What is the context window of UI-TARS 1.5 7B?

UI-TARS 1.5 7B has a context window of 128K tokens.

When was UI-TARS 1.5 7B released?

UI-TARS 1.5 7B was released on 2026-02-01.

UI-TARS 1.5 7B

Name: UI-TARS 1.5 7B
Author: ByteDance

ui-tars-1.5-7b

Open SourceMultimodal

About

UI-TARS-1.5 is ByteDance's multimodal vision-language agent model optimized for GUI-based environments including desktop interfaces, web browsers, and mobile apps. It supports grounding, planning, and action execution for computer-use tasks.

UI-TARS 1.5 7B has a 128K-token context window.

Capabilities

VisionMultimodalReasoningFunction CallingTool UseStructured OutputsCode Execution

Rankings

Best AI Agents & Agentic Models Best Open Source LLMs Best Multimodal / Vision LLMs Best Small Language Models (SLMs)Best LLMs for Function Calling & Tool Use Cheapest LLM APIs Best LLM APIs Best Free LLMs Best LLMs for Writing Best LLMs for Marketing

Specifications

FamilyUI-TARS

Released2026-02-01

Parameters7B

Context128K

ArchitectureDecoder Only

Specializationagents

LicenseApache 2.0

Trainingfinetuned

Created by

ByteDance

TikTok data enhances AI realism

Beijing, China

Founded 2012

Website

Links

Website HuggingFace