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

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Last updated at : 2026-02-27 15:16

Summary

Metric OpenAI: GPT-5.3-Codex medium Release: Unknown release date Z.ai: GLM 5 medium Release: Unknown release date
Rank #7 #9
Score 7.93 7.29
Consistency 8.84 8.18
Cost per result 4.641 1.196
Total Cost $0.465 $0.120
Tests Correct
Wrong Tests 4 4
Attempt pass rate 78.6% 83.3%
Flaky tests 2 3
Output Tokens 1,201 15,923
Reasoning Tokens 30,056 42,557

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 216 1,421
Z.ai: GLM 5 10.00 10.00 100.0% 0 420 4,992
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 234 735
Z.ai: GLM 5 5.00 5.62 83.3% 1 567 3,734
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 4.00 7.21 55.6% 1 64 25,308
Z.ai: GLM 5 1.00 4.41 33.3% 2 14,404 24,570
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 9.00 10.00 50.0% 0 93 693
Z.ai: GLM 5 9.50 9.99 100.0% 0 140 2,740
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 7.00 7.38 77.8% 1 340 1,407
Z.ai: GLM 5 10.00 10.00 100.0% 0 159 5,527
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: GPT-5.3-Codex 10.00 10.00 100.0% 0 254 492
Z.ai: GLM 5 10.00 10.00 100.0% 0 233 994

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