The latest on Anthropic's Claude models (Sonnet, Opus) — context windows, tool use, coding strength — with battle-tested Claude prompts.
Anthropic's Claude line spans Sonnet (balanced and fast) and Opus (deeper reasoning, long context). Claude is a common pick for writing-heavy work, long-document tasks, and agentic coding. This hub follows model updates, context-window and tool-use changes, and surfaces Claude-tuned prompts from Oort you can clone and run with your own key.
<p>The most interesting thing about <a href="https://www.anthropic.com/news/series-h">Anthropic's $65B Series H announcement</a> is this line (emphasis mine):</p> <blockquote> <p>Since our Series G in February, adoption…
<p>Anthropic shipped <a href="https://www.anthropic.com/news/claude-opus-4-8">Claude Opus 4.8</a> today. My favourite thing about it is this note in the release announcement:</p> <blockquote> <p>Users will find Opus 4.8…
<p><strong>Release:</strong> <a href="https://github.com/simonw/llm-anthropic/releases/tag/0.25.1">llm-anthropic 0.25.1</a></p> <blockquote> <ul> <li>New model: <a…
Anthropic's Claude Opus 4.8 brings dynamic workflows and cheaper fast mode to Claude Code, now in research preview The post Anthropic Ships Claude Opus 4.8 Alongside Dynamic Workflows and Cheaper Fast Mode, With…
<p><strong>Tool:</strong> <a href="https://tools.simonwillison.net/markdown-svg-renderer">markdown-svg-renderer</a></p> <p>A slightly customized Markdown rendering tool with special treatment for fenced code SVG blocks…
Anthropic has closed a $65 billion Series H round at a $965 billion post-money valuation, marking what could be the AI startup's final private fundraise before a highly anticipated IPO.
Here’s why Anthropic and OpenAI are on board with Illinois safety testing.
The new Opus model comes with a tool called Dynamic Workflows, for coordinating swarms of subagents.
Anthropic is releasing Claude Opus 4.8 on Thursday, and the company is touting the model's "honesty." According to Anthropic, it trains "all [its] models to be honest - for instance, to avoid making claims that they…
Elon Musk is publicly reframing xAI’s massive Anthropic compute deal as short-term and cancellable, despite SpaceX’s own S-1 filing describing payments through May 2029.
NVIDIA researchers have introduced Polar, a rollout framework that trains language agents using reinforcement learning without modifying their agent harnesses. Polar places a model API proxy between the harness and the…
<p>Anthropic are <a href="https://techcrunch.com/2026/05/20/anthropic-says-its-about-to-have-its-first-profitable-quarter/">strongly rumored</a> to be about to have their first profitable quarter. Stories <a…
By the time that the Democratic primary for New York's 12th congressional district wraps up in June, Anthropic and OpenAI will have spent millions on their battle over the political future of AI: who gets to regulate…
<blockquote cite="https://twitter.com/quinnypig/status/2058960462256210268"><p>I cannot believe I'm saying this, but getting the literal Pope to canonize your product's specific technical limitations as a spiritual…
<p><strong>Tool:</strong> <a href="https://tools.simonwillison.net/usborne-mad-house">Mad House — Usborne Creepy Computer Games</a></p> <p>Via <a href="https://news.ycombinator.com/item?id=48258194">Hacker News</a> I…
This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. Anthropic’s Code with Claude showed off coding’s future—whether you like it or…
<p>We just <a href="https://datasette.io/blog/2026/datasette-agent/">announced the first release of Datasette Agent</a>, a new extensible AI assistant for Datasette. I've been working on my <a…
<blockquote cite="https://www.sec.gov/Archives/edgar/data/1181412/000162828026036936/spaceexplorationtechnologi.htm"><p>We have the ability to use compute resources to support our proprietary AI applications (such as…
<p>Today at Google I/O, Google <a href="https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-5/">released Gemini 3.5 Flash</a>. This one skipped the <code>-preview</code> modifier and went…
Railway , a San Francisco-based cloud platform that has quietly amassed two million developers without spending a dollar on marketing, announced Thursday that it raised $100 million in a Series B funding round, as…
The artificial intelligence coding revolution comes with a catch: it's expensive. Claude Code , Anthropic's terminal-based AI agent that can write, debug, and deploy code autonomously, has captured the imagination of…
Alfred Wahlforss was running out of options. His startup, Listen Labs , needed to hire over 100 engineers, but competing against Mark Zuckerberg's $100 million offers seemed impossible. So he spent $5,000 — a fifth of…
Salesforce on Tuesday launched an entirely rebuilt version of Slackbot , the company's workplace assistant, transforming it from a simple notification tool into what executives describe as a fully powered AI agent…
Anthropic released Cowork on Monday, a new AI agent capability that extends the power of its wildly successful Claude Code tool to non-technical users — and according to company insiders, the team built the entire…
Nous Research , the open-source artificial intelligence startup backed by crypto venture firm Paradigm , released a new competitive programming model on Monday that it says matches or exceeds several larger proprietary…
OpenAI and Anthropic share findings from a first-of-its-kind joint safety evaluation, testing each other’s models for misalignment, instruction following, hallucinations, jailbreaking, and more—highlighting progress,…