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Google: Gemini 3.5 Flash vs OpenAI: gpt-oss-120b

Summary

Gemini 3.5 Flash vs gpt-oss-120b benchmark comparison: Gemini 3.5 Flash leads on average score with 6.8 vs 6.7. gpt-oss-120b has the lower benchmark cost at $0.013 vs $0.108. Gemini 3.5 Flash is faster at 1.57s vs 22.28s, with pass rates of 68.3% vs 52.4%.

Recommended model: gpt-oss-120b - Its score stays close to the best score here (6.7 vs 6.8), while costing about 8.8x less than Gemini 3.5 Flash.

Last updated at: 2026-06-12

Metric Gemini 3.5 Flash Gemini 3.5 Flash minimal Release: 2026-05-19 gpt-oss-120b gpt-oss-120b medium Release: 2025-08-05 Free Available
Score 6.8 6.7
Rank #71 #78
Reliability 10.0 10.0
Consistency 9.6 8.0
Tests Correct
Attempt pass rate 68.3% 52.4%
Flaky tests 1 5
Total Runs 63 63
Cost per result 0.767 0.141
Total Cost $0.108 $0.013
Input Price $1.500 / 1M $0.039 / 1M
Output Price $9.000 / 1M $0.180 / 1M
Total Input Tokens 39,847 39,084
Output Tokens 5,277 20,013
Reasoning Tokens 0 50,233
Response Time (avg) 1.57s 22.28s
Response Time (max) 5.51s 68.16s
Response Time (total) 33.02s 311.96s

Generation showcase

Hamster playing table tennis

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

#71 Gemini 3.5 Flash

minimal
Cost
$0.041
Time
20.4s
Tokens
4,608 tok

#78 gpt-oss-120b

medium
Cost
$0.001
Time
26.7s
Tokens
555 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
Gemini 3.5 Flash 6.5 10.0 50.0% 0 892ms 492 405 0
gpt-oss-120b 6.7 9.9 50.0% 0 10.21s 1,314 3,518 2,177
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 5.6 9.9 33.3% 0 2.75s 8,122 3,456 0
gpt-oss-120b 5.9 7.0 55.6% 1 38.37s 7,782 3,365 11,973
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 3.0 10.0 0.0% 0 3.56s 15,780 404 0
gpt-oss-120b 10.0 10.0 100.0% 0 31.18s 11,535 694 5,072
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.66s 7,548 279 0
gpt-oss-120b 6.4 5.9 66.7% 1 1.98s 7,476 241 1,114
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 899ms 633 12 0
gpt-oss-120b 2.9 4.4 22.2% 2 50.92s 1,266 6,784 20,606
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 922ms 486 117 0
gpt-oss-120b 4.3 10.0 0.0% 0 7.90s 659 107 387
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 6.4 5.8 66.7% 1 893ms 615 76 0
gpt-oss-120b 9.9 10.0 100.0% 0 7.63s 1,036 126 1,799
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.45s 558 282 0
gpt-oss-120b 5.3 7.2 44.4% 1 21.71s 1,190 1,790 2,264
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.79s 5,457 234 0
gpt-oss-120b 9.8 10.0 100.0% 0 6.91s 6,514 287 1,083
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 3.0 10.0 0.0% 0 1.76s 156 12 0
gpt-oss-120b 3.0 10.0 0.0% 0 26.51s 312 3,101 3,758

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