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OpenAI: GPT-5.5 vs Z.ai: GLM 5.2

Summary

GPT-5.5 vs GLM 5.2 benchmark comparison: GPT-5.5 leads on average score with 9.0 vs 7.1. GLM 5.2 has the lower benchmark cost at $0.076 vs $3.679. GLM 5.2 is faster at 6.34s vs 37.98s, with pass rates of 87.3% vs 60.3%.

Recommended model: GLM 5.2 - It offers the best overall trade-off: a competitive score (7.1), lower cost than GPT-5.5, and balanced response time.

Last updated at: 2026-06-18

Metric GPT-5.5 GPT-5.5 medium Release: 2026-04-24 GLM 5.2 GLM 5.2 none Release: 2026-06-17
Score 9.0 7.1
Rank #9 #61
Reliability 10.0 9.9
Consistency 8.9 9.6
Tests Correct
Attempt pass rate 87.3% 60.3%
Flaky tests 3 1
Total Runs 63 63
Cost per result 21.638 0.628
Total Cost $3.679 $0.076
Input Price $5.000 / 1M $1.400 / 1M
Output Price $30.000 / 1M $4.400 / 1M
Total Input Tokens 34,212 38,671
Output Tokens 1,985 4,817
Reasoning Tokens 114,925 0
Response Time (avg) 37.98s 6.34s
Response Time (max) 332.10s 20.69s
Response Time (total) 797.60s 133.19s

Generation showcase

Hamster playing table tennis

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

#9 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 tok

#61 GLM 5.2

none
Invalid SVG
Cost
$0.033
Time
87.7s
Tokens
7,455 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 10.0 10.0 100.0% 0 4.66s 606 250 1,335
GLM 5.2 8.3 10.0 75.0% 0 3.70s 567 313 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959
GLM 5.2 3.7 9.5 0.0% 0 7.55s 7,263 1,958 0
Combined 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 19.29s 11,019 312 2,841
GLM 5.2 10.0 10.0 100.0% 0 20.69s 14,296 1,489 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 4.18s 7,140 234 593
GLM 5.2 10.0 10.0 100.0% 0 7.17s 7,113 204 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 5.3 7.2 44.4% 1 164.14s 723 67 79,625
GLM 5.2 5.3 10.0 33.3% 0 6.50s 696 27 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 4.16s 477 138 223
GLM 5.2 6.1 3.1 66.7% 1 4.42s 480 82 0
Instructions following 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 3.36s 660 93 538
GLM 5.2 9.8 10.0 100.0% 0 3.84s 642 66 0
Puzzle Solving 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 6.76s 642 241 2,225
GLM 5.2 7.7 10.0 66.7% 0 3.31s 618 265 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 10.57s 5,445 258 832
GLM 5.2 10.0 10.0 100.0% 0 15.76s 6,807 400 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 2.8 1.6 33.3% 1 37.86s 195 30 1,754
GLM 5.2 3.0 10.0 0.0% 0 3.41s 189 13 0

Quick Compare

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