Patterns, frameworks, and tools from GitHub and RSS feeds
We thought about this carefully before choosing hyperbole; but it is warranted.
Our most agentic Sonnet yet, with top-tier intelligence for coding and everyday professional work.
Total Anthropic victory!
Our latest model, Claude Opus 4.8, is an upgrade to our Opus class of models, with stronger performance across coding, agentic tasks, and professional work, and the consistency to handle long-runni...
Anthropic's latest AI model is better at coding, sustaining tasks for longer and creating high-quality professional work.
Dreaming, outcomes, and multiagent orchestration are now available in Claude Managed Agents. Build agents that learn, meet a quality bar, and work in parallel.
The release candidate for the next Model Context Protocol (MCP) specification is now available: a stateless protocol core, the Extensions framework, Tasks, MCP Apps, authorization hardening, and a ...
Our latest model, Claude Opus 4.7, is now generally available. Opus 4.7 is a notable improvement on Opus 4.6 in advanced software engineering, with particular gains on the most difficult tasks.
Claude Opus 4.6 is here. There is a lot to say.
Weβre upgrading our smartest model. Across agentic coding, computer use, tool use, search, and finance, Opus 4.6 is an industry-leading model, often by wide margin.
The accidental "open sourcing" of Claude Code brings a ton of insights.
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>I use the term <strong>agentic engineering</strong> to des...
<blockquote cite="https://twitter.com/karpathy/status/2026731645169185220"><p>It is hard to communicate how much programming has changed due to AI in the last 2 months: not gradually and over ...
Early results from MirrorCode benchmark with METR: AI agents can complete weeks-long coding tasks, including reimplementing a 16,000-line codebase.
The new SOTA model asserts its dominance.
Only six weeks after Opus 4.7, we have Opus 4.8.
<p><strong><a href="https://www.anthropic.com/engineering/how-we-contain-claude">How we contain Claude across products</a></strong></p> A complaint I often have about sandboxing products is t...
In our first episode of 2026, swyx sits down with the cofounders of Artificial Analysis to discuss the state of LLM Evals and Benchmarks, and the key trends and drivers of LLM progress for the year.
<p><strong><a href="https://code.claude.com/docs/en/fast-mode">Claude: Speed up responses with fast mode</a></strong></p> New "research preview" from Anthropic today: you can now access a fas...
<blockquote cite="https://crawshaw.io/blog/eight-more-months-of-agents"><p>I am having more fun programming than I ever have, because so many more of the programs I wish I could find the time ...
<p><strong><a href="https://www.dbreunig.com/2026/01/08/a-software-library-with-no-code.html">A Software Library with No Code</a></strong></p> Provocative experiment from Drew Breunig, who de...
Introducing Agent Readiness Factory can now evaluate how well your codebase supports autonomous development. Run /readin...
<p>After two days of experience with <a href="https://simonwillison.net/2026/Jun/9/claude-fable-5/">Claude Fable 5</a> I think the best way to describe it is <strong>relentlessly proactive</st...
Built into the Claude Desktop app, Cowork lets users designate a specific folder where Claude can read or modify files, with further instructions given through the standard chat interface.
Coding agents cross a meaningful threshold with Opus 4.5.
<p><strong><a href="https://www.kimi.com/blog/kimi-k2-5.html">Kimi K2.5: Visual Agentic Intelligence</a></strong></p> Kimi K2 landed <a href="https://simonwillison.net/2025/Jul/11/kimi-k2/">i...
<blockquote cite="https://twitter.com/bcherny/status/2022762422302576970"><p>Someone has to prompt the Claudes, talk to customers, coordinate with other teams, decide what to build next. Engin...
<p><strong><a href="https://www.promptarmor.com/resources/claude-cowork-exfiltrates-files">Claude Cowork Exfiltrates Files</a></strong></p> Claude Cowork defaults to allowing outbound HTTP tr...
<blockquote cite="https://lethain.com/company-ai-adoption/"><p>My experience is that <em>real</em> AI adoption on <em>real</em> problems is a complex blend of: domain context on the problem, d...
Open Standards for Rich generative UI is all you need.
<p><strong><a href="https://z.ai/blog/glm-5">GLM-5: From Vibe Coding to Agentic Engineering</a></strong></p> This is a <em>huge</em> new MIT-licensed model: 754B parameters and <a href="https...
<p>It genuinely feels to me like GPT-5.2 and Opus 4.5 in November represent an inflection point - one of those moments where the models get incrementally better in a way that tips across an in...
<p>Last month I <a href="https://simonwillison.net/2025/Dec/15/porting-justhtml/">wrote about porting JustHTML from Python to JavaScript</a> using Codex CLI and GPT-5.2 in a few hours while al...
<blockquote cite="https://twitter.com/rakyll/status/2007239758158975130"><p>I'm not joking and this isn't funny. We have been trying to build distributed agent orchestrators at Google since la...
Anthropic’s new Cowork tool, Anthropic Raising $10 Billion at $350 Billion Value, Deep Delta Learning
<p><strong><a href="https://www.anthropic.com/news/claude-new-constitution">Claude's new constitution</a></strong></p> Late last year Richard Weiss <a href="https://www.lesswrong.com/pos...
<p><strong><a href="https://mitchellh.com/writing/my-ai-adoption-journey">Mitchell Hashimoto: My AI Adoption Journey</a></strong></p> Some really good and unconventional tips in here for gett...
<blockquote cite="https://twitter.com/dhh/status/2012543705161326941"><p><em>[On agents using CLI tools in place of REST APIs]</em> To save on context window, yes, but moreso to improve accura...
<p><strong><a href="https://steve-yegge.medium.com/the-ai-vampire-eda6e4f07163">The AI Vampire</a></strong></p> Steve Yegge's take on agent fatigue, and its relationship to burnout.</p> <bloc...
We are releasing Agent Skills for Postgres Best Practices to help AI coding agents write high quality, correct Postgres code.
<p>Something I like about our weird new LLM-assisted world is the number of people I know who are coding again, having mostly stopped as they moved into management roles or lost their personal...
<p><strong><a href="https://cursor.com/blog/scaling-agents">Scaling long-running autonomous coding</a></strong></p> Wilson Lin at Cursor has been doing some experiments to see how far you can...
A Claude Code skill for autonomous skill extraction and continuous learning. Have Claude Code get smarter as it works. - blader/Claudeception
How I use coding agents, and what I think they mean
<blockquote cite="https://www.robinsloan.com/winter-garden/agi-is-here/"><p><strong>AGI is here</strong>!βWhen exactly it arrived, weβll never know; whether it was one companyβs Pro or another...
Anthropic is developing a new Customize section for Claude, centralizing Skills, Connectors, and upcoming Commands for Claude Code.
<blockquote cite="https://steve-yegge.medium.com/software-survival-3-0-97a2a6255f7b"><p>Getting agents using Beads requires much less prompting, because Beads now has 4 months of βDesire Paths...
<p>New from Anthropic today is <a href="https://claude.com/blog/cowork-research-preview">Claude Cowork</a>, a "research preview" that they describe as "Claude Code for the rest of your work". ...
<p>New from Fly.io today: <a href="https://sprites.dev">Sprites.dev</a>. Here's their <a href="https://fly.io/blog/code-and-let-live/">blog post</a> and <a href="https://www.youtube.com/watch?...
Measuring the impact of Qwen, DeepSeek, Llama, GPT-OSS, Nemotron, and all of the new entrants to the ecosystem.