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OpenAI: GPT-5.4 vs xAI: Grok 4.20

Last updated at: 2026-05-10

Metric GPT-5.4 GPT-5.4 none Release: 2026-03-05 Grok 4.20 Grok 4.20 none Release: 2026-03-31
Score 5.7 5.4
Rank #100 #115
Reliability 10.0 N/A
Consistency 9.1 9.5
Tests Correct
Attempt pass rate 40.4% 35.2%
Flaky tests 2 1
Total Runs 57 54
Cost per result 1.493 1.574
Total Cost $0.105 $0.095
Input Price $2.500 / 1M $1.250 / 1M
Output Price $15.000 / 1M $2.500 / 1M
Output Tokens 2,357 1,967
Reasoning Tokens 0 0
Response Time (avg) 1.48s 1.11s
Response Time (max) 2.95s 6.04s
Response Time (total) 28.20s 20.02s

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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
GPT-5.4 3.2 8.0 8.3% 1 1.21s 406 0
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
GPT-5.4 10.0 10.0 100.0% 0 2.95s 480 0
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
GPT-5.4 3.0 10.0 0.0% 0 2.89s 291 0
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
GPT-5.4 10.0 10.0 100.0% 0 1.04s 222 0
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
GPT-5.4 5.3 7.2 44.4% 1 1.07s 50 0
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
GPT-5.4 4.4 9.9 0.0% 0 1.78s 184 0
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
GPT-5.4 6.5 10.0 50.0% 0 1.07s 81 0
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
GPT-5.4 5.6 9.8 33.3% 0 1.52s 357 0
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
GPT-5.4 10.0 10.0 100.0% 0 2.75s 246 0
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
GPT-5.4 3.0 10.0 0.0% 0 990ms 40 0
Grok 4.20 - - - - - - - -

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