Run Decision Models on vLLM and Red Hat AI Using DiffusionGemma
TypeSafe AI's Jev model has gained attention for providing fast, structured probabilistic decisions, but its closed-source nature limits enterprise adoption. The vLLM community has developed a method to run similar decision-making capabilities using the open-source DiffusionGemma model. This approach leverages parallel denoising to generate typed answers with confidence scores, enabling self-hosted, low-latency decision engines.
- ▪Jev is a 'System One' model that returns typed, probabilistic decisions rather than generating free-text responses.
- ▪DiffusionGemma is a block-diffusion language model with 26B total parameters and 4B active parameters that processes tokens in parallel.
- ▪vLLM PR #57250 introduces a structured-read mode that allows DiffusionGemma to function as a decision engine by reading probability distributions from a single forward pass.
- ▪This open-source solution addresses enterprise needs for self-hosted, low-latency decision-making without relying on third-party hosted APIs.
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| Original publisher | Red Hat Developer |
| Canonical URL | https://developers.redhat.com/articles/2026/09/28/run-decision-model-vllm-and-red-hat-ai |
| Publication time | Tue, 29 Sep 2026 03:13:02 +0000 |
| Retrieval time | 2026-09-29T03:24:29.094Z |
| Last seen | 2026-09-29T03:24:29.094Z |
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Run decision models on vLLM and Red Hat AI using DiffusionGemma Decision models like Jev are having a moment. Here's how to run one on vLLM and Red Hat AI today. September 28, 2026 Lucas Wilkinson Rob Greenberg Related topics: Artificial intelligence Related products: Red Hat AI Table of contents: Why Jev went viral, what "System One" models are good for, and how the vLLM community turned DiffusionGemma, already a Red Hat AI validated model, into an open, self-hostable decision engine.A new shape of modelOver the last couple of weeks, a new kind of model took over developer feeds. Jev is the first model from TypeSafe AI, a San Francisco startup founded by former OpenAI researcher Diogo Almeida. Jev doesn't chat or write.
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