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OpenAI: GPT-5.2 vs xAI: Grok 4.20

Last updated at: 2026-04-02

Metric GPT-5.2 GPT-5.2 medium Release: 2025-12-11 Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.3 7.1
Rank #36 #40
Consistency 8.0 8.2
Tests Correct
Attempt pass rate 70.6% 66.7%
Flaky tests 4 4
Total Runs 51 51
Cost per result 3.131 7.358
Total Cost $0.314 $0.663
Input Price $1.750 / 1M $2.000 / 1M
Output Price $14.000 / 1M $6.000 / 1M
Output Tokens 2,238 1,494
Reasoning Tokens 16,811 97,078
Response Time (avg) 13.93s 9.50s
Response Time (max) 77.80s 29.87s
Response Time (total) 139.29s 161.54s

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
GPT-5.2 6.5 8.0 58.3% 1 7.81s 567 2,002
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 10.0 10.0 100.0% 0 14.06s 291 1,757
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 10.0 10.0 100.0% 0 3.15s 234 420
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 5.9 7.2 55.6% 1 77.80s 42 10,342
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 3.7 9.7 0.0% 0 4.32s 162 269
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 9.9 10.0 100.0% 0 3.12s 94 614
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 7.7 7.3 77.8% 1 5.47s 609 938
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 4.7 1.6 66.7% 1 10.30s 239 469
Grok 4.20 3.0 10.0 0.0% 0 13.68s 197 6,620

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