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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 8.2. Gemini 2.5 Flash (medium) has the lower benchmark cost at $0.643 vs $1.976. Gemini 3.5 Flash (high) is faster at 15.07s vs 21.18s, with pass rates of 71.2% 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 medium Release: 2025-06-17 Gemini 3.5 Flash Gemini 3.5 Flash high Release: 2026-05-19
Score 8.2 9.5
Rank #25 #2
Reliability 10.0 10.0
Consistency 9.6 9.3
Tests Correct
Attempt pass rate 71.2% 93.9%
Flaky tests 1 2
Total Runs 66 66
Cost per result 4.286 9.879
Total Cost $0.643 $1.976
Input Price $0.300 / 1M $1.500 / 1M
Output Price $2.500 / 1M $9.000 / 1M
Total Input Tokens 132,498 107,137
Output Tokens 12,739 8,777
Reasoning Tokens 228,464 192,900
Response Time (avg) 21.18s 15.07s
Response Time (max) 140.50s 145.92s
Response Time (total) 465.89s 331.48s

Hamster playing table tennis

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

#25 Gemini 2.5 Flash

medium
Invalid SVG
Cost
$0.000
Time
274.0s
Tokens
0 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 7.8 10.0 66.7% 0 41.01s 6,669 543 32,303
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.96s 8,118 456 47,129

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