What happened
Jeff, a small decision model packaged like Jev, comes in three versions built on Qwen3.5 0.8B, Qwen3.5 2B and Gemma 4 E2B, with a decision taking about 22 milliseconds on RTX PRO 6000 and 28 milliseconds on M4 Max.
What to watch
Jeff's README stresses it does not reason, and its backers say no model of this parameter size should be expected to handle multi-step reasoning, so its edge looks confined to fast, narrow choices.
WHO IT HITSDevelopers and product teams who want a small decision model running on their own hardware, rather than through a cloud API, are the ones this lands on, since the weights and code are openly published.
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