{"id":61190,"date":"2026-07-31T15:04:04","date_gmt":"2026-07-31T15:04:04","guid":{"rendered":"https:\/\/www.theregister.com\/a\/5281797"},"modified":"2026-07-31T15:04:04","modified_gmt":"2026-07-31T15:04:04","slug":"anthropic-and-openai-are-competing-to-see-whose-agents-can-go-rogue-harder","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/anthropic-and-openai-are-competing-to-see-whose-agents-can-go-rogue-harder\/","title":{"rendered":"Anthropic and OpenAI are competing to see whose agents can go rogue harder"},"content":{"rendered":"<div><img decoding=\"async\" src=\"https:\/\/image.theregister.com\/5248788.jpg?imageId=5248788&amp;x=0&amp;y=2.5&amp;cropw=100&amp;croph=71.67&amp;panox=0&amp;panoy=2.5&amp;panow=100&amp;panoh=71.67&amp;width=1200&amp;height=683\" class=\"ff-og-image-inserted\"><\/div>\n<p>One company&#8217;s inventive campaign for an unreleased product has become a contest between Anthropic and OpenAI to see which can shout the loudest about its own failures.<\/p>\n<p>Readers who <a href=\"https:\/\/www.theregister.com\/ai-and-ml\/2026\/07\/31\/anthropics-claude-escaped-test-sandbox-to-attack-three-organizations\/5281562\">tuned in earlier today<\/a> saw the latest episode in the drama \u2013 or sitcom \u2013 as Anthropic tried to outdo OpenAI&#8217;s appropriation of the Mythos marketing playbook and made itself the punchline.<\/p>\n<p>Since first teasing Mythos in April, Anthropic has marketed the model through fear \u2013 declaring its cybersecurity models too dangerous for public release and offering access only to a select few trusted organizations via <a href=\"https:\/\/www.theregister.com\/security\/2026\/06\/03\/anthropic-ups-glasswing-partner-count-4x-uk-banks-snubbed\/5250450\">Project Glasswing<\/a>.<\/p>\n<p>To its credit, the strategy has paid off. Anthropic has closely associated the Mythos name with cybersecurity, which may explain why OpenAI appeared to borrow its competitor&#8217;s proven PR strategy last week.<\/p>\n<p>OpenAI agents exploited a zero-day to escape their sandbox, leading to the <a href=\"https:\/\/www.theregister.com\/ai-and-ml\/2026\/07\/22\/openai-admits-it-was-the-source-of-the-agent-swarm-that-attacked-hugging-face\/5275939\">autonomous cyberattack on Hugging Face<\/a>. The episode duly secured sensational headlines playing on the long-held fear that AI will one day go rogue and take over the world.<\/p>\n<p>Anthropic responded this week by lathering on even more clown makeup, squandering an opportunity in the process.<\/p>\n<p>The Claude maker sent its models into a testing environment to capture a flag. Their prompts said they had no internet access, but because of what Anthropic called &#8220;a misunderstanding&#8221; with evaluation partner Irregular, the connection was live.<\/p>\n<p>Anthropic&#8217;s models then followed OpenAI&#8217;s script: they reached the public internet and attacked systems belonging to outside organizations. This time, three were affected rather than one, the company <a href=\"https:\/\/www.theregister.com\/ai-and-ml\/2026\/07\/31\/anthropics-claude-escaped-test-sandbox-to-attack-three-organizations\/5281562\">admitted<\/a>.<\/p>\n<p>In one scenario, Mythos 5 persuaded developers to download a poisoned PyPI package. It was installed on 15 machines, including one at a cybersecurity company that routinely scans such packages for malware.<\/p>\n<p>In Anthropic&#8217;s words: &#8220;When that company&#8217;s scanner installed the package, Claude&#8217;s hidden code executed. We believe the company&#8217;s security scanner treated <a href=\"https:\/\/www.theregister.com\/security\/2026\/03\/30\/telnyx-package-latest-hit-in-pypi-supply-chain-compromise\/5221465\">PyPI packages<\/a> as safe to install, and as a result, Claude was able to exfiltrate the company\u2019s credentials to a collection point it had set up. Claude then used these credentials to access further infrastructure from this company.&#8221;<\/p>\n<p>Worse still, the first of the three incidents occurred in April. Anthropic discovered them only months later, during a retrospective manual review prompted by OpenAI&#8217;s disclosure.&nbsp;Had it not gone looking, they might never have been discovered, let alone disclosed.<\/p>\n<p>There are some caveats. Opus 4.7, the oldest model tested, attacked production systems despite apparently recognizing what it was doing. Mythos 5 recognized that accessing the internet violated its instructions, then reasoned its way into continuing anyway. It was also responsible for publishing the poisoned PyPI package.<\/p>\n<p>Only an unnamed research model stopped itself from attacking external organizations.<\/p>\n<p>Anthropic also said the models were not running with the production safeguards and monitoring that would normally surround a deployment.&nbsp;Most damningly, Anthropic ran Mythos 5 \u2013 the model it had deemed too dangerous for public release \u2013 without safeguards in an environment that unexpectedly had internet access.<\/p>\n<p>Following OpenAI&#8217;s admission that it failed so badly in its responsibility to control its technology, Anthropic could have easily spun the story in its favor.<\/p>\n<p>You don&#8217;t have to be fictional tapdancing political PR antihero <a href=\"https:\/\/www.imdb.com\/title\/tt0459159\/\">Malcolm Tucker<\/a> to see how Anthropic could have used the episode to make its case as the safer, more trustworthy AI company.<\/p>\n<p>Instead, realizing its own <a href=\"https:\/\/www.theregister.com\/security\/2026\/05\/11\/anthropics-bug-hunting-mythos-was-greatest-marketing-stunt-ever-says-curl-creator\/5238111\">marketing playbook<\/a> was being used to help a competitor, it went head-to-head with OpenAI, willingly admitted that it made similar sandbox-based blunders, and disclosed that the results were even more calamitous. Three companies hacked, not just one.<\/p>\n<p>So, while the AI biz has attempted to eclipse OpenAI&#8217;s &#8220;rogue agent&#8221; story with its own, what&#8217;s left behind is a new reputation for irresponsible handling of technology.<\/p>\n<h3>Failed superheroes<\/h3>\n<p>The incident does not instill a great deal of trust in either Anthropic or OpenAi to safeguard the world from its AI.<\/p>\n<p>Dr Ilia Kolochenko, founder of ImmuniWeb and practising cybersecurity and data protection lawyer, likened the two companies to failed superheroes.<\/p>\n<p>&#8220;While making conclusions would be a bit premature at this point in time, the incidents certainly do not increase confidence in the AI vendor&#8217;s ability to safely deploy AI, let alone to assure their customers that the so-called frontier models are safe to use,&#8221; he told <span class=\"italic m-italic \" data-lab-italic=\"italic\">The Register<\/span>.&nbsp;<\/p>\n<p>&#8220;It is akin to hiring a superhero to protect you but being afraid that the superhero may suddenly go rogue and kill you and your family. Nobody needs such a superhero.&#8221;<\/p>\n<p>Likewise, security pro Jake Williams, VP at HunterStrategy and IANS faculty member, <a href=\"https:\/\/x.com\/MalwareJake\/status\/2082997858349858984\">said<\/a>: &#8220;I&#8217;m not going to mince words: the major AI labs are negligent in protecting the public from their agents.&nbsp;<\/p>\n<div data-element-guid=\"afe083ca-6701-48e9-9bd8-f8827dd7fb42\" class=\"lab4 column articleList layout_vertical imageLayout_left small-12 large-12 small-abs-12 large-abs-12 abs_grid_12 grid-vas-start mobile-grid-vas-start\">\n<div class=\"content border_width_0 border_width_mobile_0 border-radius-48 border-radius-mobile_48\">\n<h2 class=\"article-list-title t19 font-RobotoCondensed\">MORE CONTEXT<\/h2>\n<\/p><\/div>\n<\/div>\n<p>&#8220;We need government regulation now or at the very least a private cause of action with guaranteed punitive damages for agents damaging others.&#8221;<\/p>\n<p>By trying to reclaim a marketing trope that served it well, Anthropic has invited scrutiny of its own safety record and accusations that it is <a href=\"https:\/\/x.com\/JakeMooreUK\/status\/2083063439937741004\">chasing attention above all else<\/a>.<\/p>\n<p>Other experts we spoke to shared the concern that both companies are mishandling their agents, with potentially greater consequences as the systems become more capable.<\/p>\n<p>The common thread is recklessness, which Anthropic and OpenAI seem oddly eager to advertise. \u00ae<\/p>\n<p> <img decoding=\"async\" src=\"https:\/\/image.theregister.com\/?imageId=5248788&#038;width=800\">READ MORE <a href=\"https:\/\/www.theregister.com\/security\/2026\/07\/31\/anthropic-and-openai-are-competing-to-see-whose-agents-can-go-rogue-harder\/5281797\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p> Whoever wins, we lose READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":61191,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[307],"class_list":["post-61190","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-the-register","tag-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Anthropic and OpenAI are competing to see whose agents can go rogue harder 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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