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Mercury 2.5 (medium) vs Kimi K2.5 (medium)

The average score is effectively tied at 6.4 vs 6.4. Mercury 2.5 (medium) has the lower benchmark cost at $0.034 vs $0.841. Mercury 2.5 (medium) is faster at 7.74s vs 125.76s, with pass rates of 63.8% vs 60.9%.

Last updated at: 2026-10-03

Compared models

Rank
#209
Total Output Tokens
138,946
Response Time (avg)
7.74s
Total Cost
$0.034
Rank
#208
Total Output Tokens
241,096
Response Time (avg)
125.76s
Total Cost
$0.841
Recommended model Mercury 2.5 (medium)

It has the best score here (6.4), while costing about 25.1x less than Kimi K2.5 (medium).

Detailed comparison

Metric Mercury 2.5 Mercury 2.5 medium Release: 2026-09-08 Kimi K2.5 Kimi K2.5 medium Release: 2026-01-27
Score 6.4 6.4
Rank #209 #208
Reliability 9.7 9.6
Consistency 8.3 7.1
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 63.8% 60.9%
Flaky tests 5 8
Total Runs 69 69
Cost per result 0.280 6.085
Total Cost $0.034 $0.841
Input Price $0.040 / 1M $0.450 / 1M
Output Price $0.150 / 1M $2.250 / 1M
Cache Read Price $0.004 / 1M $0.070 / 1M
Cache Write Price N/A N/A
Total Input Tokens 317,982 292,271
Output Tokens 3,918 55,025
Reasoning Tokens 135,028 186,071
Response Time (avg) 7.74s 125.76s
Response Time (max) 107.89s 566.79s
Response Time (total) 178.07s 2137.84s
Parameters ~100B 1T total (32B active)
Availability Closed Weights available

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.

#209 Mercury 2.5

medium
Cost
$0.001
Time
3.8s
Tokens
3,386 tok

#208 MoonshotAI: Kimi K2.5

medium
Cost
$0.030
Time
58.6s
Tokens
8,683 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 5.0 5.1 44.5% 2 3.70s 7,807 488 21,857
Kimi K2.5 6.1 4.6 66.7% 2 217.49s 6,935 5,705 74,693

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