decisionmodels releases s1-llm-auto-router, a 183 MB CPU router under MIT
A pruned mmBERT-small that answers seven routing questions in one CPU pass. The card reports 0.898 category accuracy on its held-out set.
Tagged router
Microsoft releases Decision-1, a 9B model that scores fixed answer options
Microsoft-Decision-1 returns a probability per answer option instead of prose. Hosted on Foundry and OpenRouter; no licence stated.
Amazon publishes Strands Decider 2B, a small decision model for agent workflows
A 2B LoRA on Qwen3.5-2B-Base, Apache-2.0, with a /v1/systemone server. The card reports 0.779 on 231 public JevBench tasks.
OpenAI opens its Decisions API in public beta, built on GPT-6 Luna
A /v1/decisions endpoint returns typed predicate, choice and score answers. Public beta, $0.10 per million input tokens, GA promised in weeks.
Perplexity releases pplx-decider, an Apache-2.0 27B decision model
pplx-decider-v1 and v1.1 are open-weight 27B models that return probabilities for fixed answers. Built on Qwen3.8-27B.
vLLM Semantic Router team releases Decision 2.0 open decision models
Decision 2.0 is an Apache-2.0 family from vllm-sr. The 27B Vega card reports 74.0 on JevArena. Lux is a 9B sibling.
TypeSafe AI launches Jev, a hosted model for typed software decisions
Jev takes state and typed questions and returns probabilities. Early access via API, $0.042 per million input tokens; weights not stated.
Katanemo releases Arch-Router 1.5B, a router that follows your own route descriptions
For context: a Qwen2.5-1.5B-based model that maps a query to a user-defined route and returns JSON. Released under the Katanemo licence.