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Mercury 2.5 Preview (high) vs Mercury 2 (medium)

Mercury 2 (medium) leads on average score with 6.6 vs 6.5. Mercury 2.5 Preview (high) has the lower benchmark cost at $0.040 vs $0.121. Mercury 2 (medium) is faster at 4.40s vs 7.61s, with pass rates of 65.2% vs 53.6%.

Last updated at: 2026-10-16

Compared models

Rank
#223
Total Output Tokens
180,597
Response Time (avg)
7.61s
Total Cost
$0.040
Rank
#218
Total Output Tokens
96,943
Response Time (avg)
4.40s
Total Cost
$0.121
Recommended model Mercury 2.5 Preview (high)

Its score stays close to the best score here (6.5 vs 6.6), while costing about 3.1x less than Mercury 2 (medium).

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview high Release: 2026-09-02 Mercury 2 Mercury 2 medium Release: 2026-02-24
Score 6.5 6.6
Rank #223 #218
Reliability 9.9 10.0
Consistency 8.0 8.1
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 65.2% 53.6%
Flaky tests 6 5
Total Runs 69 69
Cost per result 0.319 1.201
Total Cost $0.040 $0.121
Input Price $0.040 / 1M $0.250 / 1M
Output Price $0.150 / 1M $0.750 / 1M
Cache Read Price N/A $0.025 / 1M
Cache Write Price N/A N/A
Total Input Tokens 298,512 189,300
Output Tokens 3,178 10,854
Reasoning Tokens 177,419 86,089
Response Time (avg) 7.61s 4.40s
Response Time (max) 86.84s 34.92s
Response Time (total) 175.08s 96.81s
Parameters ~100B ~100B
Availability Closed Closed

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.

#223 Mercury 2.5 Preview

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

#218 Mercury 2

medium
Cost
$0.002
Time
2.1s
Tokens
1,702 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
Mercury 2 8.2 7.7 77.8% 1 2.04s 7,065 296 11,328

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