AutoTrust's student of TypeSafe Jev 1.13. A frozen Qwen3.8-27B plus a 108.9M-parameter decision block trained on Jev's own output distributions; one set of weights answers typed questions in one pass (System 1) or generates text with the untouched base (System 2).
Upstage's structured decision model, a System One endpoint on Solar Mini 4. Returns a choice, a score or a yes/no answer with a probability read from the model, in one forward pass, on the same /v1/systemone schema as Jev.
Decides
choice, score, noul
choice, score, noul, classify, route
Architecture
blocks-of-experts
solar
Fine-tuned from
qwen/qwen3.8-27b
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License
apache-2.0
proprietary
Availability
Open weights
Hosted API
Hosted by
—
Upstage
Input price
—
$0.10/MTok
Decision accuracy
88.7%
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Calibration error
—
—
Valid action rate
—
—
Median latency
137 ms
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p95 latency
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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 jev-27b and solar-decide?
jev-27b is from AutoTrust AI Lab and solar-decide from Upstage. jev-27b has open weights you can download and run; solar-decide is only available as a hosted API. Both answer choice, score and noul questions. Only solar-decide answers classify and route. jev-27b is licensed apache-2.0; solar-decide, proprietary.
Which is more accurate, jev-27b or solar-decide?
Only jev-27b publishes an accuracy figure (88.7% on JevBench public set (231 items), family-macro score, maker's run); solar-decide does not, so there is no comparison to make without your own test.
Which is cheaper, jev-27b or solar-decide?
jev-27b: Free (open weights). solar-decide: $0.1 / $0 per 1M. Open weights cost nothing per call beyond your own hardware.
Can I run jev-27b or solar-decide locally?
jev-27b yes — systemone pull autotrust-ai/jev-27b downloads its weights. The other is only served as a hosted API.
Evaluation suite
JevBench public set (231 items), family-macro score, maker's run
