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

Last updated at: 2026-05-28

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 7.3 7.4
Rank #63 #55
Reliability 10.0 5.0
Consistency 9.2 8.3
Tests Correct
Attempt pass rate 65.0% 71.7%
Flaky tests 2 4
Total Runs 60 60
Cost per result 4.324 2.382
Total Cost $0.519 $0.279
Input Price $5.000 / 1M $0.980 / 1M
Output Price $25.000 / 1M $3.080 / 1M
Output Tokens 8,098 11,511
Reasoning Tokens 0 71,979
Response Time (avg) 3.51s 33.45s
Response Time (max) 17.73s 172.60s
Response Time (total) 70.19s 635.63s

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) Output Tokens Reasoning Tokens
Claude Opus 4.8 6.5 10.0 50.0% 0 3.40s 1,472 0
GLM 5.1 10.0 10.0 100.0% 0 8.31s 401 5,122
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 6.8 10.0 50.0% 0 3.59s 1,323 0
GLM 5.1 4.7 1.6 66.7% 2 145.56s 4,727 34,384
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 9.5 10.0 100.0% 0 17.73s 3,259 0
GLM 5.1 9.5 10.0 100.0% 0 43.11s 327 4,206
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 7.3 5.8 83.3% 1 1.77s 308 0
GLM 5.1 10.0 10.0 100.0% 0 9.33s 991 4,552
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 5.3 7.2 44.4% 1 1.66s 61 0
GLM 5.1 5.3 10.0 33.3% 0 29.77s 969 11,314
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 3.48s 230 0
GLM 5.1 10.0 10.0 100.0% 0 20.95s 2,875 2,875
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 9.9 10.0 100.0% 0 1.37s 95 0
GLM 5.1 6.4 5.8 66.7% 1 7.47s 204 1,617
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 7.7 10.0 66.7% 0 2.74s 783 0
GLM 5.1 8.2 7.2 88.9% 1 31.64s 935 5,730
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 10.0 10.0 100.0% 0 5.35s 355 0
GLM 5.1 3.0 10.0 0.0% 0 0ms 0 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 3.0 10.0 0.0% 0 3.41s 212 0
GLM 5.1 3.0 10.0 0.0% 0 29.40s 82 2,179

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