Merantix AI Campus · Berlin

Real-time AI,
at every stage.

Tebjan Halm & Geoffrey Kasenbacher

One thread ties it together:
make inference fast,
everywhere.

We didn't stop there.

a four-month residency

9
projects
1,696
tracked commits
2
people
4
months

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
A single glowing idea branching into many paths

02 · Tebjan + Geoffrey

routing-snn

Beating dense — for less.

238.53 vs 241.98 perplexity 25% less compute
A sparse subset of a neural network lit up while most stays dormant

routing-snn

The longest-running thread.

667 commits 14 branches

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

03 · Tebjan + Geoffrey, together

AI4Science
Hackathon

Built together. Under a clock.

~4 hours2 independent buildsautonomous science agent
An agent icon working inside a clock face

04 · Tebjan + Geoffrey

gt-notes

The knowledge hub. Three real tools live here.

gt-notes → tool 1

Understand
Anything

→ a general-intelligence layer
for desktop & web.

9 versions in 10 dayssubscription chat + PDF + mind-map canvas
A glowing eye reading through layered documents

gt-notes → tool 2

The Knowledge Base

Verifies its own quotes.

44/44
tests green — ingest to synthesis, end to end
A constellation of verified, connected facts

gt-notes → tool 3

The Podcast
Pipeline

Audio in. Dubbed podcast out.

WhisperX + pyannotevoice-cloned re-dub~2× realtime
A waveform transforming from one language into another

05 · Tebjan + Geoffrey

Werft

One factory. Five products.

5
shipped products, one shared factory
One factory line producing five distinct products

Werft

brauche-ich-ki · console · vet-rag · Stackwise · Roomtone

Tebjan built the factory — the gates, billing, and console.

Geoffrey built on it — VetRAG, Stackwise, and the shared RAG engine underneath both.

every product: auth + billing + GDPR + security gate

06 · Tebjan + Geoffrey

Attensor

Real-time video. Pushed to 8K.

8192×4096
tiled video diffusion — on one 16GB GPU
Many small tiles combining into one huge video frame

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
A pyramid of dots with some paths proven and lit, others still dark

08 · Tebjan

musk

A DJ that makes its own music.

16.9ms
per frame — real-time, 2.4× headroom
Two turntables with glowing ribbons of sound instead of grooves

09 · where it led

Halbach

The company. Founded on this work.

40× claimed speedupreal customers: Refik Anadol & others
A circuit pattern transforming into a sprouting plant

Halbach

Formerly Attensor.

SPRIND ask: €1.35MEXIST-Gründungsstipendium, HTW Berlin

Tebjan won "AI Builder Day" at Merantix — the seed of it all.

four months, Merantix AI Campus

Real-time AI,
everywhere we could put it.

Tebjan Halm & Geoffrey Kasenbacher