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Gemini 3.5 Flash vs GPT-5.5 (medium)

GPT-5.5 (medium) leads on average score with 9.0 vs 7.0. Gemini 3.5 Flash has the lower benchmark cost at $1.079 vs $4.137. Gemini 3.5 Flash is faster at 9.93s vs 38.42s, with pass rates of 74.2% vs 87.9%.

Last updated at: 2026-07-28

Rank
#89
Total Output Tokens
117,518
Response Time (avg)
9.93s
Total Cost
$1.079
Rank
#15
Total Output Tokens
124,436
Response Time (avg)
38.42s
Total Cost
$4.137
Recommended model GPT-5.5 (medium)

It has the strongest score in this comparison (9.0) and the best overall balance of cost and response time across all 2 models.

Detailed comparison

Metric Gemini 3.5 Flash Gemini 3.5 Flash none Release: 2026-05-19 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 7.0 9.0
Rank #89 #15
Reliability 10.0 10.0
Consistency 8.9 8.9
Tests Correct
Attempt pass rate 74.2% 87.9%
Flaky tests 3 3
Total Runs 66 66
Cost per result 7.190 22.980
Total Cost $1.079 $4.137
Input Price $1.500 / 1M $5.000 / 1M
Output Price $9.000 / 1M $30.000 / 1M
Total Input Tokens 13,843 80,659
Output Tokens 117,518 5,617
Reasoning Tokens 0 118,819
Response Time (avg) 9.93s 38.42s
Response Time (max) 64.36s 332.10s
Response Time (total) 178.68s 845.35s

Model generation showcase

Hamster playing table tennis

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

#89 Gemini 3.5 Flash

none
Cost
$0.225
Time
125.5s
Tokens
25,004 tok

#15 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 8.8 7.8 88.9% 1 34.69s 8,122 75,927 0
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959

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