Lumen

Research

Notes from the long night

We publish what we learn — including the parts that did not work.

Papers & notes

Selected work.

2026 · 04

Long-horizon reasoning without forgetting

A memory schedule that keeps week-scale context coherent while holding compute flat.

2026 · 02

Citations as a first-class output

Training signals that make models prefer verifiable claims over fluent ones.

2025 · 11

The critic gap

Why self-critique improves precision but collapses recall, and how to reopen it.

2025 · 07

Evaluation you can argue with

Team-authored rubrics beat public benchmarks for predicting real-world usefulness.

Principles

Three commitments we do not trade away.

They shape what we publish and what we refuse to ship.

Legibility

If a result cannot be explained, it is not a result.

Contestability

Any claim the system makes must be challengeable by a person.

Restraint

Capability without a use we understand stays in the lab.