UI-TARS 7B vs Phi 4: side-by-side summary

UI-TARS 7B and Phi 4 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.

Phi 4, from Microsoft, has a 16,384-token context window and is priced at $0.07/M tokens input, $0.14/M tokens output on OpenRouter.

Context window

• UI-TARS 7B : 128,000 tokens
• Phi 4: 16,384 tokens

Price

• UI-TARS 7B : $0.10/M tokens input, $0.20/M tokens output
• Phi 4: $0.07/M tokens input, $0.14/M tokens output

Provided by

• UI-TARS 7B : bytedance
• Phi 4: Microsoft

• UI-TARS 7B model details, providers and pricing
• Phi 4 model details, providers and pricing