{"id":212755,"date":"2026-05-12T13:30:00","date_gmt":"2026-05-12T17:30:00","guid":{"rendered":"https:\/\/testing.news-you-need.com\/index.php\/2026\/05\/12\/openai-launches-cybersecurity-initiative-to-compete-with-anthropics-mythos\/"},"modified":"2026-05-12T13:35:09","modified_gmt":"2026-05-12T17:35:09","slug":"openai-launches-cybersecurity-initiative-to-compete-with-anthropics-mythos","status":"publish","type":"post","link":"https:\/\/testing.news-you-need.com\/index.php\/2026\/05\/12\/openai-launches-cybersecurity-initiative-to-compete-with-anthropics-mythos\/","title":{"rendered":"OpenAI Launches Cybersecurity Initiative To Compete With Anthropic\u2019s Mythos"},"content":{"rendered":"

OpenAI Launches Cybersecurity Initiative To Compete With Anthropic\u2019s Mythos<\/a><\/p>\n

https:\/\/stocktwits.com\/news-articles\/markets\/equity\/open-ai-launches-cybersecurity-initiative-to-compete-with-anthropic-s-mythos\/cZXXjM4Reiq<\/a><\/p>\n

Publish Date: 2026-05-12 13:30:00<\/a><\/p>\n

Source Domain: stocktwits.com<\/a><\/p>\n

Author: <\/a><\/p>\n

Using an unordered list, summarize the following article with between 4 and 8 key points. OpenAI\u2019s GPT-5.5-Cyber model, like Anthropic\u2019s Mythos, can detect vulnerabilities in most software.OpenAI launched its security AI software named Daybreak.Daybreak uses the Codex Security AI agent that launched in March to create a threat model.\u00a0Launch comes just over a month after rival Anthropic announced Claude Mythos.OpenAI announced the launch of “Daybreak” on Tuesday, a new cybersecurity initiative designed to automate the detection and patching of software vulnerabilities, in a move to compete with rival Anthropic\u2019s recently launched security AI, named Mythos.\u00a0Daybreak represents a strategic shift for OpenAI, moving from general-purpose AI to specialized defensive agents. The initiative integrates OpenAI\u2019s frontier models with an “agentic harness” called Codex Security. Unlike traditional scanners that merely flag bugs, Daybreak is built to map a company’s entire code repository, build a threat model of realistic attack paths, and autonomously generate and test patches.”Daybreak is based on the idea that the next era of cyberdefense should be resilient by design,” OpenAI said in its announcement. “Defenders can now bring secure code review, threat modeling, and patch validation into the everyday development loop so software becomes more resilient from the start.”OpenAI has structured Daybreak across three different tiers. The GOT 5.5 layer is meant for general\u00a0developers and knowledge work. GPT 5.5 with trusted access for Cyber\u00a0is a restricted tier for malware\u00a0and vulnerability analysis,\u00a0while the\u00a0third, GPT 5.5 Cyber, is the advanced version gated behind strict identity verification policies.\u00a0Mythos Vs Daybreak\u00a0The launch is widely seen as a direct response to Anthropic\u2019s Claude Mythos, a model structured to find zero-day vulnerabilities, but Anthropic has refused to release it to the public.\u00a0Anthropic recently granted access to a select group of roughly 40 partners, including Mozilla, which used the tool to patch 271 bugs in its Firefox browser.\u00a0OpenAI\u2019s Daybreak appears more accessible. OpenAI CEO Sam Altman stated on X that the company intends to work with “as many companies as possible,” already listing partners such as Cloudflare, Cisco, CrowdStrike, and Palo Alto Networks.\u00a0\u201cWe\u2019re excited about the potential of OpenAI\u2019s cyber capabilities to bring stronger reasoning and more agentic execution into security workflows. It\u2019s a big step forward for teams to be able to leverage frontier models not only to accelerate velocity, but also to improve their security posture,\u201d said Dane Knecht, CTO, Cloudflare.OpenAI And Anthropic Retail View\u00a0Retail sentiment on Stocktwits was \u201cextremely bullish\u201d for OpenAI and Anthropic,\u00a0accompanied by \u201cnormal\u201d message volumes.For updates and corrections, email newsroom[at]stocktwits[dot]com.Subscribe to Chart ArtGet the daily email that keeps you tuned in and makes markets fun again.Read about our editorial guidelines and ethics policy
<\/p>\n","protected":false},"excerpt":{"rendered":"

OpenAI Launches Cybersecurity Initiative To Compete With Anthropic\u2019s Mythos https:\/\/stocktwits.com\/news-articles\/markets\/equity\/open-ai-launches-cybersecurity-initiative-to-compete-with-anthropic-s-mythos\/cZXXjM4Reiq Publish Date: 2026-05-12 13:30:00 Source…<\/p>\n","protected":false},"author":1,"featured_media":212756,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/news.stocktwits-cdn.com\/large_Getty_Images_2267815475_jpg_0a1b68c7e3.webp","fifu_image_alt":"","footnotes":""},"categories":[15],"tags":[26,24,32,27],"class_list":["post-212755","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity","tag-ai","tag-cybersecurity","tag-malware","tag-vulnerability"],"_links":{"self":[{"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/212755"}],"collection":[{"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/comments?post=212755"}],"version-history":[{"count":1,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/212755\/revisions"}],"predecessor-version":[{"id":212757,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/212755\/revisions\/212757"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/media\/212756"}],"wp:attachment":[{"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/media?parent=212755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/categories?post=212755"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/testing.news-you-need.com\/index.php\/wp-json\/wp\/v2\/tags?post=212755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}