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OpenAI: GPT-5.3-Codex vs Z.ai: GLM 5

Last updated at: 2026-04-11

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 GLM 5 GLM 5 medium Release: 2026-02-12
Score 8.6 8.4
Rank #5 #11
Consistency 8.7 8.2
Tests Correct
Attempt pass rate 83.3% 85.2%
Flaky tests 3 4
Total Runs 54 54
Cost per result 4.405 1.188
Total Cost $0.573 $0.155
Input Price $1.750 / 1M $0.720 / 1M
Output Price $14.000 / 1M $2.300 / 1M
Output Tokens 2,279 20,163
Reasoning Tokens 35,179 58,337
Response Time (avg) 15.38s 23.34s
Response Time (max) 100.93s 79.09s
Response Time (total) 276.91s 233.40s

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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-5.3-Codex 8.7 7.9 91.7% 1 4.16s 240 1,722
GLM 5 10.0 10.0 100.0% 0 23.66s 480 7,056
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 8.95s 491 1,530
GLM 5 10.0 10.0 100.0% 0 79.09s 330 19,814
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.56s 364 2,731
GLM 5 10.0 10.0 100.0% 0 28.96s 662 3,242
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.07s 234 728
GLM 5 7.1 5.6 83.3% 1 8.90s 567 3,734
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 5.9 7.2 55.6% 1 64.31s 64 25,308
GLM 5 3.5 4.4 33.3% 2 0ms 13,176 14,137
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 4.6 10.0 0.0% 0 4.87s 187 331
GLM 5 6.1 3.1 66.7% 1 14.69s 2,020 2,248
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.04s 93 693
GLM 5 10.0 10.0 100.0% 0 7.25s 1,001 2,129
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 9.0 7.9 88.9% 1 5.12s 352 1,644
GLM 5 10.0 10.0 100.0% 0 15.64s 1,694 4,983
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492
GLM 5 10.0 10.0 100.0% 0 15.93s 233 994

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