Beam: Reflection's 501B open-weight model

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Beam is a large language model that combines pretraining and reinforcement learning to achieve strong performance in coding, agentic, and reasoning tasks. It was trained on 23.8 trillion high-quality tokens from the web and proprietary licensed datasets using a novel scaling recipe for reinforcement learning.

Opus 5.5 agents discover two room-temperature magnetic semiconductor candidates

https://www.vals.ai/blogs/2026-10-04-room-temperature-magnetic-semiconductors/three_magnets.svg
Researchers used AI to design a new magnet with properties between ferromagnetic and antiferromagnetic materials, which could improve computer memory. The material has zero net spin moment but sorts electrons by energy level, allowing for faster switching and higher storage performance.

Find the flattest route between any two points in SF

https://flattensf.com/preview.jpg
The route is computed using 1m lidar elevation and street graph data, balancing distance and climbing. The slider offers various options, excluding stairways on bikes while allowing them on foot.

Dust: Pretraining Transformers Without Backpropagation

https://qlabs.sh/research/dust/figures/x-method.gif
Researchers have developed a zeroth-order optimization algorithm called Dust that is competitive with backpropagation at pretraining transformer language models. The algorithm perturbs activations independently at every token, allowing for parallel evaluation and efficient computation.

Example.com Just Launched the Biggest Redesign in Decades

https://www.debugbear.com/dimg/3fcf95b7dbb16b31bb844bc5db74cb5e.png
The example.com domain has undergone several changes over the years, with updates aimed at reducing bandwidth demands and improving its utility. The latest redesign introduces multi-language support using JavaScript, showing content in a new language every 5 seconds.

Using Blu-ray M-Disk as Backup of Last Resort

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The author created a decentralized backup system using Blu-ray drives and M-Discs, storing essential data such as photos and digital life essentials on password-protected discs. The discs are stored in custom-made cases with seals for added security, allowing the author to track tampering attempts.

Web Search API

https://developers.cloudflare.com/changelog/post/2026-10-02-introducing-web-search-api/og.png?v=1deaa8fb09156b56
Web Search API is now available in beta, allowing AI agents to search the internet and ground responses in live information. It supports three providers: Ceramic.ai, Exa, and Linkup, with no additional markup on top of provider prices.

Competitive Programmer's Handbook (2018) [pdf]

This book provides a thorough introduction to competitive programming, focusing on algorithms and mathematical thinking. It is suitable for students interested in IOI or ICPC, as well as anyone looking to learn about competitive programming.

Worth Building

https://armstr.ng/_astro/8ad414aee13f7e50a58d87907fb972a367dfb4d3a5bb659be63950a4b716074e_Z1kr33T.png
The author built a domain lookup tool, heade.rs, using Claude Code, focusing on usability and aesthetics over monetization. It reflects a shift in motivation from justifying effort to creating tools that simply exist for personal use.

DEDA – Tracking Dots Extraction, Decoding and Anonymisation Toolkit

https://opengraph.githubassets.com/f13b7e36a47b15a13eee1c8b0df7e60ead974c73283122daaa11c9c71b64c585/dfd-tud/deda
Colour tracking dots are used in printers to encode information about the device and printout, allowing for forensic analysis and anonymisation. The process can be performed using software such as deda_extract_yd or deda_create_dots.

Food Atlas: Connections behind the dishes we love

The effortless way to control AI

A third way of using Linux

Anthropic reported diary entry to police, woman faces felony charge

https://www.techspot.com/images2/news/bigimage/2026/10/2026-10-04-image-9.jpg
A Florida woman is facing felony charges after using a chatbot to write a threatening message, which was reported to police by the company's safety systems. The incident highlights the need for users to think carefully before sharing sensitive information with AI-powered tools.

Making a GTK application in Haskell, part 1

https://floreal.tech/blog/2026/making-a-gtk-app-in-haskell-part-1/empty-window.png
This series will build a todo-list application using Haskell, GTK 4, and Adwaita library to create responsive design. The application state and actions are modeled as data structures, with messages triggering updates to the model and view.

Graphical UI

https://www.graphicalui.com/_next/image?url=%2Fmarketing%2Fbuilds%2Fstations-jamie.png&w=3840&q=75&dpl=dpl_9ZwEXBfsxSRKcWgDRnFyWFRfDxVs
Users frequently mention difficulty in determining who has access to shared features, with @Scott seeking clarification. The Graphical platform offers customizable themes and tools for developers and designers to build consistent UI across projects.

Linux containers in 500 lines of code (2016)

The user has written code to create a Linux container with restricted capabilities, using namespaces and seccomp filters to limit system calls and prevent privilege escalation. The code includes various checks and restrictions, such as dropping specific capabilities like CAP_NET_ADMIN and CAP_SYS_ADMIN, as well as setting up cgroups and resource limits for the container.

Incident with Actions

https://user-images.githubusercontent.com/19292210/60553865-044dd200-9cea-11e9-859c-d6f266e2f01f.png
GitHub's Status Page - Incident with Actions.

Texas city demands $2M for public records on Flock usage

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Cities are charging high fees for Flock data, with some requesting $2.3 million or more to access records about police use of AI-enabled camera systems that track every vehicle passing by. Anti-surveillance groups argue this stifle public records searches and hide data on potential abuses of the system.

The Future of Mathematics

Jeremy Avigad discusses the impact of AI on mathematics, noting that while AI can solve problems, it may not lead to novel ideas and insights. He argues that human mathematicians should focus on pursuing mathematical understanding in the age of AI.

Show HN: Nightwatch – a Mac menu-bar app that tells you when tonight is clear

https://raw.githubusercontent.com/rsutcliffe/nightwatch/main/docs/images/nightwatch-icon.png
Nightwatch is a macOS app that provides astronomy information, including clear sky forecasts, target suggestions, and alerts for optimal viewing conditions. It offers features such as customizable settings, favourites lists, and integration with other apps like Apple Maps.

The lamps in my house

https://storage.ghost.io/c/ce/27/ce27a3ef-1519-4f17-a161-c8cdf7793306/content/images/size/w1920/2026/10/L1008301-1.jpeg
The author shares their passion for designer lamps, showcasing 15 unique pieces from various designers and eras. They discuss the value of these lamps, which can be expensive but hold sentimental worth for them.

Apple and a hacker's future

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The author's Mac Mini was hacked due to a macOS vulnerability, but they were able to detect and remove the malware using their custom agent software. The author is now questioning Apple's approach to security and control over user data.

Qualcomm licenses patents on Huawei’s LogicFolding chip tech

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The first fully implanted cochlear implant reaches patients

https://spectrum.ieee.org/media-library/schematic-illustration-of-a-fully-internal-cochlear-implant.jpg?id=67959917&width=980&quality=100
Med-El has launched the TICI Unico, a fully implanted cochlear implant that restores round-the-clock hearing without visible components. The device provides comparable performance to conventional implants and allows users to hear while asleep, swimming, and recharging.

Norway Eyes Partial Ban of Smart Glasses

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2026 Nobel Prize in Physiology or Medicine: Deisseroth, Hegemann, Nagel

https://www.nobelprize.org/uploads/2026/10/NP_POM_2026_3-2_01-1024x683.jpg
The Nobel Prize in Physiology or Medicine 2026 was awarded to Karl Deisseroth, Peter Hegemann and Georg Nagel for their discoveries concerning light-gated ion channels and optogenetics. The award is recognized on the official Nobel Prize website.

Type Safe Generic Data Structures in C (2025)

https://danielchasehooper.com/images/ogimage.png
The author presents a type-safe generic data structure in C using unions and macros, allowing for flexible data structures like linked lists. The technique uses a union with a parameterized payload to enforce type safety at compile time.

Differences Between `Foldl` and `Foldr`

https://blog.haskell.org/images/haskell-opengraph.png
The difference between foldl and foldr lies in their associativity, with foldl being left-associated and foldr right-associated, impacting their behavior in strict and lazy languages. In strict languages, using foldl' ensures constant space consumption while using foldr can save work if the reducing function is lazy; however, this advantage disappears in lazy languages where both approaches ...

The era of software quality, or the era of ostriches?

The author discusses the challenges of writing secure code and the benefits of using AI vulnerability scanning in GNOME development. They argue that relying solely on human reviewers is insufficient due to the increasing number of vulnerabilities found by AI scanners.

The technology to eradicate mosquito-borne disease exists

https://worksinprogress.co/.netlify/images?url=https%3A%2F%2Fassets.worksinprogress.co%2Fwp-content%2Fuploads%2F2026%2F09%2FIssue-26_Wolbachia-mating.jpg&w=2500&h=2335&q=65&fit=cover
The US is experiencing a resurgence of mosquito-borne diseases like dengue and malaria due to climate change, but new technologies offer solutions. Genetic engineering can suppress mosquitoes by releasing male mosquitoes that cannot survive or produce offspring with the gene.