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Inception: Mercury 2 vs OpenAI: GPT-5.4 Mini

Summary

Mercury 2 vs GPT-5.4 Mini benchmark comparison: GPT-5.4 Mini leads on average score with 5.3 vs 4.6. Mercury 2 has the lower benchmark cost at $0.011 vs $0.038. Mercury 2 is faster at 653ms vs 1.13s, with pass rates of 23.8% vs 30.2%.

Recommended model: Mercury 2 - Its score stays close to the best score here (4.6 vs 5.3), while costing about 3.6x less than GPT-5.4 Mini.

Last updated at: 2026-06-18

Metric Mercury 2 Mercury 2 none Release: 2026-02-24 GPT-5.4 Mini GPT-5.4 Mini none Release: 2026-03-17
Score 4.6 5.3
Rank #151 #124
Reliability 10.0 10.0
Consistency 9.2 8.8
Tests Correct
Attempt pass rate 23.8% 30.2%
Flaky tests 2 3
Total Runs 63 63
Cost per result 0.259 0.743
Total Cost $0.011 $0.038
Input Price $0.250 / 1M $0.750 / 1M
Output Price $0.750 / 1M $4.500 / 1M
Total Input Tokens 28,113 34,244
Output Tokens 4,439 2,541
Reasoning Tokens 0 0
Response Time (avg) 653ms 1.13s
Response Time (max) 1.43s 2.52s
Response Time (total) 13.72s 23.82s

Generation showcase

Hamster playing table tennis

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

#151 Mercury 2

none
Cost
$0.002
Time
1.8s
Tokens
1,514 tok

#124 GPT-5.4 Mini

none
Cost
$0.010
Time
11.7s
Tokens
2,151 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 3.0 10.0 0.0% 0 483ms 631 286 0
GPT-5.4 Mini 3.1 8.1 8.3% 1 929ms 606 654 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 3.4 9.6 0.0% 0 1.03s 7,229 3,088 0
GPT-5.4 Mini 5.5 10.0 33.3% 0 913ms 7,305 401 0
Combined 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 606ms 4,821 131 0
GPT-5.4 Mini 3.0 10.0 0.0% 0 2.52s 11,019 298 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 667ms 6,362 180 0
GPT-5.4 Mini 10.0 10.0 100.0% 0 1.30s 7,140 222 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 5.3 7.2 44.4% 1 534ms 784 46 0
GPT-5.4 Mini 3.5 4.4 33.3% 2 937ms 723 88 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 628ms 495 159 0
GPT-5.4 Mini 4.8 10.0 0.0% 0 1.82s 477 174 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 6.5 10.0 50.0% 0 551ms 691 82 0
GPT-5.4 Mini 6.3 10.0 50.0% 0 728ms 660 101 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 3.1 10.0 0.0% 0 535ms 694 251 0
GPT-5.4 Mini 5.4 10.0 33.3% 0 836ms 642 305 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 1.27s 6,193 197 0
GPT-5.4 Mini 3.0 10.0 0.0% 0 2.32s 5,477 255 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 548ms 213 19 0
GPT-5.4 Mini 3.0 10.0 0.0% 0 1.33s 195 43 0

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