Gemini 3.1 Pro vs UI-TARS 7B
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Gemini 3.1 Pro and UI-TARS 7B.
Gemini 3.1 Pro
Google's premiere multi-modal model featuring a massive 2 million token context window. Engineered for deep code analysis, video indexing, and long-context reasoning.
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...
Technical Specifications
| Specification | Gemini 3.1 Pro | UI-TARS 7B |
|---|---|---|
| Provider | ByteDance | |
| Context Window | 2,000,000 tokens | 128,000 tokens |
| Agent Suitability | 93/100 | N/A |
| Time to First Token (TTFT) | 420 ms | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2026-04-20 | 2025-07-22 |
API Pricing Comparison
Input Price per Million Tokens
Gemini 3.1 Pro
$2.00
UI-TARS 7B
$0.10
Output Price per Million Tokens
Gemini 3.1 Pro
$12.00
UI-TARS 7B
$0.20
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Gemini 3.1 Pro Quirks & Gotchas
- ▸Best model for massive context — 2M token window is class-leading
- ▸Tool calling requires explicit schema definition in Google AI Studio
UI-TARS 7B Quirks & Gotchas
No developer gotchas reported.