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Mercury 2.5 Preview (low) vs Hy4 preview

Mercury 2.5 Preview (low) leads on average score with 5.0 vs 4.9. Mercury 2.5 Preview (low) has the lower benchmark cost at $0.015 vs $0.165. Mercury 2.5 Preview (low) is faster at 4.92s vs 40.38s, with pass rates of 44.9% vs 15.9%.

Last updated at: 2026-10-19

Compared models

Rank
#350
Total Output Tokens
36,870
Response Time (avg)
4.92s
Total Cost
$0.015
Rank
#363
Total Output Tokens
9,430
Response Time (avg)
40.38s
Total Cost
$0.165
Recommended model Mercury 2.5 Preview (low)

It has the best score here (5.0), while costing about 11.0x less than Hy4 preview.

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview low Release: 2026-09-02 Hy4 preview Hy4 preview none Release: 2026-08-29
Score 5.0 4.9
Rank #350 #363
Reliability 9.9 6.2
Consistency 7.1 9.4
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 44.9% 15.9%
Flaky tests 8 1
Total Runs 69 69
Cost per result 0.244 5.475
Total Cost $0.015 $0.165
Input Price $0.040 / 1M $0.751 / 1M
Output Price $0.150 / 1M $2.251 / 1M
Cache Read Price N/A $0.038 / 1M
Cache Write Price N/A N/A
Total Input Tokens 235,438 185,167
Output Tokens 8,136 9,430
Reasoning Tokens 28,734 0
Response Time (avg) 4.92s 40.38s
Response Time (max) 84.47s 95.32s
Response Time (total) 113.24s 928.76s
Parameters ~100B 770B total (49B active)
Availability Closed Open source

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#350 Mercury 2.5 Preview

low
Cost
$0.001
Time
1.5s
Tokens
1,169 tok

#363 Hy4 preview

none
This operation was aborted
Cost
$0.000
Time
0.0s
Tokens
0 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2.5 Preview 5.5 10.0 33.3% 0 972ms 7,794 695 2,263
Hy4 preview 3.8 9.4 0.0% 0 45.53s 6,646 4,103 0

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