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Inception: Mercury 2 vs StepFun: Step 3.5 Flash

Last updated at: 2026-04-11

Metric Mercury 2 Mercury 2 none Release: 2026-02-24 Step 3.5 Flash Step 3.5 Flash none Release: 2026-02-01
Score 4.8 3.0
Rank #85 #93
Consistency 9.0 10.0
Tests Correct
Attempt pass rate 27.8% 0.0%
Flaky tests 2 0
Total Runs 54 3
Cost per result 0.165 0.000
Total Cost $0.007 $0.000
Input Price $0.250 / 1M $0.100 / 1M
Output Price $0.750 / 1M $0.300 / 1M
Output Tokens 1,625 0
Reasoning Tokens 0 0
Response Time (avg) 613ms 0ms
Response Time (max) 1.27s 0ms
Response Time (total) 11.04s 0ms

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 3.0 10.0 0.0% 0 483ms 286 0
Step 3.5 Flash - - - - - - - -
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 3.6 8.9 0.0% 0 969ms 310 0
Step 3.5 Flash 3.0 10.0 0.0% 0 0ms 0 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 3.0 10.0 0.0% 0 606ms 131 0
Step 3.5 Flash - - - - - - - -
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 7.3 5.9 83.3% 1 667ms 180 0
Step 3.5 Flash - - - - - - - -
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 5.3 7.2 44.4% 1 534ms 46 0
Step 3.5 Flash - - - - - - - -
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 4.8 10.0 0.0% 0 628ms 159 0
Step 3.5 Flash - - - - - - - -
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 6.5 10.0 50.0% 0 551ms 82 0
Step 3.5 Flash - - - - - - - -
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 3.1 10.0 0.0% 0 533ms 234 0
Step 3.5 Flash - - - - - - - -
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 10.0 10.0 100.0% 0 1.27s 197 0
Step 3.5 Flash - - - - - - - -

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