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Inception: Mercury 2 vs StepFun: Step 3.7 Flash

Summary

Mercury 2 vs Step 3.7 Flash benchmark comparison: Step 3.7 Flash leads on average score with 7.0 vs 6.6. Mercury 2 has the lower benchmark cost at $0.058 vs $1.148. Mercury 2 is faster at 2.24s vs 64.46s, with pass rates of 54.0% vs 63.5%.

Recommended model: Mercury 2 - Its score stays close to the best score here (6.6 vs 7.0), while costing about 19.9x less than Step 3.7 Flash.

Last updated at: 2026-06-04

Metric Mercury 2 Mercury 2 medium Release: 2026-02-24 Step 3.7 Flash Step 3.7 Flash high Release: 2026-05-29
Score 6.6 7.0
Rank #81 #71
Reliability 10.0 10.0
Consistency 8.8 8.2
Tests Correct
Attempt pass rate 54.0% 63.5%
Flaky tests 3 4
Total Runs 63 63
Cost per result 0.578 10.434
Total Cost $0.058 $1.148
Input Price $0.250 / 1M $0.200 / 1M
Output Price $0.750 / 1M $1.150 / 1M
Total Input Tokens 35,116 38,391
Output Tokens 4,048 991,355
Reasoning Tokens 61,219 0
Response Time (avg) 2.24s 64.46s
Response Time (max) 14.63s 364.99s
Response Time (total) 44.72s 1353.57s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#81 Mercury 2

medium
Cost
$0.002
Time
2.1s
Tokens
1,702 tok

#71 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 6.9 9.9 50.0% 0 1.12s 554 2,546 2,609
Step 3.7 Flash 10.0 10.0 100.0% 0 13.40s 696 42,656 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 8.2 7.7 77.8% 1 2.04s 7,065 296 11,328
Step 3.7 Flash 4.0 6.0 22.2% 1 206.21s 6,057 327,340 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 10.0 10.0 100.0% 0 3.28s 12,909 268 4,887
Step 3.7 Flash 10.0 10.0 100.0% 0 13.01s 13,638 8,802 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 7.3 5.9 83.3% 1 1.11s 6,234 183 1,656
Step 3.7 Flash 10.0 10.0 100.0% 0 14.72s 7,368 23,113 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 2.9 7.2 11.1% 1 6.48s 695 41 30,754
Step 3.7 Flash 4.1 4.4 44.5% 2 149.64s 783 410,502 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 4.8 10.0 0.0% 0 821ms 456 137 542
Step 3.7 Flash 5.5 10.0 0.0% 0 4.17s 510 2,862 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 10.0 10.0 100.0% 0 1.07s 340 14 958
Step 3.7 Flash 9.8 10.0 100.0% 0 1.52s 705 2,010 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 5.4 10.0 33.3% 0 949ms 601 361 2,781
Step 3.7 Flash 5.3 7.2 44.4% 1 10.22s 711 25,422 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 10.0 10.0 100.0% 0 1.89s 6,080 180 1,956
Step 3.7 Flash 10.0 10.0 100.0% 0 2.79s 7,701 1,172 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 3.0 10.0 0.0% 0 2.58s 182 22 3,748
Step 3.7 Flash 3.0 10.0 0.0% 0 149.34s 222 147,476 0

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