Sev-4B

macmacmacmacDecision modelOpen weights

Sev-4B by macmacmacmac is a decision model: it answers typed questions with a probability for each allowed answer instead of generating text.

Pricing

No hosted price is listed. The weights are open: the cost is your own compute.

Specifications

Provider: macmacmacmac
Parameters: 4B
Released: Sep 2026
Open weights: Yes
Question types: Choice (one of N options), Score (ordered rubric), Yes / no
Mechanism: Decoder LM with a decision readout
Backbone: Qwen/Qwen3.5-4B-Base
Jev-compatible request: No
Runs on CPU: No
License: apache-2.0
Hugging Face: macmacmacmac/Sev-4B

Compare Sev-4B with…

Sev-4B vs amos-1-large—/1M in Sev-4B vs amos-1-medium—/1M in Sev-4B vs Celeris-1 Decision$0.04/1M in Sev-4B vs ScaleDown Classify-1$0.04/1M in Sev-4B vs Cloudflare clef—/1M in Sev-4B vs Cloudflare clef-flash—/1M in

FAQ

How much does Sev-4B cost?

Sev-4B has no hosted price listed; its weights are open, so the cost is the compute you run it on.

What questions can Sev-4B answer?

Sev-4B answers choice (one of n options), score (ordered rubric), yes / no questions, returning a probability for each allowed answer.

Is Sev-4B well calibrated?

No calibration measurement for Sev-4B is recorded yet.

Is Sev-4B open weight, and can it run on a CPU?

Yes, Sev-4B has open weights. It needs a GPU to run at useful speed.

Data as of 2026-10-14. Source: Metatext decision-model catalogue, 2026-10-14 (Hugging Face). Pricing is per 1M tokens (USD); confirm with the provider before production use.