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Mercury 2.5 Preview (low) vs KAT Coder AIR V2.5 (medium)

KAT Coder AIR V2.5 (medium) leads on average score with 5.1 vs 5.0. Mercury 2.5 Preview (low) has the lower benchmark cost at $0.015 vs $0.048. Mercury 2.5 Preview (low) is faster at 4.92s vs 8.32s, with pass rates of 44.9% vs 43.5%.

Last updated at: 2026-10-01

Compared models

Rank
#297
Total Output Tokens
36,870
Response Time (avg)
4.92s
Total Cost
$0.015
Rank
#294
Total Output Tokens
66,576
Response Time (avg)
8.32s
Total Cost
$0.048
Recommended model Mercury 2.5 Preview (low)

Its score stays close to the best score here (5.0 vs 5.1), while costing about 3.3x less than KAT Coder AIR V2.5 (medium).

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview low Release: 2026-09-02 KAT Coder AIR V2.5 KAT Coder AIR V2.5 medium Release: 2026-07-14
Score 5.0 5.1
Rank #297 #294
Reliability 9.9 9.6
Consistency 7.1 8.9
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 44.9% 43.5%
Flaky tests 8 3
Total Runs 69 69
Cost per result 0.244 0.596
Total Cost $0.015 $0.048
Input Price $0.000 / 1M $0.000 / 1M
Output Price $0.000 / 1M $0.000 / 1M
Total Input Tokens 235,438 51,369
Output Tokens 8,136 8,008
Reasoning Tokens 28,734 58,568
Response Time (avg) 4.92s 8.32s
Response Time (max) 84.47s 48.19s
Response Time (total) 113.24s 191.40s
Parameters ~100B ~35B total (~3B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#297 Mercury 2.5 Preview

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

#294 KAT Coder AIR V2.5

medium
Cost
$0.003
Time
23.7s
Tokens
4,924 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
KAT Coder AIR V2.5 3.6 7.0 22.2% 1 23.37s 7,893 5,199 29,973

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