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Anthropic: Claude Sonnet 4.6 vs StepFun: Step 3.5 Flash

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Last updated at : 2026-02-27 15:16

Summary

Metric Anthropic: Claude Sonnet 4.6 medium Release: Unknown release date StepFun: Step 3.5 Flash medium Release: Unknown release date Free Available
Rank #8 #11
Score 7.43 7.00
Consistency 9.40 8.32
Cost per result 8.105 0.000
Total Cost $0.811 $0.000
Tests Correct
Wrong Tests 4 5
Attempt pass rate 73.8% 73.8%
Flaky tests 1 3
Output Tokens 29,098 60,502
Reasoning Tokens 20,435 117,044

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Sonnet 4.6 7.00 10.00 66.7% 0 1,031 1,093
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 13,924 17,208
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Sonnet 4.6 10.00 10.00 100.0% 0 727 907
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 535 11,548
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Sonnet 4.6 1.00 7.21 11.1% 1 25,790 16,919
StepFun: Step 3.5 Flash 4.00 7.21 44.4% 1 40,942 74,237
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Sonnet 4.6 10.00 10.00 100.0% 0 316 523
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 2,121 3,274
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Sonnet 4.6 10.00 10.00 100.0% 0 579 642
StepFun: Step 3.5 Flash 2.00 4.96 33.3% 2 2,705 6,975
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Sonnet 4.6 10.00 10.00 100.0% 0 655 351
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 275 3,802

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