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

Last updated at: 2026-04-14

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 GLM 5 GLM 5 none Release: 2026-02-12
Score 8.6 6.6
Rank #5 #50
Consistency 8.7 9.6
Tests Correct
Attempt pass rate 83.3% 51.9%
Flaky tests 3 1
Total Runs 54 54
Cost per result 4.405 0.217
Total Cost $0.573 $0.020
Input Price $1.750 / 1M $0.720 / 1M
Output Price $14.000 / 1M $2.300 / 1M
Output Tokens 2,279 1,959
Reasoning Tokens 35,179 0
Response Time (avg) 15.38s 4.23s
Response Time (max) 100.93s 11.07s
Response Time (total) 276.91s 46.51s

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Score vs Total Cost

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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-5.3-Codex 8.7 7.9 91.7% 1 4.16s 240 1,722
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
GPT-5.3-Codex 10.0 10.0 100.0% 0 8.95s 491 1,530
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
GPT-5.3-Codex 10.0 10.0 100.0% 0 19.56s 364 2,731
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
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.07s 234 728
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
GPT-5.3-Codex 5.9 7.2 55.6% 1 64.31s 64 25,308
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
GPT-5.3-Codex 4.6 10.0 0.0% 0 4.87s 187 331
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
GPT-5.3-Codex 10.0 10.0 100.0% 0 3.04s 93 693
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
GPT-5.3-Codex 9.0 7.9 88.9% 1 5.12s 352 1,644
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
GPT-5.3-Codex 10.0 10.0 100.0% 0 6.37s 254 492
GLM 5 10.0 10.0 100.0% 0 11.07s 220 0

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