Julia 1
Julia 1 by Supersonic Labs is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text. It scores 2.6 on the Jev Decision Index (rank 155).
Pricing
No hosted price is listed. The weights are open: the cost is your own compute.
Specifications
- Provider
- Supersonic Labs
- Parameters
- 141M
- Released
- Sep 2026
- Open weights
- Yes
- Question types
- Choice (one of N options), Score (ordered rubric), Yes / no
- Mechanism
- Encoder classifier
- Backbone
- jhu-clsp/mmBERT-small
- Jev-compatible request
- Yes
- Runs on CPU
- Yes
- License
- apache-2.0
- Hugging Face
- SupersonicLabs/Julia-1
Benchmarks
- Jev Decision IndexECE 0.420
- 2.6
Jev Decision Index: public 4.2, ECE 0.420, Brier 0.987. Lower ECE means its probabilities can be taken at face value.
Speed & latency
Compare Julia 1 with…
FAQ
How much does Julia 1 cost?
Julia 1 has no hosted price listed; its weights are open, so the cost is the compute you run it on.
What questions can Julia 1 answer?
Julia 1 answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.
Is Julia 1 well calibrated?
On the Jev Decision Index its expected calibration error (ECE) is 0.420; below about 0.05, a stated 80% confidence is right roughly 80% of the time.
Is Julia 1 open weight, and can it run on a CPU?
Yes, Julia 1 has open weights. It is small enough to run on a CPU.
Data as of 2026-10-14. Source: Metatext decision-model catalogue, 2026-10-14 (Jev Decision Index, Benchmark Heaven JevBench, Enterprise Decision Arena, Hugging Face). Pricing is per 1M tokens (USD); confirm with the provider before production use.