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OpenAI: GPT-5.4 Mini vs xAI: Grok 4.20 Beta

Last updated at: 2026-03-21

Metric GPT-5.4 Mini GPT-5.4 Mini medium Release: 2026-03-17 Grok 4.20 Beta Grok 4.20 Beta medium Release: 2026-03-12
Score 7.1 7.9
Rank #36 #23
Consistency 7.2 9.0
Tests Correct
Attempt pass rate 68.6% 72.6%
Flaky tests 6 2
Total Runs 51 51
Cost per result 3.610 5.525
Total Cost $0.289 $0.608
Input Price $0.750 / 1M $2.000 / 1M
Output Price $4.500 / 1M $6.000 / 1M
Output Tokens 1,708 1,487
Reasoning Tokens 58,019 87,922
Response Time (avg) 15.66s 8.54s
Response Time (max) 102.91s 24.21s
Response Time (total) 266.14s 145.26s

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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 Beta 8.7 7.9 91.7% 1 3.16s 268 7,583
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 Beta 10.0 10.0 100.0% 0 20.93s 227 12,212
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 Beta 10.0 10.0 100.0% 0 4.01s 180 5,281
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 Beta 5.3 10.0 33.3% 0 21.33s 251 40,255
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 Beta 10.0 10.0 100.0% 0 5.78s 72 3,440
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 Beta 8.3 10.0 50.0% 0 4.97s 57 7,107
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 Beta 8.2 7.2 88.9% 1 3.85s 249 6,660
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 Beta 3.0 10.0 0.0% 0 12.39s 183 5,384

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