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Anthropic: Claude Opus 4.8 vs Z.ai: GLM 5

Summary

Claude Opus 4.8 (medium) vs GLM 5 (medium) benchmark comparison: Claude Opus 4.8 (medium) leads on average score with 8.8 vs 8.6. GLM 5 (medium) has the lower benchmark cost at $0.228 vs $1.107. Claude Opus 4.8 (medium) is faster at 9.72s vs 33.54s, with pass rates of 84.1% vs 82.5%.

Recommended model: GLM 5 (medium) - Its score stays close to the best score here (8.6 vs 8.8), while costing about 4.9x less than Claude Opus 4.8 (medium).

Last updated at: 2026-07-10

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 GLM 5 GLM 5 medium Release: 2026-02-12
Score 8.8 8.6
Rank #15 #18
Reliability 10.0 10.0
Consistency 9.6 8.5
Tests Correct
Attempt pass rate 84.1% 82.5%
Flaky tests 1 4
Total Runs 63 63
Cost per result 6.512 1.668
Total Cost $1.107 $0.228
Input Price $5.000 / 1M $0.600 / 1M
Output Price $25.000 / 1M $1.920 / 1M
Total Input Tokens 61,007 35,224
Output Tokens 26,495 21,570
Reasoning Tokens 5,901 102,996
Response Time (avg) 9.72s 33.54s
Response Time (max) 38.03s 99.85s
Response Time (total) 204.19s 435.99s

Generation showcase

Hamster playing table tennis

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

#15 Claude Opus 4.8

medium
Cost
$0.057
Time
23.1s
Tokens
2,412 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
Claude Opus 4.8 10.0 10.0 100.0% 0 3.95s 834 1,179 478
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
Claude Opus 4.8 10.0 10.0 100.0% 0 15.33s 10,590 9,945 1,381
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
Claude Opus 4.8 9.8 10.0 100.0% 0 38.03s 23,561 5,260 1,588
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
Claude Opus 4.8 7.1 5.6 83.3% 1 12.29s 10,503 481 312
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
Claude Opus 4.8 5.3 10.0 33.3% 0 14.59s 975 7,477 900
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
Claude Opus 4.8 10.0 10.0 100.0% 0 2.46s 708 237 0
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
Claude Opus 4.8 10.0 10.0 100.0% 0 3.32s 909 373 320
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
Claude Opus 4.8 10.0 10.0 100.0% 0 3.95s 894 791 483
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
Claude Opus 4.8 10.0 10.0 100.0% 0 8.96s 11,775 301 225
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
Claude Opus 4.8 3.0 10.0 0.0% 0 6.14s 258 451 214
GLM 5 3.0 10.0 0.0% 0 67.37s 186 401 12,450

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