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Anthropic: Claude Opus 4.8 vs Z.ai: GLM 5.1

Summary

Claude Opus 4.8 vs GLM 5.1 (medium) benchmark comparison: Claude Opus 4.8 leads on average score with 7.2 vs 7.1. GLM 5.1 (medium) has the lower benchmark cost at $0.288 vs $0.539. Claude Opus 4.8 is faster at 3.48s vs 33.67s, with pass rates of 61.9% vs 68.3%.

Recommended model: Claude Opus 4.8 - It has the best score here (7.2), while responding about 9.7x faster than GLM 5.1 (medium).

Last updated at: 2026-07-10

Metric Claude Opus 4.8 Claude Opus 4.8 none Release: 2026-05-28 GLM 5.1 GLM 5.1 medium Release: 2026-04-07
Score 7.2 7.1
Rank #70 #77
Reliability 10.0 6.7
Consistency 9.2 8.3
Tests Correct
Attempt pass rate 61.9% 68.3%
Flaky tests 2 4
Total Runs 63 63
Cost per result 4.485 2.496
Total Cost $0.539 $0.288
Input Price $5.000 / 1M $0.966 / 1M
Output Price $25.000 / 1M $3.036 / 1M
Total Input Tokens 67,104 32,995
Output Tokens 8,107 11,655
Reasoning Tokens 0 75,421
Response Time (avg) 3.48s 33.67s
Response Time (max) 17.73s 172.60s
Response Time (total) 73.00s 673.41s

Generation showcase

Hamster playing table tennis

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

#70 Claude Opus 4.8

none
Cost
$0.053
Time
22.0s
Tokens
2,253 tok

#77 GLM 5.1

medium
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
Claude Opus 4.8 6.5 10.0 50.0% 0 3.40s 834 1,472 0
GLM 5.1 10.0 10.0 100.0% 0 8.31s 555 401 5,122
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 5.5 10.0 33.3% 0 3.29s 10,590 1,332 0
GLM 5.1 4.6 3.7 44.5% 2 109.63s 5,702 4,871 37,826
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 9.5 10.0 100.0% 0 17.73s 29,658 3,259 0
GLM 5.1 9.5 10.0 100.0% 0 43.11s 17,298 327 4,206
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 7.3 5.8 83.3% 1 1.77s 10,503 308 0
GLM 5.1 10.0 10.0 100.0% 0 9.33s 7,107 991 4,552
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 7.2 44.4% 1 1.70s 975 61 0
GLM 5.1 5.3 10.0 33.3% 0 29.77s 489 969 11,314
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 3.48s 708 230 0
GLM 5.1 10.0 10.0 100.0% 0 20.95s 477 2,875 2,875
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 9.9 10.0 100.0% 0 1.37s 909 95 0
GLM 5.1 6.4 5.8 66.7% 1 7.47s 634 204 1,617
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Opus 4.8 7.7 10.0 66.7% 0 2.74s 894 783 0
GLM 5.1 8.2 7.2 88.9% 1 31.64s 609 935 5,730
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 5.35s 11,775 355 0
GLM 5.1 3.0 10.0 0.0% 0 0ms 0 0 0
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 3.41s 258 212 0
GLM 5.1 3.0 10.0 0.0% 0 29.40s 124 82 2,179

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