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OpenAI: GPT-5.2 Chat vs xAI: Grok 4.20

Last updated at: 2026-04-02

Metric GPT-5.2 Chat GPT-5.2 Chat none Release: 2025-12-11 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.8 7.1
Rank #29 #40
Consistency 8.6 8.2
Tests Correct
Attempt pass rate 74.5% 66.7%
Flaky tests 3 4
Total Runs 51 51
Cost per result 2.462 7.358
Total Cost $0.271 $0.663
Input Price $1.750 / 1M $2.000 / 1M
Output Price $14.000 / 1M $6.000 / 1M
Output Tokens 16,001 1,494
Reasoning Tokens 0 97,078
Response Time (avg) 6.72s 9.50s
Response Time (max) 38.52s 29.87s
Response Time (total) 114.20s 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-5.2 Chat 8.7 7.9 91.7% 1 3.40s 1,807 0
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-5.2 Chat 10.0 10.0 100.0% 0 9.12s 1,243 0
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-5.2 Chat 10.0 10.0 100.0% 0 3.05s 980 0
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-5.2 Chat 5.3 10.0 33.3% 0 17.78s 7,810 0
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-5.2 Chat 4.4 3.0 33.3% 1 3.20s 335 0
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-5.2 Chat 7.5 6.1 83.3% 1 5.46s 1,528 0
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-5.2 Chat 7.7 10.0 66.7% 0 4.42s 1,743 0
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-5.2 Chat 10.0 10.0 100.0% 0 4.68s 555 0
Grok 4.20 3.0 10.0 0.0% 0 13.68s 197 6,620

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