{"id":151428,"date":"2026-04-10T12:54:02","date_gmt":"2026-04-10T10:54:02","guid":{"rendered":"https:\/\/thecuriousbrain.com\/?p=151428"},"modified":"2026-04-10T12:54:04","modified_gmt":"2026-04-10T10:54:04","slug":"anthropics-claude-mythos-just-broke-containment","status":"publish","type":"post","link":"https:\/\/thecuriousbrain.com\/?p=151428","title":{"rendered":"Anthropic&#8217;s Claude Mythos Just Broke Containment"},"content":{"rendered":"\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"922\" height=\"519\" src=\"https:\/\/www.youtube.com\/embed\/AAm_VuXDoVw?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en-US&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":151430,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[193],"tags":[3544,4331,4330],"class_list":["post-151428","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-videos","tag-ai","tag-anthropic-claude","tag-mythos"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/thecuriousbrain.com\/wp-content\/uploads\/anthropics-claude-mythos-just-br.jpg?fit=1280%2C720&ssl=1","jetpack-related-posts":[{"id":151000,"url":"https:\/\/thecuriousbrain.com\/?p=151000","url_meta":{"origin":151428,"position":0},"title":"Anthropic CEO on &#8220;red lines&#8221; 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