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Mercury 2.5 Preview (low) vs GPT-4o-mini (default)

Mercury 2.5 Preview (low) leads on average score with 5.0 vs 5.0. Mercury 2.5 Preview (low) has the lower benchmark cost at $0.015 vs $0.024. GPT-4o-mini (default) is faster at 4.16s vs 4.92s, with pass rates of 44.9% vs 21.7%.

Last updated at: 2026-10-16

Compared models

Rank
#336
Total Output Tokens
36,870
Response Time (avg)
4.92s
Total Cost
$0.015
Rank
#339
Total Output Tokens
3,627
Response Time (avg)
4.16s
Total Cost
$0.024
Recommended model Mercury 2.5 Preview (low)

It has the best score here (5.0), while costing about 1.6x less than GPT-4o-mini (default).

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview low Release: 2026-09-02 GPT-4o-mini GPT-4o-mini default Release: 2024-07-18
Score 5.0 5.0
Rank #336 #339
Reliability 9.9 10.0
Consistency 7.1 9.9
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 44.9% 21.7%
Flaky tests 8 0
Total Runs 69 69
Cost per result 0.244 0.480
Total Cost $0.015 $0.024
Input Price $0.040 / 1M $0.150 / 1M
Output Price $0.150 / 1M $0.600 / 1M
Cache Read Price N/A $0.075 / 1M
Cache Write Price N/A N/A
Total Input Tokens 235,438 145,180
Output Tokens 8,136 3,627
Reasoning Tokens 28,734 0
Response Time (avg) 4.92s 4.16s
Response Time (max) 84.47s 39.99s
Response Time (total) 113.24s 70.70s
Parameters ~100B ~8B
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.

#336 Mercury 2.5 Preview

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

#339 GPT-4o-mini

default
Cost
$0.001
Time
6.6s
Tokens
742 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
GPT-4o-mini 3.2 9.6 0.0% 0 1.63s 7,314 367 0

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