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Inception: Mercury 2 vs OpenAI: GPT-5.4 Nano

Last updated at: 2026-04-29

Metric Mercury 2 Mercury 2 none Release: 2026-02-24 GPT-5.4 Nano GPT-5.4 Nano none Release: 2026-03-17
Score 4.8 4.5
Rank #121 #128
Reliability N/A N/A
Consistency 9.0 7.1
Tests Correct
Attempt pass rate 27.8% 31.5%
Flaky tests 2 7
Total Runs 54 54
Cost per result 0.165 0.448
Total Cost $0.007 $0.009
Input Price $0.250 / 1M $0.200 / 1M
Output Price $0.750 / 1M $1.250 / 1M
Output Tokens 1,625 2,762
Reasoning Tokens 0 0
Response Time (avg) 613ms 1.40s
Response Time (max) 1.27s 3.84s
Response Time (total) 11.04s 25.14s

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Score vs Total Cost

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Score vs Response Time (avg)

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Score vs Total Output Tokens

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
GPT-5.4 Nano 3.5 8.0 16.7% 1 1.18s 800 0
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
GPT-5.4 Nano 7.1 3.7 66.7% 1 1.43s 577 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
GPT-5.4 Nano 3.0 10.0 0.0% 0 3.84s 280 0
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
GPT-5.4 Nano 6.5 10.0 50.0% 0 1.11s 219 0
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
GPT-5.4 Nano 2.9 4.4 22.2% 2 926ms 52 0
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
GPT-5.4 Nano 3.8 2.5 33.3% 1 1.31s 180 0
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
GPT-5.4 Nano 5.0 6.8 33.3% 1 787ms 84 0
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
GPT-5.4 Nano 3.7 7.3 22.2% 1 1.29s 348 0
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
GPT-5.4 Nano 10.0 10.0 100.0% 0 3.40s 222 0

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