findings, and build custom security infrastructure for triage at scale.

@mtslive

SITUATION UPDATE: OpenAI has launched the full version of GPT-5.5-Cyber, its most capable cybersecurity model, in a continued limited release to trusted defenders. The company also expanded its Daybreak program with a Codex Security plugin

@techmeme

OpenAI unveils an updated GPT-5.5-Cyber model, launches the Patch the Planet initiative in partnership with Trail of Bits to fix open source bugs, and more (@lilyhnewman / Wired) (Visit Techmeme dot com for the link and full context!)

@daveaitel

RT @trailofbits: Patch the Planet is our joint initiative with @OpenAI to help maintainers strengthen critical open-source software. In on…

@daveaitel

RT @OpenAI: We’re expanding OpenAI Daybreak to help democratize patching vulnerable software at machine speed: - Codex Security plugin: fi…

@daveaitel

RT @OpenAI: Codex Security empowers defenders with out-of-the-box security workflows. Teams can run deep scans, validate findings, trace a…

@daveaitel

RT @OpenAI: GPT-5.5-Cyber is our most capable cyber model yet, designed for advanced, authorized defensive work: tracing vulnerable code, v…

@reach_vb

We’re expanding OpenAI Daybreak to help defenders move faster from vulnerabilities to fixes. > Codex Security is now easier to use across the CLI, plugins, and the Codex app - scanning code, building threat models, validating findings, gen

@daveaitel

RT @dguido: @clintgibler @steipete I open-sourced the internal @trailofbits guidance on using Codex to help project maintainers secure thei…

@gdb

We're accelerating patching, in addition to vuln finding, with new tools and models in OpenAI Daybreak. Our models are now discovering and generating patches for critical vulns in major browsers, network infrastructure, and operating syste

@bdsqlsz

RT @OpenAI: We’re expanding OpenAI Daybreak to help democratize patching vulnerable software at machine speed: - Codex Security plugin: fi…

@intcyberdigest

‼️🚨 BREAKING: OpenAI just launched a new cyber model that beats Mythos on CyberGym, a benchmark for finding real software bugs. The real story: OpenAI just upgraded the permissive, exploit-capable cyber model it already gives "verified def

Preview built on a synthetic news corpus (16 weeks, Apr–Jul 2026). Impact calls are model reads, not price data.

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