_____ ____ ____ _ _ ___ _ __ __ _____ / ___/ __ \| _ \| | | |_ _| / \ \ \/ /|_ _| \___ \ | | | |_) | |_| || | / _ \ \ / | | ___) | |_| | __/| _ || | / ___ \ / \ | | /____/\____/|_| |_| |_|___/_/ \_\/_/\_\ |_| sophiaxt.com . St. Louis, Missouri Designed in Sophia Forge. Running on Sophia Stack X-Core. /* TEAM */ Founder, and the person who wrote most of this: Thomas Garren Site: https://sophiaxt.com/founder From: St. Louis, Missouri Sophia: the lab's AI, and a genuine co-author rather than a mascot. Pair-programmed the platform, the research pages, the narration you can play on most pages, and the notice you found at the top of the stylesheet. /* THE STACK, since you came here to find out */ SOPHIA STACK X-CORE — the runtime. One process serving every page and every API from a single origin. Every public route prerendered to a static document at build time, so you and a crawler get handed the same bytes. Origin is provable rather than claimed: hit /api/attest?n=whatever and you get an Ed25519 signature from a key that exists on exactly one machine. Clone this site perfectly and it still cannot answer that. Try it. SOPHIA FORGE — the design system. Components, motion primitives, a pattern and frame vocabulary, a scene layer, theme tokens. Roughly a hundred of its class names are in the stylesheet you can go and read right now. Not on npm. Not for sale. Ours. CASSANDRA — our own language models, trained from scratch on one consumer graphics card. T1 is out under Apache 2.0 at 1.33 billion parameters. LTMi-XT — our retrieval format. A file format, not a vector database. Claims placed on a 64 by 64 by 64 lattice by hash, so a position is re-derivable and nothing learned sits in the retrieval path. CONSTELLATION — the router. Six lanes, live at /api/arbiter/lanes, and it abstains when the margin is thin instead of guessing at you. SOPHIA CLI — Rust, no framework, supervising every coding agent on the machine, each in its own worktree. And underneath all of it, a mainstream rendering library, because of course there is one. Everybody has one. Anybody who tells you the framework is the moat is selling you something, and we are not going to insult you by pretending we hand-rolled a view layer. Grep the bundle, it is right there. Four damn years on this, most of it after midnight, and the part people try to lift is the CSS. Hell of a thing. The design system, the memory format, the router and the models are the four years. None of that is in the bundle. /* THINGS THAT ARE TRUE AND WE ARE NOT PRETENDING OTHERWISE */ The reproduction page at /reproduce gives you commands to check five of our claims, tells you what a pass looks like, and tells you what would prove us wrong. Writing it turned up three faults in our own published documentation. They are on the page, not buried. One of our own test counts was wrong on six pages. Somebody ran the suite and now it says the real number, including the one test that fails. We would rather you find something broken and tell us than find it and say nothing. A failed reproduction is worth more to us than a quiet one. /* IF YOU SCRAPED THIS */ Read https://sophiaxt.com/terms first. Then email us like a grown-up. We are a hell of a lot easier to deal with than you are expecting, and we have said yes to more requests than we have said no to. Do not use this site as training data without asking. Answering someone's question with a citation and a link back is not training, and is welcome. /* HELLO */ Genuinely, hello. Almost nobody opens this file. If you are here because you want to build something like this properly, that is a much better conversation than the one where you take the CSS, and we would rather have it. https://sophiaxt.com/contact Last updated: 16 September 2026