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Specs

Model IDbytedance/ui-tars-1.5-7b
Context window128K tokens
Max output2K tokens
Input price$0.10 / 1M tokens
Output price$0.20 / 1M tokens
Inputs → outputsImage, Text → Text
Open weightsYes

How to use UI-TARS 7B in your app

The quickest way is through an API gateway such as OpenRouter, which uses the same format as the OpenAI API. Create a key, then send a request with the model ID bytedance/ui-tars-1.5-7b:

curl https://openrouter.ai/api/v1/chat/completions \ -H "Authorization: Bearer $OPENROUTER_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "bytedance/ui-tars-1.5-7b", "messages": [{"role": "user", "content": "Explain this in simple words..."}] }'

Prefer no code? Many tools in our AI tools directory run on models like this one.

Questions about UI-TARS 7B

What is UI-TARS 7B?

UI-TARS-1.5 is a multimodal vision-language agent optimized for GUI-based environments, including desktop interfaces, web browsers, mobile systems, and games. Built by ByteDance, it builds upon the UI-TARS framework with reinforcement...

How big is the context window of UI-TARS 7B?

UI-TARS 7B can read up to 128,000 tokens in one request, roughly 96,000 words.

How much does UI-TARS 7B cost?

Through OpenRouter, UI-TARS 7B costs about $0.10 / 1M tokens for input and $0.20 / 1M tokens for output. Prices change, so check before large jobs.

Is UI-TARS 7B open source?

UI-TARS 7B has open weights, so you can download and run it yourself, subject to its licence.

What can UI-TARS 7B take as input?

UI-TARS 7B accepts image, text and produces text.

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Specs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 22 Jul 2025.

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