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Mercury 2.5 Preview (medium) vs LongCat 2.0 (low)

Mercury 2.5 Preview (medium) leads on average score with 6.8 vs 6.6. Mercury 2.5 Preview (medium) has the lower benchmark cost at $0.039 vs $0.630. Mercury 2.5 Preview (medium) is faster at 6.66s vs 115.00s, with pass rates of 66.7% vs 55.1%.

Last updated at: 2026-10-17

Compared models

Rank
#199
Total Output Tokens
150,107
Response Time (avg)
6.66s
Total Cost
$0.039
Rank
#217
Total Output Tokens
346,225
Response Time (avg)
115.00s
Total Cost
$0.630
Recommended model Mercury 2.5 Preview (medium)

It has the best score here (6.8), while costing about 16.4x less than LongCat 2.0 (low).

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview medium Release: 2026-09-02 LongCat 2.0 LongCat 2.0 low Release: 2026-07-20
Score 6.8 6.6
Rank #199 #217
Reliability 10.0 9.9
Consistency 9.6 8.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 66.7% 55.1%
Flaky tests 1 5
Total Runs 69 69
Cost per result 0.244 4.942
Total Cost $0.039 $0.630
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 397,291 262,387
Output Tokens 6,355 7,344
Reasoning Tokens 143,752 338,881
Response Time (avg) 6.66s 115.00s
Response Time (max) 74.63s 560.39s
Response Time (total) 153.29s 2645.11s
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.

#199 Mercury 2.5 Preview

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

#217 LongCat 2.0

low
Cost
$0.024
Time
428.0s
Tokens
19,557 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 6.6 4.6 77.8% 2 479.30s 6,544 461 206,627

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