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Anthropic: Claude Opus 4.6 vs StepFun: Step 3.5 Flash

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

Summary

Metric Anthropic: Claude Opus 4.6 medium Release: Unknown release date StepFun: Step 3.5 Flash medium Release: Unknown release date Free Available
Rank #20 #11
Score 6.07 7.00
Consistency 8.80 8.32
Cost per result 10.992 0.000
Total Cost $0.880 $0.000
Tests Correct
Wrong Tests 6 5
Attempt pass rate 61.9% 73.8%
Flaky tests 2 3
Output Tokens 19,576 60,502
Reasoning Tokens 11,081 117,044

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
Anthropic: Claude Opus 4.6 4.00 4.41 55.6% 2 897 1,000
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 Opus 4.6 10.00 10.00 100.0% 0 668 763
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 Opus 4.6 1.00 10.00 0.0% 0 16,328 7,928
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 Opus 4.6 9.50 9.99 100.0% 0 266 468
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 Opus 4.6 7.00 10.00 66.7% 0 556 593
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 Opus 4.6 10.00 10.00 100.0% 0 861 329
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 275 3,802

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