GPT-5.1 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 GPT-5.1 and UI-TARS 7B.
GPT-5.1
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive 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 | GPT-5.1 | UI-TARS 7B |
|---|---|---|
| Provider | OpenAI | ByteDance |
| Context Window | 400,000 tokens | 128,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-11-13 | 2025-07-22 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5.1
$1.25
UI-TARS 7B
$0.10
Output Price per Million Tokens
GPT-5.1
$10.00
UI-TARS 7B
$0.20
Want to test both models live?
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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.
GPT-5.1 Quirks & Gotchas
No developer gotchas reported.
UI-TARS 7B Quirks & Gotchas
No developer gotchas reported.