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Google: Gemini 3.1 Pro Preview vs Google: Gemini 3.5 Flash

Last updated at: 2026-05-19

Metric Gemini 3.1 Pro Preview Gemini 3.1 Pro Preview medium Release: 2026-02-19 Gemini 3.5 Flash Gemini 3.5 Flash minimal Release: 2026-05-19
Score 9.6 8.1
Rank #3 #21
Reliability 10.0 10.0
Consistency 10.0 9.6
Tests Correct
Attempt pass rate 94.7% 75.4%
Flaky tests 0 1
Total Runs 57 57
Cost per result 3.300 0.494
Total Cost $0.594 $0.070
Input Price $2.000 / 1M $1.500 / 1M
Output Price $12.000 / 1M $9.000 / 1M
Output Tokens 1,944 2,262
Reasoning Tokens 41,839 0
Response Time (avg) 15.15s 1.37s
Response Time (max) 40.61s 3.56s
Response Time (total) 181.78s 26.04s

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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 7.90s 112 3,218
Gemini 3.5 Flash 6.5 10.0 50.0% 0 892ms 405 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 19.88s 405 4,201
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.28s 441 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 9.5 10.0 100.0% 0 40.61s 432 9,281
Gemini 3.5 Flash 3.0 10.0 0.0% 0 3.56s 404 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 7.72s 279 3,904
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.66s 279 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 7.7 10.0 66.7% 0 32.73s 18 12,424
Gemini 3.5 Flash 10.0 10.0 100.0% 0 899ms 12 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 11.77s 108 1,179
Gemini 3.5 Flash 10.0 10.0 100.0% 0 922ms 117 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 9.56s 72 2,236
Gemini 3.5 Flash 6.4 5.8 66.7% 1 893ms 76 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 7.15s 232 3,117
Gemini 3.5 Flash 10.0 10.0 100.0% 0 1.45s 282 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 23.15s 274 982
Gemini 3.5 Flash 10.0 10.0 100.0% 0 2.79s 234 0
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 6.27s 12 1,297
Gemini 3.5 Flash 3.0 10.0 0.0% 0 1.76s 12 0

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