Model Comparison
Reka Flash (Sep '24)
vs. Sonar Reasoning Pro
Comparing 2 AI models · 2 benchmarks · Reka AI, Perplexity
Recommended Pick
Pe Sonar Reasoning Pro 7 metric wins Strongest on: Input price, Output price, TTFT
Lowest Price
Sonar Reasoning Pro
$0.00/1M input price
Best Reasoning
Sonar Reasoning Pro
66.4 reasoning score
Blends available reasoning benchmarks
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Sonar Reasoning Pro is ∞x cheaper on input tokens than Reka Flash (Sep '24).
Reasoning gap
Sonar Reasoning Pro leads Reka Flash (Sep '24) by 34.0 points on reasoning.
Top-pick rationale
Sonar Reasoning Pro wins 7 measurable categories, including Input price, Output price, TTFT, Latency.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Reka Flash (Sep '24)
Reka AI
TTFT
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Time
—
tok/s
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Tokens
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Cost
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Sonar Reasoning Pro
Perplexity
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | Re Reka Flash (Sep '24) | Top Pick Pe Sonar Reasoning Pro |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.20/1M | $0.00/1M |
| Output Cost | $0.80/1M | $0.00/1M |
| Blended (3:1) | $0.35/1M | — |
| Specifications | ||
| Organization | Reka AI | Perplexity |
| Release Date | Oct 4, 2024 | Jan 28, 2025 |
| Performance & Speed | ||
| Throughput | 85.9 tok/s | — |
| TTFT | 1779ms | — |
| Latency | 1779ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 32.4 | 66.4 |
| Intelligence | 12.0 | 24.6 |
| Standard Benchmarks | ||
| MATH 500 | 52.9% | 95.7% |
| AIME (Original) | — | 79.0% |
Key Takeaways
Sonar Reasoning Pro offers the best value at $0.00/1M, making it ideal for high-volume applications and cost-conscious projects.
Sonar Reasoning Pro has the strongest reasoning profile with a 66.4 reasoning score, combining the available reasoning-heavy benchmarks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Reka Flash (Sep '24)
- General-purpose AI
- Versatile applications
Sonar Reasoning Pro
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
