UI-TARS 7B vs Grok 4.5: side-by-side summary

UI-TARS 7B and Grok 4.5 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

UI-TARS 7B , from bytedance, has a 128,000-token context window and is priced at $0.10/M tokens input, $0.20/M tokens output on OpenRouter.

Grok 4.5, from SpaceXAI, has a 500,000-token context window and is priced at $2/M tokens input, $6/M tokens output on OpenRouter.

Context window

• UI-TARS 7B : 128,000 tokens
• Grok 4.5: 500,000 tokens

Price

• UI-TARS 7B : $0.10/M tokens input, $0.20/M tokens output
• Grok 4.5: $2/M tokens input, $6/M tokens output

Provided by

• UI-TARS 7B : bytedance
• Grok 4.5: SpaceXAI

• UI-TARS 7B model details, providers and pricing
• Grok 4.5 model details, providers and pricing