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Google: Gemini 3.5 Flash vs OpenAI: GPT-5.5

Summary

Gemini 3.5 Flash vs GPT-5.5 benchmark comparison: Gemini 3.5 Flash leads on average score with 6.8 vs 6.3. Gemini 3.5 Flash has the lower benchmark cost at $0.108 vs $0.231. Gemini 3.5 Flash is faster at 1.57s vs 1.89s, with pass rates of 68.3% vs 54.0%.

Recommended model: Gemini 3.5 Flash - It has the best score here (6.8), while costing about 2.1x less than GPT-5.5.

Last updated at: 2026-06-18

Metric Gemini 3.5 Flash Gemini 3.5 Flash minimal Release: 2026-05-19 GPT-5.5 GPT-5.5 none Release: 2026-04-24
Score 6.8 6.3
Rank #71 #90
Reliability 10.0 10.0
Consistency 9.6 8.8
Tests Correct
Attempt pass rate 68.3% 54.0%
Flaky tests 1 3
Total Runs 63 63
Cost per result 0.767 2.302
Total Cost $0.108 $0.231
Input Price $1.500 / 1M $5.000 / 1M
Output Price $9.000 / 1M $30.000 / 1M
Total Input Tokens 39,847 34,212
Output Tokens 5,277 1,971
Reasoning Tokens 0 0
Response Time (avg) 1.57s 1.89s
Response Time (max) 5.51s 5.56s
Response Time (total) 33.02s 39.64s

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

#90 GPT-5.5

none
Cost
$0.090
Time
54.3s
Tokens
3,063 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-5.5 6.9 7.9 66.7% 1 1.31s 606 213 0
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-5.5 5.5 10.0 33.3% 0 1.35s 7,305 462 0
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-5.5 3.0 10.0 0.0% 0 5.56s 11,019 300 0
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-5.5 10.0 10.0 100.0% 0 1.18s 7,140 222 0
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-5.5 2.9 7.2 11.1% 1 1.31s 723 52 0
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-5.5 10.0 10.0 100.0% 0 3.41s 477 124 0
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-5.5 6.2 5.8 66.7% 1 1.15s 660 81 0
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-5.5 7.7 10.0 66.7% 0 1.29s 642 252 0
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-5.5 10.0 10.0 100.0% 0 3.90s 5,445 247 0
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-5.5 3.0 10.0 0.0% 0 5.01s 195 18 0

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