Show HN: An open source alternative to JEV

Category: ai-ml

Tags: llm, classification, calibration, transformer, inference, pytorch

Score: 7.8/10 (Innovation: 8, Technical: 9, Documentation: 8, Utility: 6)

Decider is an open-source reproduction of TypeSafe AI's 'System One' model class: a 2B language model that, instead of generating text, reads a state plus typed questions and returns calibrated probability distributions in a single forward pass. It introduces a schema-first layout with prefix caching so fixed question sets compile once, and achieves strong accuracy/calibration on ~94 public tasks with an Apache-2.0 release.

Target audience: ML engineers, backend devs building decision/routing systems, AI researchers

Repository: https://github.com/Mapika/decider · Python · Apache-2.0 · 23 stars

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