Model Comparison
Reka Flash (Sep '24)
vs. Sonar Reasoning
Comparing 2 AI models · 3 benchmarks · Reka AI, Perplexity
Recommended Pick
Pe Sonar Reasoning 7 metric wins Strongest on: Input price, Output price, TTFT
Lowest Price
Sonar Reasoning
$0.00/1M input price
Best Reasoning
Sonar Reasoning
62.3 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 is ∞x cheaper on input tokens than Reka Flash (Sep '24).
Reasoning gap
Sonar Reasoning leads Reka Flash (Sep '24) by 29.9 points on reasoning.
Top-pick rationale
Sonar Reasoning 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
—
Time
—
tok/s
—
Tokens
—
Cost
—
Sonar Reasoning
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 |
|---|---|---|
| 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 | 62.3 |
| Intelligence | 12.0 | 17.9 |
| Standard Benchmarks | ||
| GPQA | — | 62.3% |
| MATH 500 | 52.9% | 92.1% |
| AIME (Original) | — | 77.0% |
Key Takeaways
Sonar Reasoning offers the best value at $0.00/1M, making it ideal for high-volume applications and cost-conscious projects.
Sonar Reasoning has the strongest reasoning profile with a 62.3 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
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
