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OpenAI: GPT-5.2 Chat vs StepFun: Step 3.5 Flash

Last updated at: 2026-06-03

Metric GPT-5.2 Chat GPT-5.2 Chat none Release: 2025-12-11 Step 3.5 Flash Step 3.5 Flash medium Release: 2026-02-01
Score 7.9 7.4
Rank #30 #55
Reliability 10.0 10.0
Consistency 8.9 9.4
Tests Correct
Attempt pass rate 73.3% 59.7%
Flaky tests 3 1
Total Runs 60 57
Cost per result 2.703 0.133
Total Cost $0.352 $0.062
Input Price $1.750 / 1M $0.090 / 1M
Output Price $14.000 / 1M $0.300 / 1M
Total Input Tokens 31,593 33,555
Output Tokens 21,144 90,478
Reasoning Tokens 0 173,544
Response Time (avg) 6.82s 43.20s
Response Time (max) 38.52s 170.45s
Response Time (total) 136.34s 561.54s

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Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 8.7 7.9 91.7% 1 3.40s 606 1,807 0
Step 3.5 Flash 10.0 10.0 100.0% 0 40.57s 694 20,391 24,176
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 8.2 6.7 83.3% 1 8.05s 4,686 4,131 0
Step 3.5 Flash 3.5 7.8 0.0% 0 62.83s 1,335 12,098 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 9.12s 11,019 1,243 0
Step 3.5 Flash 10.0 10.0 100.0% 0 29.57s 13,638 1,176 12,984
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 3.05s 7,140 980 0
Step 3.5 Flash 10.0 10.0 100.0% 0 15.01s 7,368 600 13,886
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 5.3 10.0 33.3% 0 17.78s 723 7,810 0
Step 3.5 Flash 5.3 7.2 44.4% 1 170.45s 673 45,350 90,436
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 4.4 3.0 33.3% 1 3.20s 477 335 0
Step 3.5 Flash 5.5 10.0 0.0% 0 22.39s 509 240 3,506
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 9.8 10.0 100.0% 0 5.51s 660 1,441 0
Step 3.5 Flash 8.3 10.0 50.0% 0 4.78s 705 2,364 3,521
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 7.7 10.0 66.7% 0 4.10s 642 1,603 0
Step 3.5 Flash 5.3 10.0 33.3% 0 7.22s 711 5,630 10,861
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 10.0 10.0 100.0% 0 4.68s 5,445 555 0
Step 3.5 Flash 10.0 10.0 100.0% 0 11.91s 7,701 275 3,802
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
GPT-5.2 Chat 3.0 10.0 0.0% 0 6.89s 195 1,239 0
Step 3.5 Flash 3.0 10.0 0.0% 0 108.45s 221 2,354 10,372

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