A 4B biomedical decision model by Dimitris Papadopoulos: Qwen3.5-4B tuned with Together AI's Tev1 recipe on 1.75M pharma, clinical-trial and literature decisions. One forward pass gives a temperature-scaled probability per option. Research use only.
A 4B decision model fine-tuned from Qwen3.5-4B-Base. A state and typed questions (choice, yes/no, score) go in; a temperature-calibrated probability for every option comes out of one pass, through a self-hosted /v1/systemone-compatible server. Apache-2.0 weights and code.
Decides
choice, score, noul, classify
choice, score, noul, classify, route
Architecture
biodecision
wald
Fine-tuned from
qwen/qwen3.5-4b
qwen/qwen3.5-4b-base
License
Research use only (several training sources are non-commercial); not validated for patient care
apache-2.0
Availability
Open weights
Open weights
Hosted by
—
—
Input price
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Decision accuracy
75.3%
88.3%
Calibration error
—
0.045
Valid action rate
—
—
Median latency
39 ms
33 ms
p95 latency
—
168 ms
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 biodecision and wald?
biodecision is from Dimitris Papadopoulos and wald from ORG2 AI. Both have open weights you can download and run. Both answer choice, score, noul and classify questions. Only wald answers route. biodecision is the smaller model, at 4.0B parameters to 4.2B. biodecision is licensed other; wald, apache-2.0.
Which is more accurate, biodecision or wald?
They report on different suites — biodecision 75.3% on BioDecision v2 held-out test set (63,432 overlap-screened decisions from public biomedical benchmarks; the maker's own split), wald 88.3% on JevBench public set (231 items; 204 correct), maker's run with the JevBench CLI, v1.2, effort none; items used as a development scoreboard — so the numbers do not rank them. Test both on your own labelled examples.
Which is cheaper, biodecision or wald?
biodecision: Free (open weights). wald: Free (open weights). Open weights cost nothing per call beyond your own hardware.
Which is faster, biodecision or wald?
By their publishers’ figures, wald answers in about 33 ms at the median and biodecision in about 39 ms — measured on different hardware, so treat it as a rough guide.
Can I run biodecision or wald locally?
Yes, both: systemone pull lighteternal/biodecision and systemone pull org2ai/wald download the weights.
Evaluation suite
BioDecision v2 held-out test set (63,432 overlap-screened decisions from public biomedical benchmarks; the maker's own split)
JevBench public set (231 items; 204 correct), maker's run with the JevBench CLI, v1.2, effort none; items used as a development scoreboard
Latest version
2.0.0
1.2.0
Variants
LICENSE
Dockerfile, LICENSE, NOTICE, model-files, reference, server
