Nikita Bier, X’s head of product, has announced the launch of custom timelines, which lets you curate what you see on your feed based on your topics of interest. He called the update “one of the biggest changes to X” and a ”huge undertaking” that took the team “many months” to develop. The feature lets you pin specific topics to your home tab, so you can switch from one to the other to see the latest discussions about your interests and hobbies. Bier said that X’s custom timelines is “powered by Grok's understanding of every post with the algorithm's personalization.” You have 75 topics to choose from, including food, art, photography, business, finance, movies and TV. As you’d expect, the personalization aspect of the feature works better if it’s a topic you already engage with regularly. X’s new feature is similar to Bluesky’s and Threads’ custom feeds, which also allow you to pin topic-based timelines to the home screens of the apps, and which their users have been enjoying since 2023 and 2024, respectively. At the moment, X’s custom timelines is still in its early access phase and is only available to Premium subscribers on iOS. It will be rolling out to Premium users on Android “very soon,” as well. Bier has also announced that X has released a tool to snooze topics on the For You tab. With the tool, you’ll be able to hide certain topics, such as politics or sports, for 24 hours from your feed. It’s now available for Premium users on iOS and the web. Ladies and gentlemen, today we're launching one of our biggest changes to 𝕏 Introducing Custom Timelines This feature allows you to pin a specific topic to your home tab. With support for over 75 topics, you can dive deep into your favorite niche on X. It's powered by Grok's… pic.twitter.com/9jkIEXvubj — Nikita Bier (@nikitabier) April 21, 2026 This article originally appeared on Engadget at https://www.engadget.com/social-media/x-finally-adds-custom-timelines-103130966.html?src=rss
Anthropic is investigating potential "unauthorized access" to its Claude Mythos model that has been touted for its ability to find cybersecurity flaws, the company told Bloomberg . A group gained access to the model through a third-party contractor portal and by using internet sleuthing tools, according to the report. However, the group is only interested in trying the models and not using them maliciously, according to a person familiar with the matter. "We're investigating a report claiming unauthorized access to Claude Mythos Previous through one of our third-party vendor environments," Anthropic said in a statement. The Claude Mythos Preview arrived earlier this month as part of " Project Glasswing " with significant fanfare. Anthropic limited the preview release to a small number of trusted test companies including Amazon, Microsoft, Apple and Cisco. Another was Mozilla, which said the model helped it find and patch 271 Firefox vulnerabilities . A growing number of banks and government agencies have been seeking access as well in order to safeguard their own systems. However, several unauthorized users (who reportedly have a private chat on Discord), supposedly gained access to Mythos through a developer portal and by making an educated guess as to where the model might be located. That same group may also have access to other unreleased Anthropic models, according to the report. The new Mythos model has gained notoriety of late for its supposed ability to sniff out security flaws in operating systems and internet browsers. This has prompted some skepticism among security researchers but also fear that AI-generated cyber attacks could become a "real threat," CTO of cloud security firm Edera Alex Zenla recently told Wired . Anthropic was recently designated as a " supply chain risk " by the US Department of Defense, but has been in talks with the Trump administration of late to have that label removed. This article originally appeared on Engadget at https://www.engadget.com/ai/anthropic-is-investigating-unauthorized-access-of-its-mythos-cybersecurity-tool-091017168.html?src=rss
Anthropic's buzzy announcement about using AI to improve cybersecurity earlier this month was met with plenty of skepticism. However, Mozilla shared some details that support use of the company's special Claude Mythos Preview model as a way to protect critical services. Using Mythos helped Mozilla's team find and patch 271 vulnerabilities in the latest release of the Firefox browser. "So far we’ve found no category or complexity of vulnerability that humans can find that this model can’t," the foundation said. The blog post from Mozilla feels like a positive sign for Anthropic's Project Glasswing. Obviously the AI company would want to put itself in the best possible light while presenting its own initiative, but there's something encouraging about hearing the benefits from a third party. Mozilla also noted that in its time with Claude Mythos, the AI wasn't able to turn up any bugs that a human wouldn't have been able to find, given enough time and resources, which indicates that AI isn't presently able to do more to crack cybersecurity protections than a person can. An organizaion successfully using AI for good is certainly a refreshing change of pace in tech news. And for those Firefox users who aren't personally interested in applying any generative AI in their browsing, Mozilla has given the option to turn it all off for the past several months. This article originally appeared on Engadget at https://www.engadget.com/ai/mozilla-says-it-patched-271-firefox-vulnerabilities-thanks-to-anthropics-claude-mythos-224330023.html?src=rss
