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Mercury 2.5 Preview (high) vs LongCat 2.0

Mercury 2.5 Preview (high) leads on average score with 6.6 vs 6.4. Mercury 2.5 Preview (high) has the lower benchmark cost at $0.030 vs $0.044. Mercury 2.5 Preview (high) is faster at 4.01s vs 5.17s, with pass rates of 65.2% vs 40.9%.

Last updated at: 2026-09-03

Rank
#163
Total Output Tokens
163,505
Response Time (avg)
4.01s
Total Cost
$0.030
Rank
#172
Total Output Tokens
9,375
Response Time (avg)
5.17s
Total Cost
$0.044
Recommended model Mercury 2.5 Preview (high)

It has the best score here (6.6), while costing about 1.5x less than LongCat 2.0.

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview high Release: 2026-09-02 LongCat 2.0 LongCat 2.0 none Release: 2026-07-20
Score 6.6 6.4
Rank #163 #172
Reliability 10.0 10.0
Consistency 8.2 9.3
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 65.2% 40.9%
Flaky tests 5 2
Total Runs 66 66
Cost per result 0.243 0.549
Total Cost $0.030 $0.044
Input Price $0.040 / 1M $0.300 / 1M
Output Price $0.150 / 1M $1.200 / 1M
Total Input Tokens 115,759 108,752
Output Tokens 2,562 9,375
Reasoning Tokens 160,943 0
Response Time (avg) 4.01s 5.17s
Response Time (max) 17.71s 48.38s
Response Time (total) 88.25s 113.83s
Parameters ~100B 1.6T total (48B active)
Availability Closed Open source

Model generation showcase

Hamster playing table tennis

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

#163 Mercury 2.5 Preview

high
Cost
$0.001
Time
4.5s
Tokens
3,851 tok

#172 LongCat 2.0

none
Cost
$0.027
Time
411.7s
Tokens
22,283 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 6.7 7.8 55.6% 1 6.13s 7,751 485 42,569
LongCat 2.0 5.5 10.0 33.3% 0 2.85s 7,446 578 0

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