Measuring AI Ability to Complete Long Tasks: Opus 4.5 has 50% horizon of 4h49M
Linear Scale Log Scale 50% Success 80% Success Analysis code available on GitHub Raw data available here This is our most up-to-date measurement of the task-completion time horizons for public language models. We intend to update this graph periodically whenever we have new measurements to share. For methodological details, including a definition of the task-completion […]
Faster practical modular inversion
December 20, 2025 If you’re looking to contribute to OSS, that’s your cue. Last year, Lemire wrote about an optimized variation of the Euclidean algorithm for computing the greatest common divisor of two numbers, called binary Euclidean algorithm or Stein’s algorithm. It’s a best-of-class implementation, though it’s currently only used by libc++. The post also […]
Anatomy of US inequality
Is income inequality in the United States primarily driven by disparities between ethnic groups or within them? The evidence reveals a striking pattern: 96% of U.S. income inequality arises from variation within groups sharing common ancestral origins, far overshadowing the comparatively small share attributable to differences between these groups. This pattern remains remarkably stable across […]
I wrote a code editor in C and now I’m a changed man
light ’ HolyCode [.] Praise God [.] If Vim/Neovim is Rust, light/HolyC is C. [.] Designed to get work done, convenient first, speed second. [.] You can look at the holy-code(light.HolyCode.c) distributed with this repository, to learn about the axioms of light ’ HolyCode. [.] There is almost no runtime overhead for the editor [.] […]
Claude in Chrome
Browser AI faces unique security risks, like prompt injection attacks, where malicious actors might try to trick Claude into unintended actions, such as sharing your bank information or deleting important files. While we’ve implemented protections, they aren’t foolproof. Attack vectors are constantly evolving and Claude may hallucinate, leading to actions that you did not intend. […]
Anthropic: You can’t change your Claude account email address
It’s not possible to change the email address associated with your Claude account at this time. When creating an account, please make sure you use an email you’ll have long-term access to. If you need to use Claude with a different email address, do the following: 1. If you have a paid plan (Pro or […]
Comptime – C# meta-programming with compile-time code generation and evaluation
A .NET source generator that executes methods at compile time and serializes their results to C# code. Comptime brings meta-programming capabilities to C#, enabling compile-time code generation and evaluation. Comptime allows you to mark methods with the [Comptime] attribute to have them executed during compilation. The return values are serialized into C# source code and […]
’LeBron James of spreadsheets’ wins world Microsoft Excel title
17 hours ago ShareSave Jamie McColganBBC News NI ShareSave MEWC Irishman Diarmuid Early emerged onto the HyperX arena in Las Vegas under the bright lights, dramatic music, and fanfare worthy of any major sporting final. Only this time, instead of a ball there was a keyboard and mouse, and the playing field a humble desktop […]
Programming languages used for music
4CED ABC This notation language was originally designed for transcribing Irish folk tunes, but has since evolved into a considerably richer language allowing, for example, polymetric output on multiple staves. This music notation format has the advantage of being extremely concise and fairly readable. AC Toolbox The AC Toolbox is a Macintosh PPC application to […]
Backing Up Spotify
annas-archive.li/blog, 2025-12-20, Discuss on Hacker News We backed up Spotify (metadata and music files). It’s distributed in bulk torrents (~300TB), grouped by popularity. This release includes the largest publicly available music metadata database with 256 million tracks and 186 million unique ISRCs. It’s the world’s first “preservation archive” for music which is fully open (meaning […]