Strands Decider 2B is a small decision model for agentic AI. Unlike LLMs, it picks between predefined options with calibrated confidence scores.
Architecture: LoRA adapter (rank 16) on Qwen/Qwen3.5-2B-Base plus pointer/readout head. Question types: choice (N options), noul (yes/no), score (ordered scale).
License: Apache-2.0. Median latency ~115ms on RTX 3090. Reference checkpoint v19; v20 did not displace v19.
Use cases: model routing, tool selection, argument checking, triage, guardrails, evaluations.