Together AI Open-Sources Tev1-4B, a Jev-Style Classifier You Can Fine-Tune for $17

Together AI's team (including Nutlope) released together/Tev1-4B-experimental, a Jev-style lightweight classifier fine-tuned from Qwen3.5 4B using 8 public Hugging Face datasets totaling 38,000 samples, at a training cost of roughly $17 in about 25 minutes. Weights, data recipe, code repo and a full tutorial are all open-sourced, and a 0.8B variant runs locally on a Mac with about 50ms latency. The model is live on Together serverless at $0.042/M input tokens with free output. The team stresses it is experimental, meant to show how easy training a dedicated decision model can be.

Confirmed

tev1-4B-experimental is fine-tuned from Qwen3.5 4B; Jev-style classifiers take a state plus predefined questions and return fast scores.
Trained on 8 public HF datasets (38K samples); cost $17, 25 minutes.
Together's official account confirmed full weights on Hugging Face, plus data recipe, code repo and tutorial.
A 0.8B variant runs locally on Mac with 50ms latency (per iamrobotbear).
Live on Together serverless: $0.042/M input, output free.
Officially described as experimental.

Why it matters

Tev1 demonstrates that a dedicated classifier/decision model can be fine-tuned on an extremely low budget.
Full open-sourcing lowers the barrier for developers to replicate; the 0.8B variant validates low-latency local deployment on consumer hardware. Blogger vista8 notes the tutorial doubles as platform promotion.

2026-09-24 ~ 2026-09-25 · 10 related posts

Primary sources

Train your own Jev-like classifier for $17 with Qwen3.5 4B fine-tuning — nutlope · 2026-09-24 06:02 (UTC+08:00)
Together releases Tev1-4B-experimental weights to show how easy it is to train decision models — togethercompute · 2026-09-24 06:06 (UTC+08:00)
Together AI tutorial: train a Jev-like model in 25 min for ~$17 — vista8 · 2026-09-25 01:49 (UTC+08:00)

[source] Train your own Jev-like classifier for $17 with Qwen3.5 4B fine-tuning — nutlope · 2026-09-24
[source] Together releases Tev1-4B-experimental weights to show how easy it is to train decision models — togethercompute · 2026-09-24
Fine-tuning a Jev-like classifier on Qwen3.5 4B for just $17, fully open-sourced — anselm · 2026-09-24
Together launches Jev-style Tev1-4B classifier on Qwen3.5, train your own for $17 — usamawahabkhan · 2026-09-24
[source] Together AI tutorial: train a Jev-like model in 25 min for ~$17 — vista8 · 2026-09-25
Tev1: a $17-finetuned tiny classifier running locally at ~50ms latency — iamrobotbear · 2026-09-25

4 near-duplicate retellings: zainhas · nutlope · RexDouglass · vista8