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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 none Release: 2026-05-19
Score 9.6 9.1
Rank #3 #6
Reliability 10.0 10.0
Consistency 10.0 9.0
Tests Correct
Attempt pass rate 94.7% 91.7%
Flaky tests 0 2
Total Runs 57 57
Cost per result 3.300 3.490
Total Cost $0.594 $0.489
Input Price $2.000 / 1M $1.500 / 1M
Output Price $12.000 / 1M $9.000 / 1M
Output Tokens 1,944 53,202
Reasoning Tokens 41,839 0
Response Time (avg) 15.15s 5.59s
Response Time (max) 40.61s 14.88s
Response Time (total) 181.78s 89.50s

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 10.0 10.0 100.0% 0 2.53s 5,101 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 14.88s 11,611 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 0.0 0.0 0.0% 0 0ms 0 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 8.10s 5,895 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 7.6 7.2 77.8% 1 10.64s 17,910 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 3.46s 1,620 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 9.8 10.0 100.0% 0 3.38s 3,928 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 3.13s 4,640 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 0.0 0.0 0.0% 0 0ms 0 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 2.8 1.6 33.3% 1 4.87s 2,497 0

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