UI-TARS 7B
ByteDance UI-TARS 7B — pricing, 128k context window, API cost calculator and alternatives.
By ByteDance
Specs
- Provider
- ByteDance
- Slug
- bytedance/ui-tars-1-5-7b
- Capabilities
- vision
Pricing freshness
- Tier
- standard
- Currency
- USD
- As of
- 2026-05-08 17:08 UTC
Pricing history
Tracking UI-TARS 7B pricing since 2026-05-08. We'll plot the chart here once it changes.
Quickstart — call UI-TARS 7B from your app
curl https://openrouter.ai/api/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-d '{
"model": "bytedance/ui-tars-1-5-7b",
"messages": [{"role": "user", "content": "Hello!"}]
}'Official docs: https://openrouter.ai/docs
# pip install openai
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key=os.environ["OPENROUTER_API_KEY"],
)
resp = client.chat.completions.create(
model="bytedance/ui-tars-1-5-7b",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)Official docs: https://openrouter.ai/docs
// npm install openai
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const resp = await client.chat.completions.create({
model: "bytedance/ui-tars-1-5-7b",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(resp.choices[0].message.content);Official docs: https://openrouter.ai/docs
Related models
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Frequently asked questions
What is UI-TARS 7B ?
UI-TARS 7B is a large language model API from ByteDance with a 128k-token context window. It costs $0.1 per 1M input tokens and $0.2 per 1M output tokens.
How much does UI-TARS 7B cost?
UI-TARS 7B is priced at $0.1 per 1M input tokens and $0.2 per 1M output tokens via the ByteDance API. A 50/50 input/output workload of 1M total tokens costs about $0.15.
What is the context window of UI-TARS 7B ?
UI-TARS 7B supports up to 128k tokens of context per request — roughly 256 pages of English text or 16000 lines of code at a typical density.
Does UI-TARS 7B support vision, tool use, or JSON mode?
UI-TARS 7B supports image input (vision). It does not support tool/function calling and structured JSON mode.
Who makes UI-TARS 7B ?
UI-TARS 7B is built and operated by ByteDance. Pricing, context window, and capabilities on this page are refreshed nightly from ByteDance's public catalog.
Can I self-host UI-TARS 7B ?
UI-TARS 7B is API-only — its weights are not publicly distributed by ByteDance, so it cannot be self-hosted today.