Model Comparison
Sonar
vs. Step 5 Preview
Sonar has not been available at LLMBase since 26 October 2026. See all open-weight models →
Comparing 2 AI models · 0 benchmarks · Perplexity, StepFun
Lowest Price
Step 5 Preview
$1.00/1M input price
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Sonar
Perplexity
TTFT
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Time
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tok/s
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Tokens
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Cost
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Step 5 Preview
StepFun
TTFT
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Time
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tok/s
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Tokens
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Cost
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Which answer was more useful?
EU-hosted open models, one API
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Full Comparison
| Metric | Pe Sonar | St Step 5 Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | — | $1.00/1M |
| Output Cost | — | $2.70/1M |
| Blended (3:1) | — | $1.43/1M |
| Specifications | ||
| Organization | Perplexity | StepFun |
| Release Date | Jan 21, 2025 | Sep 18, 2026 |
| Performance & Speed | ||
| Throughput | — | 161.2 tok/s |
| TTFT | — | 880ms |
| Latency | — | 13280ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | — | 28.5 |
| Intelligence | — | 28.5 |
Key Takeaways
Step 5 Preview offers the best value at $1.00/1M,making it ideal for high-volume applications and cost-conscious projects.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Sonar
- General-purpose AI
- Versatile applications
Step 5 Preview
- Cost-sensitive applications
- High-volume processing
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