Istvan

vp of engineering :: father of one :: ex-@Amazon, ex-@riotgames

[Istvan @lix]

@karpathy More like Anthropic joins Karpathy #what

[How To AI @HowToAI_]

The entire RAG industry is about to get cooked.

Researchers have built a new RAG approach that:

- does not need a vector DB.
- does not embed data.
- involves no chunking.
- performs no similarity search.

It's called PageIndex. Instead of chunking your docs and stuffing them into pinecone, it builds a tree index and lets the LLM reason through it like a human reading a book.

hit 98.7% on financebench. beats every vector RAG on the leaderboard.

no embeddings. no chunking. no vector DB.

100% open source.

[Mnimiy @Mnilax]

https://t.co/ziKNmzZkml

[Istvan @lix]

@0xglitchbyte A is better than B without qualification 🤷‍♂️

[Istvan @lix]

Unfortunately yes, we remember

[Theo - t3.gg @theo]

Remember when everyone said I was crazy for noticing how much Claude Code regressed?

[Istvan @lix]

@Hesamation Hoops

[Istvan @lix]

This is exactly the right way for most businesses domain apps (as opposed to highly specialized use cases)

[Hamilton Greene 🐷🦀 @SIRHAMY]

What if you just write Rust like a high-level, garbage collected language?

Turns out with a few rules you can basically get all its perf / type benefits with only a 10-20% per hit.

- Immutable types, functionalish pipes
- Arc + clone liberally
- DDD services

[Istvan @lix]

https://t.co/FSeiJCV1Kr

[Kyle Mistele 🏴‍☠️ @0xblacklight]

“Built in rust” is not a feature btw

[Istvan @lix]

I have very similar experience. Diversifying your LLM use is a must at this stage.

[Gergely Orosz @GergelyOrosz]

Anthropic really is burning more and more dev goodwill

Claude Code is suddenly getting unusable for stuff you could use it before (as in a day before!) and the AI now refuses to so stuff that it doesn’t think is strictly to do with software development.

No transparency why ofc

[Istvan @lix]

@fawadhsdev @icanvardar Bringing nuance to a meme war?? 🤷‍♂️

[Istvan @lix]

@icanvardar In what way?

[Istvan @lix]

@mjackson Something to do with being post 1.0 and stable tooling, async, packages for years?

[Istvan @lix]

@FFmpeg Moving to Zig is the only way if you want true bare metal performance 🎭

[Istvan @lix]

@Al_Grigor I am no sorry for this. Keep up the good work and create an AWS permission / role that does not have S3 delete + RDS access in the same profile. My deployment roles are like that to avoid this exact scenario.

[Alexey Grigorev @Al_Grigor]

Claude Code wiped our production database with a Terraform command.

It took down the DataTalksClub course platform and 2.5 years of submissions: homework, projects, and leaderboards.

Automated snapshots were gone too.

In the newsletter, I wrote the full timeline + what I changed so this doesn't happen again.

If you use Terraform (or let agents touch infra), this is a good story for you to read.

https://t.co/Mbi3oM4HMn

[Bo Wang @BoWang87]

Prof. Donald Knuth opened his new paper with "Shock! Shock!"

Claude Opus 4.6 had just solved an open problem he'd been working on for weeks — a graph decomposition conjecture from The Art of Computer Programming.

He named the paper "Claude's Cycles."

31 explorations. ~1 hour. Knuth read the output, wrote the formal proof, and closed with: "It seems I'll have to revise my opinions about generative AI one of these days."

The man who wrote the bible of computer science just said that. In a paper named after an AI.

Paper: https://t.co/juSOmK9vOt

[Can Bölük @_can1357]

https://t.co/1BGwJQxYxr

[Elliot Arledge @elliotarledge]

NVIDIA just dropped a banger paper on how they compressed a model from 16-bit to 4-bit and were able to maintain 99.4% accuracy, which is basically lossless.
This is a must read. Link below.

[Istvan @lix]

Nothing signals how great era we live in than getting approval to have the word “open” in your product from a company.🤷‍♂️

[Gergely Orosz @GergelyOrosz]

I like this final name better 🦀

Of course because Anthropic demanded the first name to be change (similarity to Claude) you might wonder if OpenAI could do the same the future.

In what is an absolute boss move @steipete called Sam and asked, then changed the name

[Istvan @lix]

They are in the web dev industry 🤷‍♂️

[Tzvetan Mikov @tmikov]

@charmcli What am I missing? Why is 3ms a good result?

[Istvan @lix]

@arram What are the data sources?