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Lumma-fev-0.6B: a Jev-like decision model goes open source

FrontiersMind fine-tuned a 0.6B decision model on its from-scratch Lumma-0.6B-Base that takes a document and typed questions and returns a probability for every answer in one forward pass, generating no text, for routing, triage and moderation.

FrontiersMind
@FrontiersMindArchived 2026.09.23Originally posted 2026.09.23
FrontiersMind @FrontiersMindOriginally posted 2026.09.23
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We’re excited to introduce Lumma-fev-0.6B, a Jev-like decision model fine-tuned on our from-scratch Lumma-0.6B-Base You give it a document and a set of typed questions, and it returns a probability for every answer in one forward pass. It generates no text, so there's nothing to parse and nothing to hallucinate. It's built for routing, triage, moderation and any workflow that needs a decision rather than a paragraph Try it: https://huggingface.co/FrontiersMind/Lumma-fev-0.6b And this is just the beginning, we’re planning to open-source 4B and 9B versions with a detailed benchmark report in the coming couple of days

x.com/frontiersmind/status/2102490560229720488Archived 2026.09.23 10:14