David Hartmann
The ARC-AGI-3 competitor notebook for David Hartmann: sourced background, observed team names and ARC Daily coverage.
Competition: ARC-AGI-3. Team ID: 16032816.
First observed by the newspaper: 2026-10-08T03:42:46Z. Last checked: 2026-10-08T03:42:46Z. Observation dates are not competition join dates.
Public team roster
What is on the record
The ARChitects’ own 2025 solution write-up credits David Hartmann under the Kaggle handle dvhrtm, alongside Jan Disselhoff (insanitycheck) and Daniel Franzen (dfranzen). The ARChitects — 2025 team solution (checked 2026-10-08T03:38:00Z)
The team’s 2025 technical report lists David Hartmann at Lambda, Inc. The ARChitects — 2025 technical report (checked 2026-10-08T03:38:00Z)