Together AI Tev1 4B
Together AI's experimental decision model, fine-tuned from Qwen3.5 4B for routing, triage and policy checks, with open weights.
Together AI's Tev1 4B is a cloud decision model. It reads a piece of text and answers typed questions about it, such as a choice between labels, a yes or no, or a score on a scale, with a probability for every option instead of written text. It reads up to 33K input tokens per request. It runs through OpenRouter using your own API key, from $0.042 per million input tokens. It also runs on your own hardware through Ollama, with no API key and no per-use fees.
- Released
- Sep 2026
- Pricing
- $0.042 / 1M in · $0.00 / 1M out
- Answers
- Choice, yes/no, score
- Context window
- 33K in
Examples
Answered by Tev1 4B via OpenRouter. A decision model returns probabilities, not prose, so each card shows how sure it was about every option. The same four questions run against every Classify model in the catalog.
Hi, I was charged twice for my March subscription. Can you refund the duplicate payment before the end of the week?
Which team should handle this support ticket?
- Payments, invoices and refunds100%
- Errors or broken features in the product0%
- Login, passwords and account settings0%
- Plans, pricing questions and upgrades0%
海辺のカフェの写実的な写真、夕暮れ、35mmフィルム風
What kind of image does this prompt ask for? It can be in any language.
- A logo or brand mark0%
- A photorealistic shot96%
- Drawn, painted or stylised art2%
- Anything else2%
What is a vector database, and when would a small team need one? I'm not asking you to build anything yet.
Does this message ask the assistant to create or generate something?
- Yes: it asks for something to be made1%
- No: it asks a question or wants an explanation99%
Checkout has returned an error for every customer since 9am and we are losing orders. Please look now.
How urgent is this message?
- Can wait for the next release0%
- Should be handled this week0%
- Should be handled today4%
- Needs attention right now96%
Together AI
Together AI runs a cloud for open-source models and releases its own open-weight models, including the Tev1 decision models fine-tuned from Qwen3.5.
www.together.ai ↗