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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 low Release: 2026-05-19
Score 9.6 9.6
Rank #3 #2
Reliability 10.0 10.0
Consistency 10.0 10.0
Tests Correct
Attempt pass rate 94.7% 94.7%
Flaky tests 0 0
Total Runs 57 57
Cost per result 3.300 1.359
Total Cost $0.594 $0.245
Input Price $2.000 / 1M $1.500 / 1M
Output Price $12.000 / 1M $9.000 / 1M
Output Tokens 1,944 2,003
Reasoning Tokens 41,839 20,245
Response Time (avg) 15.15s 2.84s
Response Time (max) 40.61s 6.44s
Response Time (total) 181.78s 54.00s

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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 2.52s 209 2,536
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 5.49s 428 3,146
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 10.0 10.0 100.0% 0 6.44s 351 3,050
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 1.81s 279 1,164
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 7.7 10.0 66.7% 0 3.39s 12 4,538
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 2.27s 119 916
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 9.9 10.0 100.0% 0 1.86s 71 1,652
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 2.35s 288 2,150
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 3.27s 234 403
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 10.0 10.0 100.0% 0 1.88s 12 690

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