Key Takeaways
Rnj 1 Instruct wins:
- Cheaper output tokens
Step 3.5 Flash wins:
- Cheaper input tokens
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Has reasoning mode
Price Advantage
Rnj 1 Instruct
Benchmark Advantage
Step 3.5 Flash
Context Window
Step 3.5 Flash
Speed
Step 3.5 Flash
Pricing Comparison
Benchmark Comparison
Context & Performance
Capabilities
Feature Comparison
| Feature | Rnj 1 Instruct | Step 3.5 Flash |
|---|---|---|
Vision (Image Input) | ||
Tool/Function Calls | ||
Reasoning Mode | ||
Audio Input | ||
Audio Output | ||
PDF Input | ||
Prompt Caching | ||
Web Search |
License & Release
| Property | Rnj 1 Instruct | Step 3.5 Flash |
|---|---|---|
| License | Open Source | Open Source |
| Author | Essential AI | Stepfun-ai |
| Released | Dec 2025 | Jan 2026 |
Rnj 1 Instruct Modalities
Input
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Output
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Step 3.5 Flash Modalities
Input
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Output
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