UI-TARS 7B
ByteDance · released Apr 16, 2025 · ByteDance-Seed/UI-TARS-1.5-7B
- Type
- Open weightsApache License 2.0
- Params
- 8.3B
- Context
- 128K
about 96K words of context
Our take
Written Aug 3, 2026UI-TARS is a small downloadable vision-language model from ByteDance that reads images and text to produce text output. Released in 2025 under an Apache licence, it is built for screen understanding and interface tasks, though no independent quality scores have been published yet.
Pick this for UI automation or screen-understanding tasks where you need image input on a tight budget, or where an Apache licence matters for commercial deployment. Use it when you want identical pricing across providers and predictable throughput on Parasail. Skip it if you need measured quality data to validate capability, or if you want the depth that larger multimodal models typically offer.
The case for it
- Apache 2.0 licence allows commercial use, fine-tuning and redistribution without restriction.
- Identical pricing across both tracked hosts removes the need to shop around for a better rate.
- Known throughput of 34 tokens per second on at least one host.
The case against it
- No benchmark scores in our data — no measured chat, coding, reasoning or UI-task accuracy at all.
- 8.3 billion parameters with no claimed efficiency mechanism; this is small for a multimodal model and may limit capability depth.
- Throughput is unverified on OpenRouter; only one host has a recorded figure.
How good is it?
We hold no score for this model.
We look for every model we track on every board we watch, and none of them has turned up UI-TARS 7B — so there is no intelligence, coding, agentic or writing score to show you, not a low one, none.
Can you run it yourself?
- Fits in memory
- weights load entirely on the card
- Spills to system RAM
- some weights offload; much slower
- Too large
- will not load even with offload
- est
- size is calculated; the verdict could change by 10%
Comfortable fit
GeForce RTX 4090 · 24 GB
Room to spare. 16.1 GB spare means a 10% error in the size would not change the answer.
GeForce RTX 5090 · 32 GB
Room to spare. 24.1 GB spare means a 10% error in the size would not change the answer.
Apple M1 (8-core GPU) · 16 GB
Room to spare. 5.3 GB spare means a 10% error in the size would not change the answer.
Memory use by level
Against a 24 GB card.
All 3 sizes here are calculated, not measured. We hold no measured file for this model, so each size comes from the parameter count and every verdict above inherits that uncertainty.
Check against your own machine → · All 71 devices, with every size →
Or rent it from someone else
Cheapest of 2 live listings. Picked at the widest standard context we hold, within one quantisation slice, so the numbers beside it are a price one host actually charges.
- per 1M tokens
- $0.10 in / $0.20 out
- Context served
- 128K
- Throughput
- Not measured
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouter | $0.10 / $0.20 | 128K | not measured | Unknown | Unknown | Unknown |
| Parasailbf16 | $0.10 / $0.20 | 128K | 17 tok/s | No | No | Confirmed |
Across the 2 listings we hold: 1 say they do not train on prompts, 0 say they do and 1 do not say. 1 appear in the zero-retention registry we check; the rest are unknown to us rather than confirmed either way.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
- ✓
- Supported
- ✗
- Not supported
- Not published
- host gave no parameter list
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenRouter | ✗ | ✗ | ✓ |
| Parasailbf16 | ✗ | ✗ | ✓ |
Tool calling: 0 of 2 listings say yes, 2 say no. JSON output: 0 of 2 listings say yes, 2 say no. Strict schema: 2 of 2 listings say yes.
When we formed this view
Dates behind this page
Prices last checked 14h ago
What we do not know about this model yet
- We hold no measured file for it, so all 3 sizes on this page are calculated from the parameter count.
- No board we watch has turned up a score, so we hold no quality figures at all.
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 2 listings do not say whether they train on prompts.
Licence and identifiers
What the licence allowsApache License 2.0, what it allows commercially, and the identifiers you need to pull this model — its Hugging Face repo, our slug and a machine-readable card.
Licence
Apache License 2.0
Fully permissive: commercial use, redistribution, and derivatives allowed. Requires attribution and a copy of the license. Includes an express patent grant.
Identifiers
- Hugging Face
- ByteDance-Seed/UI-TARS-1.5-7B
- Architecture
- Dense
- Modality record
- text+image->text
- Catalogue slug
- bytedance-ui-tars-7b