Patterns, frameworks, and tools from GitHub and RSS feeds
We thought about this carefully before choosing hyperbole; but it is warranted.
Total Anthropic victory!
Claude Opus 4.6 is here. There is a lot to say.
<p><strong><a href="https://platform.claude.com/docs/en/about-claude/models/whats-new-sonnet-5">What's new in Claude Sonnet 5</a></strong></p> Claude Sonnet 5 came out <a href="https://w...
<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 ...
<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...
The new SOTA model asserts its dominance.
The accidental "open sourcing" of Claude Code brings a ton of insights.
Only six weeks after Opus 4.7, we have Opus 4.8.
<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.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...
<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><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...
Measuring the impact of Qwen, DeepSeek, Llama, GPT-OSS, Nemotron, and all of the new entrants to the ecosystem.
<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...
<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...
Open Standards for Rich generative UI is all you need.
<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...
<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...
<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 ...
Anthropic’s new Cowork tool, Anthropic Raising $10 Billion at $350 Billion Value, Deep Delta Learning
<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?...
Coding agents cross a meaningful threshold with Opus 4.5.
<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...
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://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...
<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://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...
<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>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><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/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...
<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...
<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://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...
<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...
<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>I didn't have early access to today's <a href="https://www.anthropic.com/news/claude-fable-5-mythos-5">Claude Fable 5</a> release, but I've spent the past ~5.5 hours putting it through its ...
The tools are getting so powerful that we need to change how we scope, manage, and approach our work.
<p>I was a speaker last month at the <a href="https://www.pragmaticsummit.com/">Pragmatic Summit</a> in San Francisco, where I participated in a fireside chat session about <a href="https://si...
<p>A key challenge working with coding agents is having them both test what theyβve built and demonstrate that software to you, their overseer. This goes beyond automated tests - we need artif...
<p>Two major new model releases today, within about 15 minutes of each other.</p> <p>Anthropic <a href="https://www.anthropic.com/news/claude-opus-4-6">released Opus 4.6</a>. Here's <a href="h...
<p><strong><a href="https://www.danshapiro.com/blog/2026/01/the-five-levels-from-spicy-autocomplete-to-the-software-factory/">The Five Levels: from Spicy Autocomplete to the Dark Factory</a><...
<p>Last week <a href="https://simonwillison.net/2026/Jan/28/the-five-levels/">I hinted at</a> a demo I had seen from a team implementing what Dan Shapiro called <a href="https://www.danshapiro...
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>The defining characteristic of a coding agent is that it c...
Less than a week after completing coverage of Claude Mythos, here we are again as Anthropic gives us Claude Opus 4.7.
<p><strong><a href="https://www.simonpcouch.com/blog/2026-01-20-cc-impact/">Electricity use of AI coding agents</a></strong></p> Previous work estimating the energy and water cost of LLMs has...
<blockquote cite="https://jasmi.news/p/claude-code"><p><strong>If you tell a friend they can now instantly create any app, theyβll probably say βCool! Now I need to think of an idea.β</strong>...
<blockquote cite="https://twitter.com/voooooogel/status/2014189072647078053"><p>[...] i was too busy with work to read anything, so i asked chatgpt to summarize some books on state formation, ...
Claude desktop app has Claude Code now