Discussion

• @sama Sam Altman on x

  OpenAI is launching Daybreak, our effort to accelerate cyber defense and continuously secure software. AI is already good and about to get super good at cybersecurity; we'd like to start working with as many companies as possible now to help them continuously secure themselves.

• @openai @openai on x

  Introducing Daybreak: frontier AI for cyber defenders. Daybreak brings together the most capable OpenAI models, Codex, and our security partners to accelerate cyber defense and continuously secure software. A step toward a future where security teams can move at the speed [video]

• @kimmonismus @kimmonismus on x

  Anthropic: “Claude Mythos is too cyber-capable to release broadly. We need tight controls. 😳” OpenAI: “Here's GPT-5.5-Cyber, Codex Security, Trusted Access tiers, repo scanning, patch generation, and red-team workflows. Please be verified first, but yes, go find the bugs. 😎”

• @cryps1s @cryps1s on x

  We're building incredible models to accelerate cyber defense - today.

• @simonw Simon Willison on x

  @cryps1s Was Daybreak already in the pipeline on 7th April when Anthropic announced Mythos or did you build this whole project in response to that in just over a month? (I'd be impressed either way to be honest)

• @zackkorman Zack Korman on x

  Daybreak is Temu Mythos

• @gdb Greg Brockman on x

  Daybreak: our umbrella effort for defensive acceleration, equipping cyber defenders with the best possible frontier AI capabilities.

• r/singularity r on reddit

  OpenAI Daybreak (response to Mythos)

• @openai @openai on x

  Find and fix vulnerabilities earlier with Daybreak [video]

• @roxas_root @roxas_root on x

  Love them finally moving on from confusingly boring names like idk gpt-5.4-cyber_max 🚀

• @openai @openai on x

  Cut through the security backlog with Daybreak [video]

• @0xsero @0xsero on x

  Now labs will gobble up cyber security, next it'll be robotics.

• @hesamation @hesamation on x

  “Let me throw in my codebase and scan for vulnerabilities how bad can it be?” [video]

• @hackinglz Justin Elze on x

  I'm confused did they just rebrand codex security? https://x.com/...

• @jxnlco Jason on x

  New era of cool names for OpenAI

• Aaron R. Aaron R. on linkedin

  Frontier AI labs are now shipping cybersecurity as a product —  OpenAI launched Daybreak today, following Anthropic's Mythos and Project Glasswing. …

• Julien Simiand Julien Simiand on linkedin

  Cybersecurity is entering a pretty interesting phase.  —  AI is starting to make it possible to reason across entire codebases, validate fixes …

• @metacurity.com Cynthia Brumfield on bluesky

  I love how Anthropic's Mythos just freaked everybody the eff out, but along comes OpenAI's model that is supposedly just as powerful, if not more powerful, and it's like a ho-hum news announcement.  —  openai.com/daybreak/