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Inception: Mercury 2 vs OpenAI: GPT-5 Nano

Last updated at: 2026-05-22

Metric Mercury 2 Mercury 2 medium Release: 2026-02-24 GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07
Score 6.3 6.1
Rank #90 #94
Reliability 10.0 10.0
Consistency 8.4 7.1
Tests Correct
Attempt pass rate 50.0% 55.0%
Flaky tests 4 7
Total Runs 60 60
Cost per result 0.687 0.945
Total Cost $0.055 $0.076
Input Price $0.250 / 1M $0.050 / 1M
Output Price $0.750 / 1M $0.400 / 1M
Output Tokens 4,015 5,338
Reasoning Tokens 58,382 179,584
Response Time (avg) 2.27s 43.11s
Response Time (max) 14.63s 204.02s
Response Time (total) 43.15s 560.45s

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) Output Tokens Reasoning Tokens
Mercury 2 6.9 9.9 50.0% 0 1.12s 2,546 2,609
GPT-5 Nano 6.5 7.9 58.3% 1 25.50s 1,221 21,184
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 7.2 6.5 66.7% 1 2.29s 270 8,514
GPT-5 Nano 5.4 6.6 33.3% 1 47.80s 604 30,144
Combined 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 3.28s 268 4,887
GPT-5 Nano 10.0 10.0 100.0% 0 65.96s 578 17,984
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 1.11s 183 1,656
GPT-5 Nano 3.7 1.7 50.0% 2 21.42s 453 10,560
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 2.9 7.2 11.1% 1 6.48s 41 30,754
GPT-5 Nano 5.2 4.4 55.6% 2 204.02s 237 64,448
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 821ms 137 542
GPT-5 Nano 4.1 10.0 0.0% 0 17.51s 202 4,608
Instructions following 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 1.07s 14 958
GPT-5 Nano 9.8 10.0 100.0% 0 11.90s 382 4,096
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Mercury 2 3.8 7.3 22.2% 1 934ms 354 2,758
GPT-5 Nano 5.3 7.2 44.4% 1 19.81s 869 13,440
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 1.89s 180 1,956
GPT-5 Nano 10.0 10.0 100.0% 0 33.30s 558 6,976
Trivia 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 2.58s 22 3,748
GPT-5 Nano 3.0 10.0 0.0% 0 20.13s 234 6,144

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