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Mercury 2.5 Preview (medium) vs Qwen3.5-Flash

Mercury 2.5 Preview (medium) leads on average score with 6.8 vs 6.7. Mercury 2.5 Preview (medium) has the lower benchmark cost at $0.039 vs $0.089. Mercury 2.5 Preview (medium) is faster at 6.66s vs 26.52s, with pass rates of 66.7% vs 37.7%.

Last updated at: 2026-10-09

Compared models

Rank
#183
Total Output Tokens
150,107
Response Time (avg)
6.66s
Total Cost
$0.039
Rank
#189
Total Output Tokens
219,122
Response Time (avg)
26.52s
Total Cost
$0.089
Recommended model Mercury 2.5 Preview (medium)

It has the best score here (6.8), while costing about 2.3x less than Qwen3.5-Flash.

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview medium Release: 2026-09-02 Qwen3.5-Flash Qwen3.5-Flash none Release: 2026-02-24
Score 6.8 6.7
Rank #183 #189
Reliability 10.0 10.0
Consistency 9.6 9.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 66.7% 37.7%
Flaky tests 1 2
Total Runs 69 69
Cost per result 0.244 1.113
Total Cost $0.039 $0.089
Input Price $0.040 / 1M $0.065 / 1M
Output Price $0.150 / 1M $0.260 / 1M
Cache Read Price N/A N/A
Cache Write Price N/A N/A
Total Input Tokens 397,291 463,872
Output Tokens 6,355 219,122
Reasoning Tokens 143,752 0
Response Time (avg) 6.66s 26.52s
Response Time (max) 74.63s 480.96s
Response Time (total) 153.29s 609.94s
Parameters ~100B ~35B total (~3B active)
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.

#183 Mercury 2.5 Preview

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

#189 Qwen3.5-Flash

none
Cost
$0.003
Time
47.4s
Tokens
7,799 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
Qwen3.5-Flash 5.5 10.0 33.3% 0 850ms 7,913 519 0

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