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Gemini 3.5 Flash (medium) vs GPT-5.5 (medium)

The average score is effectively tied at 9.0 vs 9.0. Gemini 3.5 Flash (medium) has the lower benchmark cost at $0.665 vs $4.163. Gemini 3.5 Flash (medium) is faster at 8.48s vs 38.97s, with pass rates of 83.3% vs 87.9%.

Last updated at: 2026-08-15

Rank
#18
Total Output Tokens
62,173
Response Time (avg)
8.48s
Total Cost
$0.665
Rank
#19
Total Output Tokens
125,316
Response Time (avg)
38.97s
Total Cost
$4.163
Recommended model Gemini 3.5 Flash (medium)

It has the best score here (9.0), while costing about 6.3x less than GPT-5.5 (medium).

Detailed comparison

Metric Gemini 3.5 Flash Gemini 3.5 Flash medium Release: 2026-05-19 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 9.0 9.0
Rank #18 #19
Reliability 10.0 10.0
Consistency 9.7 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 83.3% 87.9%
Flaky tests 1 3
Total Runs 66 66
Cost per result 3.690 23.127
Total Cost $0.665 $4.163
Input Price $1.500 / 1M $5.000 / 1M
Output Price $9.000 / 1M $30.000 / 1M
Total Input Tokens 69,756 80,668
Output Tokens 2,166 5,617
Reasoning Tokens 60,007 119,699
Response Time (avg) 8.48s 38.97s
Response Time (max) 76.68s 332.10s
Response Time (total) 186.57s 857.43s
Parameters ~500B total (~20B active) ~1.5T total (~100B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#18 Gemini 3.5 Flash

medium
Cost
$0.201
Time
112.9s
Tokens
22,371 tok

#19 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

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.5 Flash 7.9 7.5 77.8% 1 12.63s 8,118 461 24,939
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959

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