11 self-hostable System One decision models as Jev alternatives in the EU
A roundup of Jev alternatives that can be self-hosted or processed in the EU, including Clef, d1, Tev1-4B, GLiNER2.5-Decide, Strands Decider 2B and the OpenAI Decisions API.
Building in the EU and want Jev? 11 open alternatives already run on your own servers. In case you missed it: TypeSafe AI launched Jev a month ago, their first "System One" model. Where an LLM writes you an answer, Jev only does multiple choice. You give it the context and the options, and it picks one (or gives a score) and says how confident it is. It's hosted in the US. There are already 15 other models doing the same job. Six that stood out to me: /1 Clef and Clef-flash (Cloudflare) Open weights under Apache-2.0, and also hosted on Workers AI. Takes text and images, and accepts Jev-style requests. /2 d1 (Liquid AI) Hosted, with text and image input. It returns the same three result types as Jev: Noul, Choice and Score. /3 Tev1-4B-experimental (Together AI) A Qwen3.5-4B fine-tune that picks from 2 to 24 options. Together also wrote up how to train your own. /4 GLiNER2.5-Decide (Fastino) A 340M-parameter encoder, tiny next to the rest. It also pulls out spans and relations, and it runs on a CPU. /5 Strands Decider 2B (Strands Labs) Open weights, training data and scripts, built for agent gates that run locally. /6 Decisions API (OpenAI) Went from limited preview to public beta on 6 October, added image input, and you only pay for the input tokens. Plus builds from Perplexity, Standard Thinking, meraGPT, Bespoke Labs, Mapika, Convai and individual builders like Jared Palmer. Jev is hosted in the US and I couldn't find an EU data residency option. Check the licence tags in the visual, and OpenAI's Decisions API offers processing in Europe. This is a snapshot, not a ranking. I haven't seen anyone test these side by side on the same decisions yet. Which one would you try first? 👀