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Anthropic: Claude Opus 4.8 vs Qwen: Qwen3.5-Flash

Last updated at: 2026-05-28

Metric Claude Opus 4.8 Claude Opus 4.8 none Release: 2026-05-28 Qwen3.5-Flash Qwen3.5-Flash medium Release: 2026-02-24
Score 7.3 7.6
Rank #63 #48
Reliability 10.0 10.0
Consistency 9.2 8.0
Tests Correct
Attempt pass rate 65.0% 75.0%
Flaky tests 2 5
Total Runs 60 60
Cost per result 4.324 0.821
Total Cost $0.519 $0.074
Input Price $5.000 / 1M $0.065 / 1M
Output Price $25.000 / 1M $0.260 / 1M
Output Tokens 8,098 2,074
Reasoning Tokens 0 272,063
Response Time (avg) 3.51s 63.04s
Response Time (max) 17.73s 234.29s
Response Time (total) 70.19s 1197.71s

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
Qwen3.5-Flash 10.0 10.0 100.0% 0 59.11s 383 32,992
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
Qwen3.5-Flash 4.1 5.8 33.3% 1 54.23s 288 67,546
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
Qwen3.5-Flash 10.0 10.0 100.0% 0 17.78s 483 8,270
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
Qwen3.5-Flash 7.3 5.9 83.3% 1 56.99s 235 16,237
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
Qwen3.5-Flash 5.3 7.2 44.4% 1 146.50s 58 43,615
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
Qwen3.5-Flash 6.1 3.1 66.7% 1 40.05s 99 38,486
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
Qwen3.5-Flash 10.0 10.0 100.0% 0 63.49s 98 14,139
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
Qwen3.5-Flash 8.2 7.2 88.9% 1 27.61s 89 12,457
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
Qwen3.5-Flash 10.0 10.0 100.0% 0 10.33s 309 1,284
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
Qwen3.5-Flash 3.0 10.0 0.0% 0 48.98s 32 37,037

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