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Anthropic: Claude Opus 4.8 vs MoonshotAI: Kimi K2.6

Last updated at: 2026-05-28

Metric Claude Opus 4.8 Claude Opus 4.8 none Release: 2026-05-28 Kimi K2.6 Kimi K2.6 medium Release: 2026-04-20 Free Available
Score 7.3 7.4
Rank #63 #58
Reliability 10.0 10.0
Consistency 9.2 8.3
Tests Correct
Attempt pass rate 65.0% 70.8%
Flaky tests 2 4
Total Runs 60 60
Cost per result 4.324 7.621
Total Cost $0.519 $0.820
Input Price $5.000 / 1M $0.730 / 1M
Output Price $25.000 / 1M $3.490 / 1M
Output Tokens 8,098 102,208
Reasoning Tokens 0 229,120
Response Time (avg) 3.51s 54.03s
Response Time (max) 17.73s 215.85s
Response Time (total) 70.19s 1026.57s

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 6.5 10.0 50.0% 0 3.40s 1,472 0
Kimi K2.6 7.0 8.0 66.7% 1 11.59s 7,115 8,934
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
Kimi K2.6 6.5 5.3 75.0% 1 118.23s 9,255 52,215
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
Kimi K2.6 10.0 10.0 100.0% 0 40.96s 711 13,876
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
Kimi K2.6 10.0 10.0 100.0% 0 20.38s 316 11,305
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
Kimi K2.6 5.3 7.2 44.4% 1 202.38s 47,035 98,262
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
Kimi K2.6 10.0 10.0 100.0% 0 17.83s 3,981 4,472
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
Kimi K2.6 10.0 10.0 100.0% 0 12.53s 3,977 5,269
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
Kimi K2.6 6.0 7.4 55.6% 1 25.06s 13,860 17,599
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
Kimi K2.6 10.0 10.0 100.0% 0 8.92s 248 1,011
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
Kimi K2.6 3.0 10.0 0.0% 0 130.27s 15,710 16,177

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