Nexus
Nexus is a memory for AI assistants. Teach it your documents once. It keeps every fact, answers with the right one, and reads only what a question needs, which is why it costs so little to run.
Hand it a policy, a price list, a web page. It goes through them word by word.
Each fact gets a place of its own, next to everything it already knew. Nothing new pushes anything old out.
Can a worn helmet go back? Only the words that answer come forward. That is why it is right, and why it is cheap.
Right now Nexus is holding 9,450 memories in 6,606 brains. It learned them from 1,448 documents and pages, and has used them in 40,116 conversations.
Counted from the live system a few minutes ago. A brain is one assistant’s memory.
Small enough to run
ten thousand times in a day,
and still get it right.
Every new brain starts on
Anthropic’s newest small model, out since October 2026.
In our side-by-side tests on real support questions it answered more of them correctly than the model it replaced.
It looked the answer up in its memory before every reply in those tests, instead of going from what it thought it knew.
The same conversation now costs roughly one fifth of what it did on the previous default.
Any brain can move to Claude Sonnet 5 or Claude Sonnet 5.5, or to a model from your own provider with your own key.
A made-up bike shop, so you can check every answer against the page it came from. This example is scripted. The real thing is an API: you send documents, then questions.
Waiting
Waiting
Waiting
Kestrel Cycles assistantHas not been taught anything yet
Three documents go in. Then pick a question.
An assistant without a memory has to be handed everything it knows, again, with every question. You pay for all of it each time, and one day it no longer fits. Nexus brings back only the facts a question needs.
Handed everything, every time
Reads 1,000 pages for each question.
With Nexus
Reads the few lines that answer it.
An illustration, not a price list. A page here is about 500 words, and roughly 1,500 pages is the most a large model can read in one go.
No conversation and no document you give Nexus is used to train an AI model.
Ask for deletion at any time and get written proof once it is done.
Every customer’s memory is kept apart from everyone else’s.
The details are in the privacy policy and the data processing terms.
