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Google: Gemini 2.5 Flash vs Google: Gemini 3.5 Flash

Gemini 3.5 Flash (high) leads on average score with 9.5 vs 6.2. Gemini 2.5 Flash has the lower benchmark cost at $0.017 vs $1.976. Gemini 2.5 Flash is faster at 6.20s vs 15.07s, with pass rates of 43.9% vs 93.9%.

Recommended modelGemini 3.5 Flash (high)It has the strongest score in this comparison (9.5) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-17

Metric Gemini 2.5 Flash Gemini 2.5 Flash none Release: 2025-06-17 Gemini 3.5 Flash Gemini 3.5 Flash high Release: 2026-05-19
Score 6.2 9.5
Rank #112 #2
Reliability 10.0 10.0
Consistency 9.6 9.3
Tests Correct
Attempt pass rate 43.9% 93.9%
Flaky tests 1 2
Total Runs 66 66
Cost per result 0.186 9.879
Total Cost $0.017 $1.976
Input Price $0.300 / 1M $1.500 / 1M
Output Price $2.500 / 1M $9.000 / 1M
Total Input Tokens 39,877 107,137
Output Tokens 1,890 8,777
Reasoning Tokens 0 192,900
Response Time (avg) 6.20s 15.07s
Response Time (max) 118.00s 145.92s
Response Time (total) 136.37s 331.48s

Hamster playing table tennis

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

#112 Gemini 2.5 Flash

none
Invalid SVG
Cost
$0.164
Time
215.5s
Tokens
65,659 tok

#2 Gemini 3.5 Flash

high
Cost
$0.208
Time
118.2s
Tokens
23,158 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 2.5 Flash 5.5 10.0 33.3% 0 736ms 8,122 483 0
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.96s 8,118 456 47,129

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