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OpenAI: GPT-5.5 vs Z.ai: GLM 5

Last updated at: 2026-04-26

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 GLM 5 GLM 5 medium Release: 2026-02-12
Score 9.0 8.4
Rank #5 #16
Reliability 10.0 N/A
Consistency 9.6 8.2
Tests Correct
Attempt pass rate 87.0% 85.2%
Flaky tests 1 4
Total Runs 54 54
Cost per result 4.534 1.188
Total Cost $0.681 $0.155
Input Price $5.000 / 1M $0.600 / 1M
Output Price $30.000 / 1M $2.080 / 1M
Output Tokens 1,959 20,163
Reasoning Tokens 16,134 58,337
Response Time (avg) 8.39s 23.34s
Response Time (max) 56.19s 79.09s
Response Time (total) 151.01s 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-5.5 10.0 10.0 100.0% 0 4.15s 232 1,056
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-5.5 10.0 10.0 100.0% 0 7.79s 369 936
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-5.5 10.0 10.0 100.0% 0 9.56s 303 717
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-5.5 10.0 10.0 100.0% 0 3.28s 228 157
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-5.5 5.3 10.0 33.3% 0 27.57s 69 11,731
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-5.5 10.0 10.0 100.0% 0 3.45s 143 132
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-5.5 9.9 10.0 100.0% 0 2.98s 93 356
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-5.5 9.0 7.9 88.9% 1 4.48s 272 948
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-5.5 10.0 10.0 100.0% 0 4.96s 250 101
GLM 5 10.0 10.0 100.0% 0 15.93s 233 994

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