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Gemini 3.1 Pro Preview (medium) vs Gemini 3.5 Flash (high)

Gemini 3.5 Flash (high) leads on average score with 9.4 vs 9.2. Gemini 3.1 Pro Preview (medium) has the lower benchmark cost at $1.352 vs $2.011. Gemini 3.5 Flash (high) is faster at 15.46s vs 20.62s, with pass rates of 90.9% vs 89.4%.

Last updated at: 2026-08-20

Rank
#12
Total Output Tokens
97,238
Response Time (avg)
20.62s
Total Cost
$1.352
Rank
#6
Total Output Tokens
205,482
Response Time (avg)
15.46s
Total Cost
$2.011
Recommended model Gemini 3.5 Flash (high)

It has the strongest score in this comparison (9.4) and the best overall balance of cost and response time across all 2 models.

Detailed comparison

Metric Gemini 3.1 Pro Preview Gemini 3.1 Pro Preview medium Release: 2026-02-19 Gemini 3.5 Flash Gemini 3.5 Flash high Release: 2026-05-19
Score 9.2 9.4
Rank #12 #6
Reliability 10.0 10.0
Consistency 10.0 9.3
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 90.9% 89.4%
Flaky tests 0 2
Total Runs 66 66
Cost per result 6.758 10.580
Total Cost $1.352 $2.011
Input Price $2.000 / 1M $1.500 / 1M
Output Price $12.000 / 1M $9.000 / 1M
Total Input Tokens 92,296 107,146
Output Tokens 5,232 8,777
Reasoning Tokens 92,006 196,705
Response Time (avg) 20.62s 15.46s
Response Time (max) 88.68s 145.92s
Response Time (total) 329.94s 340.20s
Parameters ~1.2T total (~20B active) ~500B total (~20B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#12 Gemini 3.1 Pro Preview

medium
Cost
$0.115
Time
87.2s
Tokens
9,629 tok

#6 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 3.1 Pro Preview 7.9 9.9 66.7% 0 40.17s 8,124 435 41,247
Gemini 3.5 Flash 10.0 10.0 100.0% 0 22.96s 8,118 456 47,129

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