4/ It's still early – does occasionally flag stuff I already knew, and proactive first drafts could be stronger. Excited to get better at this, feels clear this is how we'll end up working (not going to a tool ourselves, but instead work showing up ready to approve / edit).
APPS
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Claude Duet Preview Uses Opus 5.5 for Proactive Assistance
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BREAKING 🔥: Anthropic announced Claude Duet, a new proactive agent that comes as a standalone research preview app.
— 🚨 AI News | TestingCatalog (@testingcatalog) 21 octobre 2026
> It is available through a waitlist on Pro and Max plans in the US.
> Claude Duet is designed around Claude Opus 5.5 so the agent can judge and decide what…BREAKING 🔥: Anthropic announced Claude Duet, a new proactive agent that comes as a standalone research preview app. > It is available through a waitlist on Pro and Max plans in the US. > Claude Duet is designed around Claude Opus 5.5 so the agent can judge and decide what
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Claude Duet Proactively Completes Tasks With User Approval Before Actions
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We’re opening a research preview of Claude Duet, a new app where Claude works as a proactive agent.
— Claude (@claudeai) 21 octobre 2026
It comes to you with what needs your attention, completes tasks you ask of it, keeps working when you step away, and checks with you before it acts on your behalf. pic.twitter.com/kt8gAbWuX8We’re opening a research preview of Claude Duet, a new app where Claude works as a proactive agent. It comes to you with what needs your attention, completes tasks you ask of it, keeps working when you step away, and checks with you before it acts on your behalf.
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Phone Use API Gives AI Agents Cloud Android and iPhone Devices
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defining a new category: phone-use
— Abdulla Ababakre (@abdullababakre) 21 octobre 2026
an mcp/api that gives ai agents their own phones
cloud phones. real androids. real iphones.
tell your agent what to do, and it can operate a phone just like you do.
today, ai agents face three fundamental problems and phoneuse solves them 🧵 pic.twitter.com/d26pqBkQyNdefining a new category: phone-use an mcp/api that gives ai agents their own phones cloud phones. real androids. real iphones. tell your agent what to do, and it can operate a phone just like you do. today, ai agents face three fundamental problems and phoneuse solves them 🧵
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Dot Browser Context Gaps Highlight Differences From Muse User Experience
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Another example of the experience polish in Muse versus Dot: Dot has no idea about the popout browser Codex uses despite being next to it. Technically makes sense (Dot has its own computer), but it's confusing and shouldn't matter.
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Feedbackbench Ranks Personal AI Agents Using Real User Experience
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AI demos show you what a product can do. Real users tell you what it's actually like.
— AI Highlight (@AIHighlight) 21 octobre 2026
That's what makes @feedbackbench interesting.
Its Personal Agents rankings launch today, placing Muse first and ChatGPT Dots eighth among nine agents.
It's built by @enterpret_ai, which… https://t.co/Wb5BkHQn0rAI demos show you what a product can do. Real users tell you what it's actually like. That's what makes @feedbackbench interesting. Its Personal Agents rankings launch today, placing Muse first and ChatGPT Dots eighth among nine agents. It's built by @enterpret_ai
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ChatGPT Sites Demo Adds a Database and MCP Access for Agents
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Turns out building with @ChatGPT Sites is pretty addicting. So is clicking cookies. 🍪
— Craig Dennis (@craigsdennis) 21 octobre 2026
I made a little demo that does both, with a database and an MCP server so ChatGPT and Codex can join in.
Come hang out. I hope it gives you an idea for something fun to build.
Chapters:… pic.twitter.com/brISttIBVgTurns out building with @ChatGPT Sites is pretty addicting. So is clicking cookies. 🍪 I made a little demo that does both, with a database and an MCP server so ChatGPT and Codex can join in. Come hang out. I hope it gives you an idea for something fun to build. Chapters:
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User Sends Grok Bot Curated Lists to Reduce Manual News Reading
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All my lists (most complete of tech industry here on X): https://
x.com/scobleizer/lis
ts
… Send your GrokBot to them to learn for you so you don't need to doomscroll nearly as much. -
Grok Bot Uses X History and Lists for Personalized News
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I've been GrokBot pilled. First of all, Grok knows me better than other bots, like Meta Muse, thanks to the 300,000 posts I've done here for 20 years. But now that GrokBot @bot can read lists, it opens up powerful new personalized news capabilities. I've done this for about
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Grok Bot List Reading Supports Personalized News
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Grok Bot can now read lists.
— Robert Scoble (@Scobleizer) 21 octobre 2026
It is quite good. Makes personalized news much easier to do. https://t.co/He3w67AV6JGrok Bot can now read lists. It is quite good. Makes personalized news much easier to do.