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OpenAI: GPT-5.4 Mini vs xAI: Grok 4.20

Last updated at: 2026-04-02

Metric GPT-5.4 Mini GPT-5.4 Mini medium Release: 2026-03-17 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.1 7.1
Rank #41 #40
Consistency 7.2 8.2
Tests Correct
Attempt pass rate 68.6% 66.7%
Flaky tests 6 4
Total Runs 51 51
Cost per result 3.610 7.358
Total Cost $0.289 $0.663
Input Price $0.750 / 1M $2.000 / 1M
Output Price $4.500 / 1M $6.000 / 1M
Output Tokens 1,708 1,494
Reasoning Tokens 58,019 97,078
Response Time (avg) 15.66s 9.50s
Response Time (max) 102.91s 29.87s
Response Time (total) 266.14s 161.54s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 Mini 8.6 7.9 91.7% 1 4.05s 296 2,876
Grok 4.20 8.2 7.9 83.3% 1 3.36s 280 8,476
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 Mini 10.0 10.0 100.0% 0 17.81s 317 4,317
Grok 4.20 10.0 10.0 100.0% 0 17.40s 232 9,556
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 Mini 10.0 10.0 100.0% 0 2.43s 234 650
Grok 4.20 10.0 10.0 100.0% 0 4.17s 180 5,333
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 Mini 4.1 4.4 44.5% 2 65.31s 60 43,286
Grok 4.20 5.3 10.0 33.3% 0 27.03s 375 49,339
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 Mini 4.5 10.0 0.0% 0 3.72s 150 510
Grok 4.20 5.8 2.8 66.7% 1 7.09s 47 4,252
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 Mini 7.4 6.5 66.7% 1 2.50s 129 1,337
Grok 4.20 7.3 5.9 83.3% 1 4.42s 40 5,474
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 Mini 6.8 7.9 55.6% 1 4.33s 271 2,449
Grok 4.20 6.4 7.7 55.6% 1 3.89s 143 8,028
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.4 Mini 4.7 1.6 66.7% 1 9.62s 251 2,594
Grok 4.20 3.0 10.0 0.0% 0 13.68s 197 6,620

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