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OpenAI: GPT-5.6 Luna vs Z.ai: GLM 5.2

Summary

GPT-5.6 Luna (medium) vs GLM 5.2 benchmark comparison: GPT-5.6 Luna (medium) leads on average score with 7.6 vs 7.1. GLM 5.2 has the lower benchmark cost at $0.030 vs $0.258. GLM 5.2 is faster at 6.34s vs 6.70s, with pass rates of 63.5% vs 60.3%.

Recommended model: GLM 5.2 - Its score stays close to the best score here (7.1 vs 7.6), while costing about 8.8x less than GPT-5.6 Luna (medium).

Last updated at: 2026-07-09

Metric GPT-5.6 Luna GPT-5.6 Luna medium Release: 2026-07-09 GLM 5.2 GLM 5.2 none Release: 2026-06-17
Score 7.6 7.1
Rank #54 #73
Reliability 10.0 9.9
Consistency 9.6 9.6
Tests Correct
Attempt pass rate 63.5% 60.3%
Flaky tests 1 1
Total Runs 63 63
Cost per result 1.978 0.628
Total Cost $0.258 $0.030
Input Price $1.000 / 1M $0.540 / 1M
Output Price $6.000 / 1M $1.760 / 1M
Total Input Tokens 35,699 38,671
Output Tokens 2,148 4,817
Reasoning Tokens 34,740 0
Response Time (avg) 6.70s 6.34s
Response Time (max) 29.85s 20.69s
Response Time (total) 140.62s 133.19s

Generation showcase

Hamster playing table tennis

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

#54 GPT-5.6 Luna

medium
Cost
$0.014
Time
14.6s
Tokens
2,362 tok

#73 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-5.6 Luna 8.3 10.0 75.0% 0 2.52s 606 160 987
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-5.6 Luna 5.4 7.2 44.4% 1 10.38s 7,302 564 9,928
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-5.6 Luna 10.0 10.0 100.0% 0 9.53s 12,500 375 1,354
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-5.6 Luna 10.0 10.0 100.0% 0 1.95s 7,140 234 324
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-5.6 Luna 5.3 10.0 33.3% 0 17.37s 723 68 16,531
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-5.6 Luna 5.1 10.0 0.0% 0 4.34s 477 112 496
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-5.6 Luna 9.9 10.0 100.0% 0 2.38s 660 95 393
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-5.6 Luna 7.8 10.0 66.7% 0 4.04s 642 255 2,104
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-5.6 Luna 10.0 10.0 100.0% 0 6.02s 5,454 256 244
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-5.6 Luna 3.0 10.0 0.0% 0 6.64s 195 29 2,379
GLM 5.2 3.0 10.0 0.0% 0 3.41s 189 13 0

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