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

Last updated at: 2026-05-22

Metric GPT-5.3-Codex GPT-5.3-Codex medium Release: 2026-02-05 GLM 5 GLM 5 medium Release: 2026-02-12
Score 8.3 8.2
Rank #15 #18
Reliability 10.0 10.0
Consistency 8.4 8.4
Tests Correct
Attempt pass rate 81.7% 81.7%
Flaky tests 4 4
Total Runs 60 60
Cost per result 4.891 1.688
Total Cost $0.685 $0.237
Input Price $1.750 / 1M $0.600 / 1M
Output Price $14.000 / 1M $1.920 / 1M
Output Tokens 2,332 23,219
Reasoning Tokens 42,616 96,679
Response Time (avg) 15.97s 33.39s
Response Time (max) 100.93s 99.85s
Response Time (total) 319.30s 400.62s

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-5.3-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 18.45s 514 7,266
GLM 5 10.0 10.0 100.0% 0 89.47s 2,985 45,706
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
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
GPT-5.3-Codex 2.8 1.6 33.3% 1 14.43s 30 1,701
GLM 5 3.0 10.0 0.0% 0 67.37s 401 12,450

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