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OpenAI: gpt-oss-120b vs StepFun: Step 3.5 Flash

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

Summary

Metric OpenAI: gpt-oss-120b medium Release: Unknown release date Free Available StepFun: Step 3.5 Flash medium Release: Unknown release date Free Available
Rank #25 #11
Score 5.64 7.00
Consistency 7.55 8.32
Cost per result 0.101 0.000
Total Cost $0.008 $0.000
Tests Correct
Wrong Tests 7 5
Attempt pass rate 59.5% 73.8%
Flaky tests 4 3
Output Tokens 11,407 60,502
Reasoning Tokens 26,106 117,044

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Output Tokens Reasoning Tokens
OpenAI: gpt-oss-120b 7.00 9.81 66.7% 0 3,463 2,077
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
OpenAI: gpt-oss-120b 5.50 5.87 66.7% 1 241 1,114
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
OpenAI: gpt-oss-120b 1.00 4.41 22.2% 2 6,018 18,520
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
OpenAI: gpt-oss-120b 10.00 10.00 100.0% 0 120 1,770
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
OpenAI: gpt-oss-120b 5.00 7.13 44.4% 1 1,278 1,542
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
OpenAI: gpt-oss-120b 9.00 9.97 100.0% 0 287 1,083
StepFun: Step 3.5 Flash 10.00 10.00 100.0% 0 275 3,802

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