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Jeeves. Reasoning improves Jev-like decision models

214 points • by nicowaltz • today at 11:13 AM • 85 comments • view on HN

Comments

sharih • today at 1:06 PM

What is the point of this, if it is p90 17 seconds? Might as well use an LLM. The beauty of Jev is that it is dirt cheap and insanely fast.

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TN1ck • today at 1:39 PM

I just did a run with a benchmark I just used to test other models against. (It's about detecting irony in german soccer tweets). On my M5 Pro with 48GB it took over 30min to decide on just 100 tweets, the thinking definitely takes long.

It performed quite below Jev, but above other open decision models I tested (68 correct vs 79 correct for Jev - see [1]). I'm running it for the moderation benchmark as well, but that will probably take a few hours on my machine.

[1] https://tn1ck.com/blog/jevdit

thm • today at 12:40 PM

Ask Jeeves - Only took us 30 years to come full circle.

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itzikkatz • today at 4:59 PM

Cool engineering, but 17s p90 latency kind of defeats the point of a Jev-class model, which is supposed to be fast and cheap. Losing 10 points on MMLU along the way doesn't help.

trencedamp • today at 8:28 PM

Jev noob here. I'm seeing all this jev talk and I understand the difference between this and normal models, but what are some actual use cases for jev?

theanonymousone • today at 2:44 PM

This reminds me of "on-premse cloud".

teravor • today at 2:47 PM

you don't need to post-train anything for this.

just get an LLM to think and then force it to output a specific json with prefill post-think.

make sure to include good conditioning text in the prompt with examples of exactly what the output should be like. you don't want dissonance in the probabilities on the prefill.

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alienbaby • today at 11:37 AM

Just curious, where has this term 'noul' come from for yes/no ansers?

/a bit more digging and..

A Noul performs a Bernoulli trial—an experiment with exactly two outcomes (yes or no)—but instead of picking one, it returns the calibrated probability (ranging from 0.0 to 1.0) that the statement is true.

I hate it :)

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winddude • today at 5:09 PM

That completely defeats the point of something to make decisions faster.

swader999 • today at 12:21 PM

Seems like this is the way, a hybrid approach where some of the pipeline will be jev like and some traditional LLM depending on the nature of the work.

zerop • today at 11:58 AM

Are there "good" Open source Decision models built on Gemma-4 and also trainiable on own data?

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HarHarVeryFunny • today at 5:14 PM

The number of people who feel the need to try and argue that you don't need Jev can only be astroturfing by those with something to lose - Anthropic and OpenAI employees.

Like it or not, companies are going to use Jev unless you can offer something just as cheap and fast.

I wonder just how much of the business automation market, previously held by LLMs, is at risk here?

swingboy • today at 2:31 PM

Any good classifiers like this or Jev that support image input?

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druskacik • today at 3:13 PM

How's the performance compared to ordinary 9B LLM with structured outputs? Both accuracy and speed?

RamblingCTO • today at 12:40 PM

Super dope. If it would ship as prod ready code supporting mps as well that would be even doper.

But funny that jev is getting its lunch eaten apparently in under two weeks?

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woadwarrior01 • today at 12:17 PM

This isn't really surprising. LLM reasoning and before that, chain of thought prompting are essentially forms of test-time compute scaling.

loclol101 • today at 1:56 PM

How general really are these jev type models? Has anyone done any broad very cross-domain eval on them?

Naitik88 • today at 12:45 PM

what about benchmark against smaller or bigger models? 9B looks too small for llm-level decisions.

AnodicElegy • today at 12:56 PM

I'm surprised we haven't seen a "Jehovah" yet.

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mxkuzn • today at 12:40 PM

interesting bench list, what about benchmark against smaller or bigger models? 9B looks too huge for small like laya, and too small for llm-level decisions.

quantized_state • today at 2:36 PM

The diffusion drafter adaptation is nice

captainbland • today at 12:43 PM

See if it can beat Jev's Pokémon benchmark

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raverbashing • today at 12:04 PM

Jeeves, that's a name I haven't heard in a long time...

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singularity2001 • today at 3:09 PM

In my experience, Jev is only faster because it's a small shitty model. Any objections?

speedping • today at 6:28 PM

Meh. Wake me up when it reasons in latent space and answers in less than a second

esafak • today at 1:23 PM

Jev-like models give calibrated decision probabilities, but at low accuracy.

So why didn't they show both??

phplovesong • today at 12:30 PM

So "askjeeves" has been resurrected?

SV_BubbleTime • today at 5:32 PM

“Somehow Jeeves returned…”

hjun1052 • today at 11:50 AM

If the model does autoregressive reasoning before the decision, doesn't that give up much of what a Jev-style model buys you (a single forward pass, cheap calibrated probabilities)? Or is the point mainly to keep the typed output and probability interface while getting better accuracy on harder cases?

mabini • today at 1:22 PM

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