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

Summary

GPT-5.6 Terra (medium) vs GLM 5.2 (high) benchmark comparison: GLM 5.2 (high) leads on average score with 8.0 vs 7.8. GPT-5.6 Terra (medium) has the lower benchmark cost at $0.496 vs $0.554. GPT-5.6 Terra (medium) is faster at 6.69s vs 37.09s, with pass rates of 68.3% vs 77.8%.

Recommended model: GPT-5.6 Terra (medium) - Its score stays close to the best score here (7.8 vs 8.0), while responding about 5.5x faster than GLM 5.2 (high).

Last updated at: 2026-07-10

Metric GPT-5.6 Terra GPT-5.6 Terra medium Release: 2026-07-09 GLM 5.2 GLM 5.2 high Release: 2026-06-17
Score 7.8 8.0
Rank #38 #32
Reliability 10.0 9.3
Consistency 9.2 7.6
Tests Correct
Attempt pass rate 68.3% 77.8%
Flaky tests 2 6
Total Runs 63 63
Cost per result 3.815 4.255
Total Cost $0.496 $0.554
Input Price $2.500 / 1M $0.770 / 1M
Output Price $15.000 / 1M $2.420 / 1M
Total Input Tokens 34,218 34,993
Output Tokens 1,982 51,575
Reasoning Tokens 25,370 166,065
Response Time (avg) 6.69s 37.09s
Response Time (max) 41.68s 180.69s
Response Time (total) 140.49s 778.91s

Generation showcase

Hamster playing table tennis

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

#38 GPT-5.6 Terra

medium
Cost
$0.035
Time
16.3s
Tokens
2,418 tok

#32 GLM 5.2

high
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 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 Terra 8.3 10.0 75.0% 0 2.22s 606 172 657
GLM 5.2 10.0 10.0 100.0% 0 5.80s 639 406 2,660
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.6 Terra 6.1 7.2 55.6% 1 7.19s 7,302 427 4,527
GLM 5.2 6.4 4.4 77.8% 2 73.03s 5,124 2,302 22,546
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.6 Terra 10.0 10.0 100.0% 0 6.26s 11,019 316 540
GLM 5.2 10.0 10.0 100.0% 0 43.51s 12,696 711 4,267
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 Terra 10.0 10.0 100.0% 0 872ms 7,140 222 0
GLM 5.2 10.0 10.0 100.0% 0 5.81s 7,143 435 1,414
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.6 Terra 5.3 10.0 33.3% 0 23.45s 723 70 15,327
GLM 5.2 3.5 4.4 33.3% 2 73.97s 551 46,693 90,566
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.6 Terra 5.5 10.0 0.0% 0 2.37s 477 133 144
GLM 5.2 10.0 10.0 100.0% 0 12.90s 498 63 1,743
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.6 Terra 10.0 10.0 100.0% 0 1.43s 660 89 261
GLM 5.2 10.0 10.0 100.0% 0 4.26s 678 151 1,210
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.6 Terra 8.4 7.4 88.9% 1 3.78s 642 272 1,462
GLM 5.2 6.0 4.6 66.7% 2 33.71s 665 568 22,392
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.6 Terra 10.0 10.0 100.0% 0 5.09s 5,454 254 246
GLM 5.2 10.0 10.0 100.0% 0 9.25s 6,861 246 503
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.6 Terra 3.0 10.0 0.0% 0 10.05s 195 27 2,206
GLM 5.2 3.0 10.0 0.0% 0 127.82s 138 0 18,764

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