[Image blocked: Decision-2.0-Kai-0.6B]
Decision-2.0-Kai-0.6B
Decision-2.0-Kai-0.6B is the 0.6B model of Decision 2.0, the decision models of vLLM Semantic Router. Give it an input (text or JSON) and the questions you need answered: pick one of several options, say yes or no, or rate on a scale. It answers them all at once and returns a probability for every answer, without generating text.
Highlights
- Top JevArena score of its size: 48.6, ahead of the 4 other same-size models compared.
- Ahead of Decision 1.0 Kai: +12.7 on JevArena and +9.8 on the Jev Decision Index.
- Speed: a median of 4.9 ms per single-question request on a single GPU.
- Many questions, one pass: Choice, Yes / No and Score questions about the same input are answered together in one forward pass, with a probability for every option.
Quickstart
Evaluation
JevArena
[Image blocked: JevArena: Decision-2.0-Kai-0.6B and same-size models]
[Image blocked: JevArena by decision type: Decision-2.0-Kai-0.6B and same-size models]
Every model answers the same frozen prompts, scored the same way; missing or invalid answers count as errors. Human-labelled transfer is the median macro-F1 over 15 human-labelled tasks (Γ100).
Jev Decision Index
[Image blocked: Jev Decision Index against model size]
[Image blocked: Jev Decision Index by area: Decision-2.0-Kai-0.6B and Decision 1.0 Kai]
Decision 2.0: independent reproduction with the official 0.2.1 kit on the released weights; others: public board snapshot, 2026-09-28. Training data audited at row level against all Index test items.
License
Apache-2.0 (LICENSE [blocked]).
Citation