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OpenAI: gpt-oss-120b vs StepFun: Step 3.7 Flash

Summary

gpt-oss-120b vs Step 3.7 Flash benchmark comparison: Step 3.7 Flash leads on average score with 7.1 vs 6.7. gpt-oss-120b has the lower benchmark cost at $0.013 vs $1.148. gpt-oss-120b is faster at 22.28s vs 64.46s, with pass rates of 52.4% vs 63.5%.

Recommended model: gpt-oss-120b - Its score stays close to the best score here (6.7 vs 7.1), while costing about 94.5x less than Step 3.7 Flash.

Last updated at: 2026-06-18

Metric gpt-oss-120b gpt-oss-120b medium Release: 2025-08-05 Free Available Step 3.7 Flash Step 3.7 Flash high Release: 2026-05-29
Score 6.7 7.1
Rank #78 #63
Reliability 10.0 10.0
Consistency 8.0 8.2
Tests Correct
Attempt pass rate 52.4% 63.5%
Flaky tests 5 4
Total Runs 63 63
Cost per result 0.141 10.434
Total Cost $0.013 $1.148
Input Price $0.039 / 1M $0.200 / 1M
Output Price $0.180 / 1M $1.150 / 1M
Total Input Tokens 39,084 38,391
Output Tokens 20,013 991,355
Reasoning Tokens 50,233 0
Response Time (avg) 22.28s 64.46s
Response Time (max) 68.16s 364.99s
Response Time (total) 311.96s 1353.57s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#78 gpt-oss-120b

medium
Cost
$0.001
Time
26.7s
Tokens
555 tok

#63 Step 3.7 Flash

high
Cost
$0.007
Time
63.6s
Tokens
6,030 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 6.7 9.9 50.0% 0 10.21s 1,314 3,518 2,177
Step 3.7 Flash 10.0 10.0 100.0% 0 13.40s 696 42,656 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 5.9 7.0 55.6% 1 38.37s 7,782 3,365 11,973
Step 3.7 Flash 4.0 6.0 22.2% 1 206.21s 6,057 327,340 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 10.0 10.0 100.0% 0 31.18s 11,535 694 5,072
Step 3.7 Flash 10.0 10.0 100.0% 0 13.01s 13,638 8,802 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 6.4 5.9 66.7% 1 1.98s 7,476 241 1,114
Step 3.7 Flash 10.0 10.0 100.0% 0 14.72s 7,368 23,113 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 2.9 4.4 22.2% 2 50.92s 1,266 6,784 20,606
Step 3.7 Flash 4.1 4.4 44.5% 2 149.64s 783 410,502 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 4.3 10.0 0.0% 0 7.90s 659 107 387
Step 3.7 Flash 5.5 10.0 0.0% 0 4.17s 510 2,862 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 9.9 10.0 100.0% 0 7.63s 1,036 126 1,799
Step 3.7 Flash 9.8 10.0 100.0% 0 1.52s 705 2,010 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 5.3 7.2 44.4% 1 21.71s 1,190 1,790 2,264
Step 3.7 Flash 5.3 7.2 44.4% 1 10.22s 711 25,422 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 9.8 10.0 100.0% 0 6.91s 6,514 287 1,083
Step 3.7 Flash 10.0 10.0 100.0% 0 2.79s 7,701 1,172 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
gpt-oss-120b 3.0 10.0 0.0% 0 26.51s 312 3,101 3,758
Step 3.7 Flash 3.0 10.0 0.0% 0 149.34s 222 147,476 0

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