Merantix AI Campus · Berlin · 2026

Four months.
Nine threads.
One residency.

Tebjan Halm & Geoffrey Kasenbacher

We didn't have
one big thing.

We had nine.

by the numbers

9
projects
1,654
tracked commits
2
people
6
months, ongoing

how it unfolded

Six codebases running in parallel

Feb
aither begins
Apr
musk, daily collab
May
routing-snn, hackathon
Jun
werft, 8K video
Jul
GBC, Halbach forms

01 · Tebjan

Aither

The idea machine.

23 → 9
ideas cataloged → real projects shipped

02 · Tebjan + Geoffrey

routing-snn

Beating dense — for less.

238.53 vs 241.98 perplexity 25% less compute

routing-snn

The longest-running thread.

662 commits 14 branches still committing today

Geoffrey's kernel + design doc → Tebjan's training loop, since May.

03 · Tebjan + Geoffrey, together

AI4Science
Hackathon

Built together. Under a clock.

~4 hours2 independent buildsautonomous science agent

04 · Tebjan + Geoffrey

gt-notes

The knowledge hub. Three real tools live here.

gt-notes → tool 1

Paper Reader

→ becoming a general-intelligence layer
for desktop & web.

9 versions in 10 dayssubscription chat + PDF + mind-map canvas

gt-notes → tool 2

The Knowledge Base

Verifies its own quotes.

44/44
tests green — ingest to synthesis, end to end

gt-notes → tool 3

The Podcast Pipeline

Audio in. Dubbed podcast out.

WhisperX + pyannotevoice-cloned re-dub~2× realtime

05 · Tebjan, solo

Werft

A product factory. Built in 3 days.

428
tests green · 2 shipped products

06 · Tebjan + Geoffrey

Attensor

Real-time video. Pushed to 8K.

8192×4096
tiled video diffusion — on one 16GB GPU

Attensor

Geoffrey's feature.
Tebjan's engine.

A real-time diffusion engine running since 2023 — this became the tech behind Halbach.

07 · Tebjan

GBC

280 years unsolved. We mapped the walls.

9 proof doors closed6 still opennot a proof — an honest map

08 · Tebjan

musk

A DJ that makes its own music.

16.9ms
per frame — real-time, 2.4× headroom

09 · where it's heading

Halbach

The company.

Halbach

Formerly Attensor. Founded on this work.

40× claimed speedupreal customers: Refik Anadol & others
SPRIND ask: €1.35MAI NATION deadline: Aug 9

Tebjan won "AI Builder Day" at Merantix — May 31, 2026.

still building

1.5 months left.

This is the midpoint, not the finale.