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OpenAI: GPT-5.6 Luna vs Z.ai: GLM 5

Summary

GPT-5.6 Luna (low) vs GLM 5 benchmark comparison: GPT-5.6 Luna (low) leads on average score with 6.2 vs 6.0. GLM 5 has the lower benchmark cost at $0.027 vs $0.141. GLM 5 is faster at 4.03s vs 4.35s, with pass rates of 57.1% vs 44.4%.

Recommended model: GLM 5 - Its score stays close to the best score here (6.0 vs 6.2), while costing about 5.4x less than GPT-5.6 Luna (low).

Last updated at: 2026-07-09

Metric GPT-5.6 Luna GPT-5.6 Luna low Release: 2026-07-09 GLM 5 GLM 5 none Release: 2026-02-12
Score 6.2 6.0
Rank #107 #117
Reliability 10.0 10.0
Consistency 8.5 9.7
Tests Correct
Attempt pass rate 57.1% 44.4%
Flaky tests 4 1
Total Runs 63 63
Cost per result 1.404 0.263
Total Cost $0.141 $0.027
Input Price $1.000 / 1M $0.600 / 1M
Output Price $6.000 / 1M $1.920 / 1M
Total Input Tokens 34,218 37,135
Output Tokens 2,110 1,989
Reasoning Tokens 15,571 0
Response Time (avg) 4.35s 4.03s
Response Time (max) 18.06s 11.07s
Response Time (total) 91.45s 56.37s

Generation showcase

Hamster playing table tennis

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

#107 GPT-5.6 Luna

low
Cost
$0.011
Time
10.2s
Tokens
1,897 tok

#117 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-5.6 Luna 8.3 10.0 75.0% 0 2.21s 606 186 722
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-5.6 Luna 5.5 10.0 33.3% 0 4.61s 7,302 557 3,535
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-5.6 Luna 2.8 1.6 33.3% 1 7.99s 11,019 300 1,060
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-5.6 Luna 10.0 10.0 100.0% 0 2.14s 7,140 234 292
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-5.6 Luna 3.6 7.2 22.2% 1 10.05s 723 70 6,718
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-5.6 Luna 5.0 10.0 0.0% 0 2.25s 477 122 169
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-5.6 Luna 8.5 6.8 83.3% 1 2.04s 660 93 259
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-5.6 Luna 7.6 7.2 77.8% 1 3.59s 642 271 1,207
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-5.6 Luna 10.0 10.0 100.0% 0 4.43s 5,454 250 177
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-5.6 Luna 3.0 10.0 0.0% 0 4.86s 195 27 1,432
GLM 5 3.0 10.0 0.0% 0 3.62s 186 13 0

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