This blown my mind... @claude Opus 5.5 built this open world game based in Valencia (Spain). Real street layout by @openstreetmap and texture/ambient inspired by streetview. +1.500 streets, +480Kms of driving paths, ~70.000 trees, almost half a million objects in the entire city, and tons of mini-games inside, all running in a browser #vlc-city

Fully agree with @dhh and if you don’t know how to start coding with AI seriuosly, have a look to Learn AI Press books More than 1.000 readers already acknowledge Claude Code Advanced as one of the best Claude Code books outhere learnaipress.com/

Still can't believe how beautifully can @claudeai opus 5.5 draw with javascript, but I'm more amazed that it can create perfect music and FXs. Fully in love with this short concept story. Voice with eleven labs claude.ai/artifact/ST9YvGyc8…

Asked @OpenAI Astra to build a 3D model of human eye so I better understand my myopia oculus-eye-atlas.sesame-hr-0…

live at claude.ai/artifact/Lzh8GzsHQ… "build an art project which is a fractal visulizer (mandelbrot, etc), but the styles look like handcrafted with paper, cardboard and such. Add post-procesing so it looks cinematic. Also want to use beautitful elaborated animations and transitions and a beautiful UX. Plan it first, show me a preview before coding everything"

so much happening these days at @claude_code Barcelona, Monday participating in the Claude Conversations, Tuesday I was happy to give away 3 copies of my book Claude Code for CTOs, today driving the HR workflows workshop. The claude community house concept itself is amazing

Can someone respond these two simple questions about Jev? - is it deterministic? Same input always delivers same output? - for the sake of transparency, is there a way to explain how the algorithm behind it works? Or is it just a black box? That would make it avoidable in many enterprise cases

It’s clear that Astra knows how to use post-processing…

Please stop using the word “just” for spreading news from ages ago. Whatever Jack Dorsey published two weeks ago is not news anymore

“Claude Code Advanced” updated, english and Spanish edition ⭐️⭐️⭐️⭐️⭐️ Three changes since the June edition: •Sonnet 5 takes over from Sonnet 4.6 as the default model. It's the biggest jump the Sonnet tier has made: Opus-level quality on coding and agentic work at Sonnet pricing, plus a 1M context window, xhigh effort, and high-resolution vision. It also ships a new tokenizer that counts roughly 30% more tokens for the same text, so the cost and context-rot tables have been recomputed. The whole guide is aligned with Haiku 4.5 → Sonnet 5 → Opus 4.8 → Fable 5. •New Fable 5. The first model of the Claude 5 family opens the Mythos class, above Opus, and earns a chapter of its own: when it pays off in Claude Code, how to use it as the orchestrator of subagent fleets, and the API's executor/advisor pattern, where a faster model consults Fable mid-generation. The appendices shift accordingly (Quick Reference becomes 17, and Resources 18). •OpenClaw leaves the book. It was a third-party open-source project and fell outside the scope of this guide, which centers on Claude Code and its official harness. Its niche — automation that runs when you're not around — is covered today by /schedule and remote triggers. learnaipress.com/

Claude Code for CTOs book got updated with ultracode, dynamic workflows and Opus 4.8 learnaipress.com/libro/claud… This book focuses on deploying Claude Code at scale in an organization and all the technical, team and business challenges a CTO and tech leads face to do so.