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Inception: Mercury 2 vs xAI: Grok 4.20

Last updated at: 2026-05-10

Metric Mercury 2 Mercury 2 medium Release: 2026-02-24 Grok 4.20 Grok 4.20 none Release: 2026-03-31
Score 6.3 5.4
Rank #82 #115
Reliability 10.0 N/A
Consistency 8.7 9.5
Tests Correct
Attempt pass rate 50.9% 35.2%
Flaky tests 3 1
Total Runs 57 54
Cost per result 0.616 1.574
Total Cost $0.050 $0.095
Input Price $0.250 / 1M $1.250 / 1M
Output Price $0.750 / 1M $2.500 / 1M
Output Tokens 3,994 1,967
Reasoning Tokens 52,081 0
Response Time (avg) 2.23s 1.11s
Response Time (max) 14.63s 6.04s
Response Time (total) 40.10s 20.02s

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
Grok 4.20 4.8 10.0 25.0% 0 501ms 267 0
Coding 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 1.53s 249 2,213
Grok 4.20 3.4 9.3 0.0% 0 1.22s 312 0
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
Grok 4.20 3.0 10.0 0.0% 0 6.04s 282 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 1.11s 183 1,656
Grok 4.20 10.0 10.0 100.0% 0 522ms 207 0
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
Grok 4.20 3.0 10.0 0.0% 0 687ms 325 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 821ms 137 542
Grok 4.20 4.8 10.0 0.0% 0 659ms 83 0
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
Grok 4.20 6.3 10.0 50.0% 0 455ms 60 0
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
Grok 4.20 5.3 7.2 44.4% 1 487ms 242 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 1.89s 180 1,956
Grok 4.20 10.0 10.0 100.0% 0 4.63s 189 0
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
Grok 4.20 - - - - - - - -

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