A 149.6M ModernBERT-base cross-encoder with a scalar head that picks an agent's next action or tool from labels and descriptions you supply. Each option is scored against the state and a softmax ranks the set; no text is generated. Experimental preview, not calibrated.
StartLux's decision family in six sizes, 0.8B to a 35B-A3B mixture of experts. All questions in a request are answered in one forward pass, with a probability for every option, through a TypeSafe /v1/systemone-compatible server. Text, JSON or images, up to 256K tokens.
Decides
choice, rank, route
choice, score, noul
Architecture
modernjev
startlux-decision
Fine-tuned from
answerdotai/modernbert-base
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License
apache-2.0
cc-by-nc-4.0
Availability
Open weights
Open weights
Hosted by
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Input price
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Decision accuracy
73.4%
88.3%
Calibration error
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Valid action rate
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Median latency
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26 ms
p95 latency
Figures are from each model’s manifest; accuracy and latency are what the publishers report, on their own suites and hardware. Add a third model.
Questions
What is the difference between modernjev-decide and startlux-decision?
modernjev-decide is from Maziyar Panahi and startlux-decision from StartLux. Both have open weights you can download and run. Both answer choice questions. Only modernjev-decide answers rank and route. Only startlux-decision answers score and noul. startlux-decision reads up to 256K tokens of state, against 4K tokens for modernjev-decide. modernjev-decide is the smaller model, at 150M parameters to 4.7B. modernjev-decide is licensed apache-2.0; startlux-decision, cc-by-nc-4.0.
Which is more accurate, modernjev-decide or startlux-decision?
They report on different suites — modernjev-decide 73.4% on AgentToolDecisions-180K held-out test, next action type (1,158 decisions, 3 choices; the maker's split), startlux-decision 88.3% on JevBench public set (231 items; 204 correct), maker's run — so the numbers do not rank them. Test both on your own labelled examples.
Which is cheaper, modernjev-decide or startlux-decision?
modernjev-decide: Free (open weights). startlux-decision: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Can I run modernjev-decide or startlux-decision locally?
Yes, both: systemone pull maziyar-panahi/modernjev-decide and systemone pull startlux/startlux-decision download the weights.
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Evaluation suite
AgentToolDecisions-180K held-out test, next action type (1,158 decisions, 3 choices; the maker's split)
JevBench public set (231 items; 204 correct), maker's run
