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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 9.8 vs 9.0. Gemini 3.5 Flash has the lower benchmark cost at $1.115 vs $3.679. Gemini 3.5 Flash is faster at 8.84s vs 37.98s, with pass rates of 96.8% vs 87.3%.

Recommended model: Gemini 3.5 Flash - It has the best score here (9.8), while costing about 3.3x less than GPT-5.5.

Last updated at: 2026-07-02

Metric Gemini 3.5 Flash Gemini 3.5 Flash high Release: 2026-05-19 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 9.8 9.0
Rank #1 #9
Reliability 10.0 10.0
Consistency 9.6 8.9
Tests Correct
Attempt pass rate 96.8% 87.3%
Flaky tests 1 3
Total Runs 63 63
Cost per result 5.575 21.638
Total Cost $1.115 $3.679
Input Price $1.500 / 1M $5.000 / 1M
Output Price $9.000 / 1M $30.000 / 1M
Total Input Tokens 37,594 34,212
Output Tokens 1,975 1,985
Reasoning Tokens 115,638 114,925
Response Time (avg) 8.84s 37.98s
Response Time (max) 34.82s 332.10s
Response Time (total) 185.57s 797.60s

Generation showcase

Hamster playing table tennis

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

#1 Gemini 3.5 Flash

high
Cost
$0.208
Time
118.2s
Tokens
23,158 tok

#9 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 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 10.0 10.0 100.0% 0 2.57s 492 174 4,997
GPT-5.5 10.0 10.0 100.0% 0 4.66s 606 250 1,335
Coding 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 22.96s 8,118 456 47,129
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959
Combined 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 22.37s 12,873 351 16,323
GPT-5.5 10.0 10.0 100.0% 0 19.29s 11,019 312 2,841
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 6.43s 7,548 279 8,466
GPT-5.5 10.0 10.0 100.0% 0 4.18s 7,140 234 593
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 7.6 7.2 77.8% 1 14.09s 633 12 24,721
GPT-5.5 5.3 7.2 44.4% 1 164.14s 723 67 79,625
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 3.63s 486 115 1,650
GPT-5.5 10.0 10.0 100.0% 0 4.16s 477 138 223
Instructions following 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 3.35s 615 70 3,799
GPT-5.5 10.0 10.0 100.0% 0 3.36s 660 93 538
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 3.23s 558 241 4,940
GPT-5.5 10.0 10.0 100.0% 0 6.76s 642 241 2,225
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 9.8 10.0 100.0% 0 4.96s 6,115 265 1,608
GPT-5.5 10.0 10.0 100.0% 0 10.57s 5,445 258 832
Trivia 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 3.94s 156 12 2,005
GPT-5.5 2.8 1.6 33.3% 1 37.86s 195 30 1,754

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