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xAI: Grok 4.20 vs Z.ai: GLM 5

Last updated at: 2026-05-10

Metric Grok 4.20 Grok 4.20 medium Release: 2026-03-31 GLM 5 GLM 5 none Release: 2026-02-12
Score 6.9 6.5
Rank #68 #80
Reliability 10.0 10.0
Consistency 8.3 9.7
Tests Correct
Attempt pass rate 63.2% 49.1%
Flaky tests 4 1
Total Runs 57 57
Cost per result 7.559 0.219
Total Cost $0.756 $0.020
Input Price $1.250 / 1M $0.600 / 1M
Output Price $2.500 / 1M $1.920 / 1M
Output Tokens 1,784 1,972
Reasoning Tokens 128,233 0
Response Time (avg) 14.53s 4.18s
Response Time (max) 63.48s 11.07s
Response Time (total) 276.06s 50.12s

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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
Grok 4.20 8.2 7.9 83.3% 1 3.95s 287 8,312
GLM 5 4.8 10.0 25.0% 0 2.37s 275 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 4.3 1.1 66.7% 1 24.33s 250 12,804
GLM 5 5.6 3.5 33.3% 1 8.84s 408 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 10.0 10.0 100.0% 0 17.40s 232 9,556
GLM 5 3.0 10.0 0.0% 0 4.98s 406 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 10.0 10.0 100.0% 0 4.17s 180 5,333
GLM 5 10.0 10.0 100.0% 0 5.78s 203 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 5.3 10.0 33.3% 0 27.03s 375 49,339
GLM 5 3.0 10.0 0.0% 0 2.24s 19 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 3.9 2.6 33.3% 1 24.48s 65 6,440
GLM 5 10.0 10.0 100.0% 0 3.27s 103 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 7.3 6.0 83.3% 1 4.42s 40 5,474
GLM 5 10.0 10.0 100.0% 0 1.48s 61 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 7.7 10.0 66.7% 0 6.20s 149 7,913
GLM 5 7.7 10.0 66.7% 0 2.05s 264 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 3.0 10.0 0.0% 0 13.68s 197 6,620
GLM 5 10.0 10.0 100.0% 0 11.07s 220 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Grok 4.20 3.0 10.0 0.0% 0 63.48s 9 16,442
GLM 5 3.0 10.0 0.0% 0 3.62s 13 0

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