AWS releases a 1.9B local decision model

Amazon Web Services released Strands Decider 2B, a 1.9-billion-parameter open decision model that returns choices, yes/no answers, or scores instead of prose. The Strands Decider repository reports 0.723 accuracy on 231 public JevBench tasks and median 115-millisecond latency on an RTX 3090; the launch report says it is built on Qwen3.5-2B and runs locally. Treat it as a routing or pre-tool checkpoint, not a generative-model replacement; the archive’s Jev analysis separates typed output safety from semantic accuracy.