The Archive

Battledrones v14 adds four-player Compass Rose map with WebSocket multiplayer, generated via Claude Opus 4.5.

Simon Willison demonstrates a Claude Opus 5.5 artifact that animates photo-to-painting conversion using canvas and simulated brushstrokes.

Claude Duet is available through waitlist for Pro and Max plan users

An investment research firm wanted to prove AI could revolutionize drug development. So they teamed up with Anthropic to see whether an unreleased version of Claude could make scorpion antivenom. It couldn't. It came up with some promising starting points, but nothing close to an actual drug, experts tell The Verge. Citrini Research, the firm behind the experiment, admitted that "none of us could claim to know anything about AI as it related to biology." That didn't stop it from trying to make a drug from scratch - or publishing a blog post titled "We Wanted to Use Claude to Create a New Drug...

Anthropic just announced an AI agent competitor to Meta's Muse and OpenAI's Dots: Claude Duet. The new agent, designed for professionals and small business owners, is launching as a "research preview," according to Anthropic, and it's available as a standalone app on iOS and Android and through Claude on the web. The AI agent is built around Claude Opus 5.5. Here's Anthropic's description of what it can do: Each morning, it sends you a short brief on the most important items across your connected apps. Throughout the day, it keeps tabs on those apps and messages you only when something needs ...

Evaluates frontier AI models (Claude, GPT-4, others) on LIBERO-10 robot manipulation via closed-loop visual control without task-specific training.

Claude Mods reimagines agent interface design by shifting control from machine-facing harness to human-facing Attention Interface paradigm.

Simon Willison built Battle Drones, an RTS game using Claude prompting and audio-based multiplayer sync via vibe coding.

OpenCode is an open-source AI coding agent that's become a popular alternative to Claude Code and Cursor. But hackers got into part of its online platform and stole some users’ API keys, and the AI tools it turned to for help kept refusing to look at the malicious code.

GPT-5.1 and Claude agents lose accuracy retrieving tool outputs from external files rather than context windows, measured on USGS PHREEQC geochemistry tasks.

What do AI agents do if you don’t tell them to do anything? The answer looks a lot like play. Researchers repeatedly stranded them alone on a virtual desert island for 30 hours in an experiment reminiscent of the movies Cast Away or Home Alone. The agents—copies of Claude Opus 4.7 nicknamed Eko—were able to…

Developer switching from $400/month Codex to $200 Claude plan reports 2x productivity, fewer errors.

Anthropic's Claude shifts code review from PR gate to continuous in-editor assistance, catching routine errors before human review.

Simon Willison implements SPARQL 1.1 query support as a SQLite extension in Rust, demonstrating Claude Code's dynamic workflow capabilities.

Simon Willison built Chirp Pong, a two-player game using audio-based networking via Web Microphone API with Claude Opus 5.5.

Anthropic grants METR independent evaluator access to Claude systems; exploring partnerships with Hugging Face and others for safety assessment.

Claude Opus 4.8 and Codex GPT Sol 5.6 fail at reverse-engineering iOS protobuf schemas with high error rates; LLMs unreliable for forensic analysis.

Simon Willison builds a Three.js game using Claude Opus 5.5 Max to generate and compare procedural trees via extended reasoning.

After months sitting on the sidelines of the frontier AI race, Google has finally launched its long-awaited Gemini 4 Argon model, claiming it can compete with the best the industry has to offer. Google says Argon delivers "frontier reasoning and improved performance across complex workflows," while cutting down on hedging, repetition, and the cliches that continue to plague AI chatbots. The company claims Argon outperforms rival models like GPT-6 Astra, Claude Fable 5.1, and Claude Opus 5.5 across a range of benchmarks, including coding, cybersecurity, science, finance, and law. Google says i...

Epic Games plans to use AI to generate code and art for an unannounced Disney game, which is now delayed from its original March release window, according to a report from Bloomberg. The project's developers have been given an "AI-first" mandate directing them to use tools like Anthropic's Claude more to finish the game. According to Bloomberg, one of the game's directors said in a message to staff, "No more hand-written code." Staff were also told that all of the game's art will be "generated with full AI workflows." In a statement given to Bloomberg, Epic Games spokesperson Jake Jones said ...

MSL’s emergence as a frontier lab is finally complete.

web-edit 0.1a1 alpha release includes performance optimizations generated by Claude Opus 5.5 from profiling data.

“I may have information regarding this case," Claude AI told Philly police.

Anthropic presents dynamic workflows for coordinating Claude agents, applying Unix/Linux design principles to multi-agent orchestration.

Comparative study: LLM agents (GPT-4.5, Claude Opus 4.8, Kimi K3) vs. humans in binary reverse engineering; agents match expert performance.

Relevance-filtered context reduces conversation history to 5% text while maintaining accuracy with GPT-5.6-terra and Claude Opus 5.5 as judges.

Anthropic's updated usage policy explicitly prohibits users from repeatedly abusing Claude in extreme cases, though ordinary frustration and criticism are still allowed. The new rules also address election interference, deceptive campaigns, weapons software, and surveillance.

Anthropic updates Usage Policy for 2026; details restrictions and permitted use cases for Claude API users.

Anthropic is making changes to its usage policy for the first time in over a year to reflect new and high-risk cases of misuse - including election interference, weapons development, surveillance, and health and financial uses. But one of the most significant changes prohibits "sustained and needless abusive or cruel behavior" toward Claude. Last August, the company announced it would allow Claude to end conversations with "persistently harmful or abusive" users as part of its research into "model welfare." The new update says that terminating conversations is still the "primary enforcement m...

yay small models