Cortex @0xCortexq

Someone turned a physics textbook into a 3D book you can play with. The whole GCSE energy topic, built with Opus 5.5 and Three.js. Every lesson runs one loop: predict, test, prove. That loop is the real idea. A diagram hands you the answer. A model lets you guess wrong first, then shows you why. So I tried it on one page ↓ a pencil sketch stands up, the ball rolls, and the tubes show where the energy goes. Textbooks were flat because paper was flat. which subject should get this next?

Techartist @techartist_

3 days ago

Nine more lessons from my 3D book about energy, now covering the whole GCSE energy topic: kinetic, gravitational and elastic energy, heating, power, efficiency, energy resources and conservation of energy. Built with Opus 5.5 and Three.js. The full book ↓

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You've used a key every day of your life. Here's what actually happens inside the lock ↓ Wrong key: two pins stick across the line. Nothing turns. Right key: every gap lands on one line. Click. Elvar's guide turns any question like this into a machine you can click through, with one free Claude skill. Nobody skips a button. what everyday thing should I open up next?

Elvar @elvar_official

a week ago

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@WorkFarOfficial agreed, context that sticks around helps a lot. half the thinking goes into re-reading stuff it already knew

Nobody tells you this about AI pricing: the smarter the model, the longer it thinks. and you pay for every second of it. Everyone compares AI models by price per token. That's the wrong number. The 720K-view showdown below shows why: > Opus 5.5 has cheaper tokens than GPT-6 Astra, but writes far more of them per answer > faster per token doesn't mean it finishes first > so the cheap token quietly turns into the expensive job There's no "best model" anymore. There's a best model for each job: → judgment and long reasoning: pay for the big one → hard science and math: a different big one wins → the boring 90% (sorting, routing, first drafts): a small model does it for pennies The real skill now isn't picking a model. It's routing work between them. And the only number that matters is what it costs to get a result you can actually use, including the time you spend fixing it. paste this into Claude Code ↓ "Run my real task on two models at the effort I'd ship. Track tokens, time, attempts and how long I spend fixing the output. Give me one table: cost per usable result. Show me the plan first. Don't call any API until I say go." follow @0xCortexq for more AI breakdowns like this

Kinder @kinderlayer

2 weeks ago

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@zhangyifk zipper is a great one. all those little teeth locking together would look so good opened up

@elvar_official the 7 year old test is such a good rule. if a kid gets the hint, everyone does

@oliviscusAI robots practicing in a virtual warehouse before they ever touch a real one. wild that this is free

@shmidtqq cheap model reads, big model checks. makes way more sense than running opus on everything

@ryanvogel reviewing on paper actually makes you slow down and read. love this

@WaterrrMiao @HyperFrames_ 11 minutes in about 2 hours is wild. curious how long the script took

@Alacritic_Super search and rescue is the part that gets me. finding someone in a forest with no signal is huge

@0xCodez love that step 2 just says stop there if it's not supported

@Nyxera0x the opus one actually walks like it has weight. big difference

@RyanSael wish i had this back in school

@hqmank the screws going in from the wrong side is the most honest part of this. looks right at a glance, still needs someone who held the real kit

@AnnatarXBT forgetting being the layer nobody builds is so true. memory that never cleans up slowly turns into confident nonsense

@vib3coded the salmon fish ladder is such a nice detail. you can tell it was built to be played with, not just looked at

@exploraX_ following one carbon atom the whole way is such a good idea. kids remember a story way better than a list of organs

@Flinzu the come back empty-handed rule is underrated. a close-looking wrong answer costs way more than "not found"