R1 0528 vs Step 3.7 Flash
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 R1 0528 and Step 3.7 Flash.
R1 0528
May 28th update to the [original DeepSeek R1](/deepseek/deepseek-r1) Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active...
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...
Technical Specifications
| Specification | R1 0528 | Step 3.7 Flash |
|---|---|---|
| Provider | DeepSeek | StepFun |
| Context Window | 163,840 tokens | 256,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | self hostable | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-05-28 | 2026-05-28 |
API Pricing Comparison
Input Price per Million Tokens
R1 0528
$0.50
Step 3.7 Flash
$0.20
Output Price per Million Tokens
R1 0528
$2.15
Step 3.7 Flash
$1.15
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.
R1 0528 Quirks & Gotchas
No developer gotchas reported.
Step 3.7 Flash Quirks & Gotchas
No developer gotchas reported.