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Anthropic: Claude Sonnet 4.6 vs DeepSeek: DeepSeek V4 Flash

Last updated at: 2026-04-24

Metric Claude Sonnet 4.6 Claude Sonnet 4.6 medium Release: 2026-02-17 DeepSeek V4 Flash DeepSeek V4 Flash high Release: 2026-04-24
Score 8.0 7.8
Rank #30 #35
Consistency 9.5 7.8
Tests Correct
Attempt pass rate 74.1% 79.6%
Flaky tests 1 5
Total Runs 54 52
Cost per result 8.930 0.189
Total Cost $1.161 $0.021
Input Price $3.000 / 1M $0.140 / 1M
Output Price $15.000 / 1M $0.280 / 1M
Output Tokens 42,068 1,757
Reasoning Tokens 26,784 55,907
Response Time (avg) 12.66s 47.47s
Response Time (max) 46.35s 255.28s
Response Time (total) 126.62s 854.45s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 6.5 10.0 50.0% 0 2.98s 1,046 1,093
DeepSeek V4 Flash 8.3 10.0 75.0% 0 28.51s 140 7,770
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 35.76s 6,894 2,097
DeepSeek V4 Flash 10.0 10.0 100.0% 0 62.48s 369 9,361
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 46.35s 5,871 3,962
DeepSeek V4 Flash 10.0 10.0 100.0% 0 76.57s 465 7,347
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 13.90s 649 742
DeepSeek V4 Flash 10.0 10.0 100.0% 0 28.03s 201 1,179
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 2.9 7.2 11.1% 1 0ms 25,790 16,919
DeepSeek V4 Flash 4.1 4.4 44.5% 2 112.69s 19 24,857
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 4.94s 256 433
DeepSeek V4 Flash 6.1 3.1 66.7% 1 25.15s 79 632
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 2.61s 318 552
DeepSeek V4 Flash 10.0 10.0 100.0% 0 15.36s 63 1,622
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 4.80s 589 635
DeepSeek V4 Flash 6.4 4.5 77.8% 2 25.53s 193 2,597
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Claude Sonnet 4.6 10.0 10.0 100.0% 0 7.48s 655 351
DeepSeek V4 Flash 10.0 10.0 100.0% 0 74.73s 228 542

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