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Mercury 2.5 Preview — high vs medium

medium leads on average score with 6.8 vs 6.5. medium has the lower benchmark cost at $0.039 vs $0.040. medium is faster at 6.66s vs 7.61s, with pass rates of 65.2% vs 66.7%.

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
#199
Total Output Tokens
150,107
Response Time (avg)
6.66s
Total Cost
$0.039
Recommended model medium

It has the strongest score in this comparison (6.8) and the best overall balance of cost and response time across 2 models.

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview high Release: 2026-09-02 Mercury 2.5 Preview Mercury 2.5 Preview medium Release: 2026-09-02
Score 6.5 6.8
Rank #223 #199
Reliability 9.9 10.0
Consistency 8.0 9.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 65.2% 66.7%
Flaky tests 6 1
Total Runs 69 69
Cost per result 0.319 0.244
Total Cost $0.040 $0.039
Input Price $0.040 / 1M $0.040 / 1M
Output Price $0.150 / 1M $0.150 / 1M
Cache Read Price N/A N/A
Cache Write Price N/A N/A
Total Input Tokens 298,512 397,291
Output Tokens 3,178 6,355
Reasoning Tokens 177,419 143,752
Response Time (avg) 7.61s 6.66s
Response Time (max) 86.84s 74.63s
Response Time (total) 175.08s 153.29s
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

#199 Mercury 2.5 Preview

medium
Cost
$0.001
Time
2.7s
Tokens
2,241 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 2.5 Preview 7.8 10.0 66.7% 0 3.86s 7,839 552 22,126

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