Decider 2B
MapikaOpen weightsNot yet run
A decoder-backbone System One reproduction with a proper-scoring-rule SFT stage and a calibration-aware RL stage; serves the /v1/systemone request shape.
Specifications
- Checkpoint
- Mapika/decider-2b
- Publisher
- Mapika
- Mechanism
- Decoder backbone with a scalar scorer
- Backbone
- Qwen3.5-2B-Base, SFT + outcome-rewarded RL
- Parameters
- 1.9B
- License
- Apache 2.0
- Runs as
- open weights, self-hosted
- Library
- decider (GitHub)
- Primitives
- Choice, Score, Noul
- Pricing
- none — your compute
Frequently asked questions
How does Decider 2B compare to Jev?
Decider 2B has not been run through the benchmark yet; the figures on this page are its authors' own and are not comparable to the leaderboard until a row exists.
Is Decider 2B open source?
Yes. Mapika/decider-2b is released under Apache 2.0 and runs on your own hardware with the decider (GitHub) library.
Can Decider 2B extract entities?
No. Decider 2B answers questions about text and never returns spans; use a GLiNER-family model for extraction.