{"id":921,"date":"2026-04-21T09:30:00","date_gmt":"2026-04-21T01:30:00","guid":{"rendered":"https:\/\/blog.liu-qi.cn\/index.php\/2026\/04\/20\/x-daily-2026-04-20\/"},"modified":"2026-04-25T09:57:45","modified_gmt":"2026-04-25T01:57:45","slug":"x-daily-2026-04-20","status":"publish","type":"post","link":"https:\/\/en.blog.liu-qi.cn\/2026\/04\/21\/x-daily-2026-04-20\/","title":{"rendered":"X Platform April 20 AI Brief | LLM 'Subliminal Learning' Risk Emerges; Claude & Grok Updates Focus on Productivity"},"content":{"rendered":"<h2 id=\"topic-17d5f1b962\">Research on LLM &#8216;Subliminal Learning&#8217; &amp; Distillation Risks<\/h2>\n<p>Multiple bloggers referenced a paper published in Nature on AI &#8220;Subliminal Learning.&#8221; The study revealed that even when specific features (such as &#8220;owl&#8221; or negative traits) are removed from training data, a student model can still inherit these features from a related teacher model through pure numerical sequences. This indicates that features can hide within numerical textures, not just the semantic layer, posing a challenge to traditional semantics-based AI safety filtering methods.<\/p>\n<p>Sources:<\/p>\n<ul>\n<li>@vista8: <a href=\"https:\/\/x.com\/vista8\/status\/2046038788582088830\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/vista8\/status\/2046038788582088830<\/a> | <a href=\"https:\/\/x.com\/vista8\/status\/2046040021258678514\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/vista8\/status\/2046040021258678514<\/a><\/li>\n<li>@xiaohu: <a href=\"https:\/\/x.com\/xiaohu\/status\/2046028521060061580\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/xiaohu\/status\/2046028521060061580<\/a><\/li>\n<li>@lijigang: <a href=\"https:\/\/x.com\/lijigang\/status\/2046067932413968741\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/lijigang\/status\/2046067932413968741<\/a><\/li>\n<\/ul>\n<h2 id=\"topic-190a1e901b\">Claude Model Series Update &amp; Prompt Evolution<\/h2>\n<p>Multiple bloggers focused on the release of Claude 4.7 and changes to its system prompts. The new prompts emphasize &#8220;ask less, do more,&#8221; requiring the model to attempt first rather than ask when faced with ambiguity, and have elevated tool-calling priority (covering Excel, PPT, browser, etc.). Some bloggers also reported that version 4.7 may have regressed in Chinese language feel and contains a bug where punctuation only uses half-width input.<\/p>\n<p>Sources:<\/p>\n<ul>\n<li>@LufzzLiz: <a href=\"https:\/\/x.com\/LufzzLiz\/status\/2046002575938560283\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/LufzzLiz\/status\/2046002575938560283<\/a><\/li>\n<li>@xiaohu: <a href=\"https:\/\/x.com\/xiaohu\/status\/2046169871860515154\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/xiaohu\/status\/2046169871860515154<\/a><\/li>\n<\/ul>\n<h2 id=\"topic-51ec4f07c5\">Grok 4.3 Productivity Feature Upgrades &amp; Image Templates<\/h2>\n<p>Multiple bloggers discussed new features in Grok 4.3, including native support for generating Microsoft Word, Excel, and PowerPoint files, as well as built-in LaTeX compilation. Additionally, Grok Imagine received an update, allowing users to create custom templates by uploading images to apply specific styles (e.g., perfume style, voxel 3D, etc.).<\/p>\n<p>Sources:<\/p>\n<ul>\n<li>@elonmusk: <a href=\"https:\/\/x.com\/elonmusk\/status\/2046016151352930396\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/elonmusk\/status\/2046016151352930396<\/a> | <a href=\"https:\/\/x.com\/elonmusk\/status\/2046234586808520709\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/elonmusk\/status\/2046234586808520709<\/a><\/li>\n<li>@MANISH1027512: <a href=\"https:\/\/x.com\/MANISH1027512\/status\/2046236659465822711\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/MANISH1027512\/status\/2046236659465822711<\/a><\/li>\n<li>@elonmusk: <a href=\"https:\/\/x.com\/elonmusk\/status\/2046030060436734405\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/elonmusk\/status\/2046030060436734405<\/a><\/li>\n<\/ul>\n<h2 id=\"topic-3e244e915a\">AI-Native Workspaces &amp; Automation Tool Practices<\/h2>\n<p>Multiple bloggers shared practices with AI efficiency tools. Some recommended using Kollab to build team AI-native workspaces to solve AI output reuse and collaboration issues; others open-sourced a solution for monitoring and approving Claude Code permissions using e-ink screen hardware. Additionally, the public beta of Cloudflare Email Service attracted attention, supporting the configuration of free email for AI to handle tasks like customer service and invoicing.<\/p>\n<p>Sources:<\/p>\n<ul>\n<li>@cellinlab: <a href=\"https:\/\/x.com\/cellinlab\/status\/2046155899002302798\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/cellinlab\/status\/2046155899002302798<\/a> | <a href=\"https:\/\/x.com\/cellinlab\/status\/2046155990782116075\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/cellinlab\/status\/2046155990782116075<\/a><\/li>\n<li>@op7418: <a href=\"https:\/\/x.com\/op7418\/status\/2046045574118691143\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/op7418\/status\/2046045574118691143<\/a> | <a href=\"https:\/\/x.com\/op7418\/status\/2046046165951816172\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/op7418\/status\/2046046165951816172<\/a><\/li>\n<li>@xiaohu: <a href=\"https:\/\/x.com\/xiaohu\/status\/2046058401005031502\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/xiaohu\/status\/2046058401005031502<\/a> | <a href=\"https:\/\/x.com\/xiaohu\/status\/2046058403555143887\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/xiaohu\/status\/2046058403555143887<\/a><\/li>\n<\/ul>\n<h2 id=\"topic-081cb03f8e\">Model Capability Evaluation &amp; Prompt Optimization Tips<\/h2>\n<p>Multiple bloggers mentioned the latest model discoveries: a paper proves that using high-frequency words for prompts is much more effective than rare words; the new GPT Pro model&#8217;s A\/B testing shows its front-end design and interaction capabilities are outstanding, even evaluated as superior to Claude Design. Also, Tongyi Qianwen&#8217;s Qwen 3.6-max-preview was released yesterday.<\/p>\n<p>Sources:<\/p>\n<ul>\n<li>@vista8: <a href=\"https:\/\/x.com\/vista8\/status\/2046254553151262822\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/vista8\/status\/2046254553151262822<\/a><\/li>\n<li>@op7418: <a href=\"https:\/\/x.com\/op7418\/status\/2046172697118601349\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/op7418\/status\/2046172697118601349<\/a><\/li>\n<li>@LufzzLiz: <a href=\"https:\/\/x.com\/LufzzLiz\/status\/2046136342741196959\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/LufzzLiz\/status\/2046136342741196959<\/a><\/li>\n<\/ul>\n<h2 id=\"topic-2091b92465\">Other Tech Updates &amp; Social Highlights<\/h2>\n<p>Multiple bloggers shared related updates. Some discussed teaching children to use Codex and GitHub, and nurturing &#8216;AI-era natives&#8217;; forwarded discussions mentioned SpaceX completing its 600th rocket landing and Tesla launching its first large-scale lithium refinery, among other hard-tech advancements.<\/p>\n<p>Sources:<\/p>\n<ul>\n<li>@vista8: <a href=\"https:\/\/x.com\/vista8\/status\/2046176594688110768\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/vista8\/status\/2046176594688110768<\/a><\/li>\n<li>@elonmusk: <a href=\"https:\/\/x.com\/elonmusk\/status\/2045995291623702883\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/elonmusk\/status\/2045995291623702883<\/a> | <a href=\"https:\/\/x.com\/elonmusk\/status\/2046002375174111265\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/x.com\/elonmusk\/status\/2046002375174111265<\/a><\/li>\n<\/ul>\n<hr \/>\n<p>Scanned timeline count: 240, Hit bloggers count: 25, Total hit tweets: 118, Weighted tweet score: 92.05, Original tweet count: 63, RT tweet count: 29, Scrape attempts: 1, Boundary coverage status: Coverage complete<\/p>\n","protected":false},"excerpt":{"rendered":"<p>AI research reveals LLMs carry a &#8216;subliminal learning&#8217; risk that is hard to filter, while mainstream model updates enhance productivity features like file processing and automation tools.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[19],"class_list":["post-921","post","type-post","status-publish","format-standard","hentry","category-brief","tag-x--ai-"],"_links":{"self":[{"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/posts\/921","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/comments?post=921"}],"version-history":[{"count":2,"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/posts\/921\/revisions"}],"predecessor-version":[{"id":1089,"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/posts\/921\/revisions\/1089"}],"wp:attachment":[{"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/media?parent=921"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/categories?post=921"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/en.blog.liu-qi.cn\/index.php\/wp-json\/wp\/v2\/tags?post=921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}