Navigate
Advertise here

Mercury 2.5 Preview (medium) vs LongCat 2.0

Mercury 2.5 Preview (medium) leads on average score with 6.8 vs 6.4. Mercury 2.5 Preview (medium) has the lower benchmark cost at $0.039 vs $0.104. Mercury 2.5 Preview (medium) is faster at 6.66s vs 8.50s, with pass rates of 66.7% vs 42.0%.

Last updated at: 2026-10-19

Compared models

Rank
#204
Total Output Tokens
150,107
Response Time (avg)
6.66s
Total Cost
$0.039
Rank
#251
Total Output Tokens
17,473
Response Time (avg)
8.50s
Total Cost
$0.104
Recommended model Mercury 2.5 Preview (medium)

It has the best score here (6.8), while costing about 2.7x less than LongCat 2.0.

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview medium Release: 2026-09-02 LongCat 2.0 LongCat 2.0 none Release: 2026-07-20
Score 6.8 6.4
Rank #204 #251
Reliability 10.0 10.0
Consistency 9.6 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 66.7% 42.0%
Flaky tests 1 3
Total Runs 69 69
Cost per result 0.244 1.298
Total Cost $0.039 $0.104
Input Price $0.040 / 1M $0.300 / 1M
Output Price $0.150 / 1M $1.200 / 1M
Cache Read Price N/A $0.006 / 1M
Cache Write Price N/A N/A
Total Input Tokens 397,291 276,199
Output Tokens 6,355 17,473
Reasoning Tokens 143,752 0
Response Time (avg) 6.66s 8.50s
Response Time (max) 74.63s 81.77s
Response Time (total) 153.29s 195.60s
Parameters ~100B 1.6T total (48B 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.

#204 Mercury 2.5 Preview

medium
Cost
$0.001
Time
2.7s
Tokens
2,241 tok

#251 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 7.8 10.0 66.7% 0 3.86s 7,839 552 22,126
LongCat 2.0 5.5 10.0 33.3% 0 2.85s 7,446 578 0

Switch Comparison Pair