The company
Fabervant Teknoloji Anonim Şirketi (Fabervant) is a software company in Istanbul, founded by Cemil Güneş.
We are a small product studio. One product at a time goes to market - today that is GRIDIGMA - while the workshop keeps building the next ones. Some of what we learn while building is worth sharing, so we write it up and publish it with its method and its limits.
Live
A logic-grid puzzle game where every hint shows why the answer has to be true. A new puzzle every day, no ads in the game.
Skincare price comparison and dupe finder for shoppers in Türkiye.
dupari.com → AstrolectAn electional timing engine. It scores moments over time, shows why each one scores the way it does, and lets you weigh what matters to you.
astrolect.com →In the workshop
theFabricator, a fabrication tycoon game · CoDoList, project planning · NeEder, a local price guide · CashFlow, payroll cost planning · Meddah, illustrated audio dramas · ATSim and TEGlyx, gas-processing engineering tools · Ulak, in-app support messages · BooMoo, this-or-that voting.
How we build
Models from Anthropic, OpenAI and xAI rewrote puzzle text and translated it into 21 languages, then rated each other blind. 801 versions, 7,209 ratings, and what they told us.
September 2026 · GRIDIGMA Six models author a logic puzzle: which ones get through the game's own gates?Six models wrote the logic, clues and story of the same ten puzzles through the game's production checks. Who passed, how hard their puzzles were, and how long it took.
All research