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

Summary

GPT-5.5 vs GLM 5 benchmark comparison: GPT-5.5 leads on average score with 6.3 vs 6.0. GLM 5 has the lower benchmark cost at $0.027 vs $0.231. GPT-5.5 is faster at 1.89s vs 4.03s, with pass rates of 54.0% vs 44.4%.

Recommended model: GLM 5 - Its score stays close to the best score here (6.0 vs 6.3), while costing about 8.8x less than GPT-5.5.

Last updated at: 2026-07-02

Metric GPT-5.5 GPT-5.5 none Release: 2026-04-24 GLM 5 GLM 5 none Release: 2026-02-12
Score 6.3 6.0
Rank #93 #104
Reliability 10.0 10.0
Consistency 8.8 9.7
Tests Correct
Attempt pass rate 54.0% 44.4%
Flaky tests 3 1
Total Runs 63 63
Cost per result 2.302 0.263
Total Cost $0.231 $0.027
Input Price $5.000 / 1M $0.600 / 1M
Output Price $30.000 / 1M $1.920 / 1M
Total Input Tokens 34,212 37,135
Output Tokens 1,971 1,989
Reasoning Tokens 0 0
Response Time (avg) 1.89s 4.03s
Response Time (max) 5.56s 11.07s
Response Time (total) 39.64s 56.37s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#93 GPT-5.5

none
Cost
$0.090
Time
54.3s
Tokens
3,063 tok

#104 GLM 5

none
Cost
$0.007
Time
32.1s
Tokens
2,023 tok

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) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 6.9 7.9 66.7% 1 1.31s 606 213 0
GLM 5 4.8 10.0 25.0% 0 2.37s 510 275 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 5.5 10.0 33.3% 0 1.35s 7,305 462 0
GLM 5 4.0 7.8 11.1% 1 5.12s 7,256 428 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 3.0 10.0 0.0% 0 5.56s 11,019 300 0
GLM 5 3.0 10.0 0.0% 0 4.98s 12,812 406 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 1.18s 7,140 222 0
GLM 5 10.0 10.0 100.0% 0 5.78s 7,107 203 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 2.9 7.2 11.1% 1 1.31s 723 52 0
GLM 5 3.0 10.0 0.0% 0 2.24s 643 19 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 3.41s 477 124 0
GLM 5 10.0 10.0 100.0% 0 3.27s 477 103 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 6.2 5.8 66.7% 1 1.15s 660 81 0
GLM 5 10.0 10.0 100.0% 0 1.48s 636 61 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 7.7 10.0 66.7% 0 1.29s 642 252 0
GLM 5 7.7 10.0 66.7% 0 1.91s 609 261 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 10.0 10.0 100.0% 0 3.90s 5,445 247 0
GLM 5 10.0 10.0 100.0% 0 11.07s 6,899 220 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 3.0 10.0 0.0% 0 5.01s 195 18 0
GLM 5 3.0 10.0 0.0% 0 3.62s 186 13 0

Quick Compare

Switch Comparison Pair

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