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Mercury 2.5 Preview (high) vs Step 3.7 Flash (high)

Step 3.7 Flash (high) leads on average score with 6.6 vs 6.5. Mercury 2.5 Preview (high) has the lower benchmark cost at $0.040 vs $1.478. Mercury 2.5 Preview (high) is faster at 7.61s vs 72.72s, with pass rates of 65.2% vs 58.0%.

Last updated at: 2026-10-12

Compared models

Rank
#207
Total Output Tokens
180,597
Response Time (avg)
7.61s
Total Cost
$0.040
Rank
#203
Total Output Tokens
1,100,052
Response Time (avg)
72.72s
Total Cost
$1.478
Recommended model Mercury 2.5 Preview (high)

Its score stays close to the best score here (6.5 vs 6.6), while costing about 37.9x less than Step 3.7 Flash (high).

Detailed comparison

Metric Mercury 2.5 Preview Mercury 2.5 Preview high Release: 2026-09-02 Step 3.7 Flash Step 3.7 Flash high Release: 2026-05-29
Score 6.5 6.6
Rank #207 #203
Reliability 9.9 10.0
Consistency 8.0 8.5
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 65.2% 58.0%
Flaky tests 6 4
Total Runs 69 69
Cost per result 0.319 12.267
Total Cost $0.040 $1.478
Input Price $0.040 / 1M $0.200 / 1M
Output Price $0.150 / 1M $1.150 / 1M
Cache Read Price N/A $0.040 / 1M
Cache Write Price N/A N/A
Total Input Tokens 298,512 421,200
Output Tokens 3,178 1,100,052
Reasoning Tokens 177,419 0
Response Time (avg) 7.61s 72.72s
Response Time (max) 86.84s 364.99s
Response Time (total) 175.08s 1672.53s
Parameters ~100B 198B total (11B active)
Availability Closed Open source

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.

#207 Mercury 2.5 Preview

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

#203 Step 3.7 Flash

high
Cost
$0.007
Time
63.6s
Tokens
6,030 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
Step 3.7 Flash 4.0 6.0 22.2% 1 206.21s 6,057 327,340 0

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