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Anthropic: Claude Opus 4.8 vs Qwen: Qwen3.5 Plus 2026-02-15

Last updated at: 2026-05-28

Metric Claude Opus 4.8 Claude Opus 4.8 medium Release: 2026-05-28 Qwen3.5 Plus 2026-02-15 Qwen3.5 Plus 2026-02-15 medium Release: 2026-02-15
Score 8.7 8.1
Rank #12 #22
Reliability 10.0 10.0
Consistency 9.6 8.8
Tests Correct
Attempt pass rate 83.3% 76.7%
Flaky tests 1 3
Total Runs 60 60
Cost per result 6.285 2.251
Total Cost $1.006 $0.283
Input Price $5.000 / 1M $0.260 / 1M
Output Price $25.000 / 1M $1.560 / 1M
Output Tokens 23,201 2,145
Reasoning Tokens 5,901 172,563
Response Time (avg) 9.34s 67.58s
Response Time (max) 38.03s 266.69s
Response Time (total) 186.84s 878.57s

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 10.0 10.0 100.0% 0 3.95s 1,179 478
Qwen3.5 Plus 2026-02-15 8.2 7.9 83.3% 1 45.78s 205 21,236
Coding 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 14.97s 6,651 1,381
Qwen3.5 Plus 2026-02-15 7.6 6.7 66.7% 1 193.80s 406 63,554
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 9.8 10.0 100.0% 0 38.03s 5,260 1,588
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 46.85s 421 7,906
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 7.1 5.6 83.3% 1 12.29s 481 312
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 46.91s 270 14,916
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Opus 4.8 5.3 10.0 33.3% 0 14.15s 7,477 900
Qwen3.5 Plus 2026-02-15 5.3 10.0 33.3% 0 17.50s 35 16,680
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 2.46s 237 0
Qwen3.5 Plus 2026-02-15 4.7 1.6 66.7% 1 79.86s 73 8,675
Instructions following 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 3.32s 373 320
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 31.93s 101 7,704
Puzzle Solving 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 3.95s 791 483
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 32.50s 301 13,853
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 8.96s 301 225
Qwen3.5 Plus 2026-02-15 10.0 10.0 100.0% 0 7.54s 309 909
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 6.14s 451 214
Qwen3.5 Plus 2026-02-15 3.0 10.0 0.0% 0 103.81s 24 17,130

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