Compare/Mercury 2 vs Reka Flash 3

Mercury 2vsReka Flash 3

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

Inception

Mercury 2

Input
$0.25/M
Output
$0.75/M
Speed
907 tok/s
TTFT
3.76s
Reka AI

Reka Flash 3

Input
$0.2/M
Output
$0.8/M
Speed
56 tok/s
TTFT
1.33s

Winner by Category

Cheaper
Reka Flash 3
Faster (tok/s)
Mercury 2
Lower Latency
Reka Flash 3
Benchmarks (7-5)
Mercury 2

Pricing Comparison

MetricMercury 2Reka Flash 3
Input ($/M tokens)$0.25$0.2
Output ($/M tokens)$0.75$0.8
Cost for 1M input + 100K output tokens:
Mercury 2$0.33
Reka Flash 3$0.28

Speed Comparison

Output Speed (tokens/s) — higher is better
Mercury 2
907 tok/s
Reka Flash 3
56 tok/s
Time to First Token (seconds) — lower is better
Mercury 2
3.76s
Reka Flash 3
1.33s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
32.89.5
Coding Index
30.68.9
Math Index
33.7
GPQA Diamond
77.0%52.9%
MMLU-Pro
66.9%
LiveCodeBench
43.5%
AIME 2025
33.7%
MATH-500
89.3%
Humanity's Last Exam
15.5%5.1%
SciCode
38.7%26.7%
IFBench
69.8%30.4%
TerminalBench
26.5%0.0%
Mercury 27 wins
5 winsReka Flash 3

Frequently Asked Questions

Which is cheaper, Mercury 2 or Reka Flash 3?

Reka Flash 3 is cheaper overall. Its blended price (3:1 input/output ratio) is $0.35/M tokens vs $0.38/M for Mercury 2.

Which model performs better on benchmarks?

Mercury 2 wins 7 out of 12 benchmarks compared to 5 for Reka Flash 3. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Mercury 2 generates tokens faster at 907 tok/s vs 56 tok/s. However, Reka Flash 3 has lower time-to-first-token (1.33s vs 3.76s).

When should I use Mercury 2 vs Reka Flash 3?

Choose based on your priorities: Reka Flash 3 for lower cost, Mercury 2 for stronger benchmark performance, and Mercury 2 for faster generation. For latency-sensitive apps, check the TTFT comparison above.