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Mercury 2.5 Preview (medium) vs Laguna XS 2.1 (medium)

Mercury 2.5 Preview (medium) leads on average score with 6.8 vs 6.4. Mercury 2.5 Preview (medium) has the lower benchmark cost at $0.039 vs $0.083. Mercury 2.5 Preview (medium) is faster at 6.66s vs 48.97s, with pass rates of 66.7% vs 46.4%.

Last updated at: 2026-10-01

Compared models

Rank
#171
Total Output Tokens
150,107
Response Time (avg)
6.66s
Total Cost
$0.039
Rank
#200
Total Output Tokens
538,292
Response Time (avg)
48.97s
Total Cost
$0.083
Recommended model Mercury 2.5 Preview (medium)

It has the best score here (6.8), while costing about 2.2x less than Laguna XS 2.1 (medium).

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview medium Release: 2026-09-02 Laguna XS 2.1 Laguna XS 2.1 medium Release: 2026-07-02 Free Available
Score 6.8 6.4
Rank #171 #200
Reliability 10.0 10.0
Consistency 9.6 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 66.7% 46.4%
Flaky tests 1 3
Total Runs 69 69
Cost per result 0.244 0.922
Total Cost $0.039 $0.083
Input Price $0.040 / 1M $0.060 / 1M
Output Price $0.150 / 1M $0.120 / 1M
Cache Read Price N/A $0.030 / 1M
Cache Write Price N/A N/A
Total Input Tokens 397,291 352,516
Output Tokens 6,355 33,786
Reasoning Tokens 143,752 504,506
Response Time (avg) 6.66s 48.97s
Response Time (max) 74.63s 422.72s
Response Time (total) 153.29s 1126.35s
Parameters ~100B 33B total (3B 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.

#171 Mercury 2.5 Preview

medium
Cost
$0.001
Time
2.7s
Tokens
2,241 tok

#200 Laguna XS 2.1

medium
Cost
$0.001
Time
30.6s
Tokens
4,678 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 7.8 10.0 66.7% 0 3.86s 7,839 552 22,126
Laguna XS 2.1 5.5 10.0 33.3% 0 70.35s 7,995 23,767 83,258

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