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Inception: Mercury 2 vs OpenAI: GPT-5.5

Summary

Mercury 2 vs GPT-5.5 benchmark comparison: GPT-5.5 leads on average score with 9.3 vs 4.6. Mercury 2 has the lower benchmark cost at $0.011 vs $0.907. Mercury 2 is faster at 653ms vs 9.76s, with pass rates of 23.8% vs 85.7%.

Recommended model: Mercury 2 - It offers the best overall trade-off: a competitive score (4.6), lower cost than GPT-5.5, and balanced response time.

Last updated at: 2026-06-18

Metric Mercury 2 Mercury 2 none Release: 2026-02-24 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 4.6 9.3
Rank #151 #4
Reliability 10.0 10.0
Consistency 9.2 10.0
Tests Correct
Attempt pass rate 23.8% 85.7%
Flaky tests 2 0
Total Runs 63 63
Cost per result 0.259 5.035
Total Cost $0.011 $0.907
Input Price $0.250 / 1M $5.000 / 1M
Output Price $0.750 / 1M $30.000 / 1M
Total Input Tokens 28,113 34,209
Output Tokens 4,439 2,046
Reasoning Tokens 0 22,460
Response Time (avg) 653ms 9.76s
Response Time (max) 1.43s 56.19s
Response Time (total) 13.72s 204.92s

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

#4 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 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-5.5 10.0 10.0 100.0% 0 4.41s 606 238 1,020
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-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402
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-5.5 10.0 10.0 100.0% 0 9.56s 11,019 303 717
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-5.5 10.0 10.0 100.0% 0 3.28s 7,140 228 157
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-5.5 5.3 10.0 33.3% 0 28.05s 723 69 11,609
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-5.5 10.0 10.0 100.0% 0 5.17s 477 133 245
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-5.5 9.9 10.0 100.0% 0 3.74s 660 93 415
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-5.5 10.0 10.0 100.0% 0 4.74s 642 279 954
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-5.5 10.0 10.0 100.0% 0 4.96s 5,445 250 101
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-5.5 3.0 10.0 0.0% 0 10.06s 195 30 840

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