Step 3.7 Flash 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 Step 3.7 Flash and UI-TARS 7B.
Step 3.7 Flash
Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...
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 | Step 3.7 Flash | UI-TARS 7B |
|---|---|---|
| Provider | StepFun | ByteDance |
| Context Window | 256,000 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 | 2026-05-28 | 2025-07-22 |
API Pricing Comparison
Input Price per Million Tokens
Step 3.7 Flash
$0.20
UI-TARS 7B
$0.10
Output Price per Million Tokens
Step 3.7 Flash
$1.15
UI-TARS 7B
$0.20
Want to test both models live?
Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Step 3.7 Flash Quirks & Gotchas
No developer gotchas reported.
UI-TARS 7B Quirks & Gotchas
No developer gotchas reported.