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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 9.0 vs 8.3. GLM 5 has the lower benchmark cost at $0.228 vs $0.907. GPT-5.5 is faster at 9.76s vs 33.54s, with pass rates of 85.7% vs 82.5%.

Recommended model: GLM 5 - Its score stays close to the best score here (8.3 vs 9.0), while costing about 4.0x less than GPT-5.5.

Last updated at: 2026-06-10

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 GLM 5 GLM 5 medium Release: 2026-02-12
Score 9.0 8.3
Rank #6 #18
Reliability 10.0 10.0
Consistency 10.0 8.5
Tests Correct
Attempt pass rate 85.7% 82.5%
Flaky tests 0 4
Total Runs 63 63
Cost per result 5.035 1.668
Total Cost $0.907 $0.228
Input Price $5.000 / 1M $0.600 / 1M
Output Price $30.000 / 1M $1.920 / 1M
Total Input Tokens 34,209 35,224
Output Tokens 2,046 21,570
Reasoning Tokens 22,460 102,996
Response Time (avg) 9.76s 33.54s
Response Time (max) 56.19s 99.85s
Response Time (total) 204.92s 435.99s

Generation showcase

Hamster playing table tennis

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

#6 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 tok

#18 GLM 5

medium
Cost
$0.005
Time
20.7s
Tokens
2,068 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 4.41s 606 238 1,020
GLM 5 10.0 10.0 100.0% 0 23.66s 555 480 7,056
Coding 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 15.04s 7,302 423 6,402
GLM 5 10.0 10.0 100.0% 0 74.30s 7,254 2,997 52,930
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 9.56s 11,019 303 717
GLM 5 10.0 10.0 100.0% 0 28.96s 12,804 662 3,242
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 3.28s 7,140 228 157
GLM 5 7.1 5.6 83.3% 1 8.90s 5,508 567 3,734
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 10.0 33.3% 0 28.05s 723 69 11,609
GLM 5 3.5 4.4 33.3% 2 0ms 260 13,176 14,137
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 5.17s 477 133 245
GLM 5 6.1 3.1 66.7% 1 14.69s 477 2,020 2,248
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.5 9.9 10.0 100.0% 0 3.74s 660 93 415
GLM 5 10.0 10.0 100.0% 0 7.25s 636 1,001 2,129
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 4.74s 642 279 954
GLM 5 10.0 10.0 100.0% 0 11.33s 609 33 4,076
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 4.96s 5,445 250 101
GLM 5 10.0 10.0 100.0% 0 15.93s 6,935 233 994
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 10.06s 195 30 840
GLM 5 3.0 10.0 0.0% 0 67.37s 186 401 12,450

Quick Compare

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