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Google: Gemini 3.1 Pro Preview vs Google: Gemini 3 Flash Preview

Last updated at: 2026-05-29

Metric Gemini 3.1 Pro Preview Gemini 3.1 Pro Preview medium Release: 2026-02-19 Gemini 3 Flash Preview Gemini 3 Flash Preview low Release: 2025-12-17
Score 9.3 8.6
Rank #4 #13
Reliability 10.0 10.0
Consistency 10.0 9.6
Tests Correct
Attempt pass rate 90.0% 81.7%
Flaky tests 0 1
Total Runs 60 60
Cost per result 5.587 0.658
Total Cost $1.006 $0.106
Input Price $2.000 / 1M $0.500 / 1M
Output Price $12.000 / 1M $3.000 / 1M
Output Tokens 1,971 2,070
Reasoning Tokens 75,384 27,348
Response Time (avg) 20.77s 5.81s
Response Time (max) 88.68s 14.72s
Response Time (total) 269.96s 116.25s

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Score vs Total Cost

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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 Flash Preview 10.0 10.0 100.0% 0 3.48s 281 3,082
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 7.0 9.8 50.0% 0 54.28s 429 37,735
Gemini 3 Flash Preview 7.3 10.0 50.0% 0 6.66s 450 6,251
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 Flash Preview 3.0 10.0 0.0% 0 3.27s 326 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 Flash Preview 10.0 10.0 100.0% 0 9.40s 279 3,656
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 Flash Preview 5.3 7.2 44.4% 1 8.05s 12 6,410
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 Flash Preview 10.0 10.0 100.0% 0 3.68s 120 981
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 Flash Preview 9.9 10.0 100.0% 0 7.02s 71 2,752
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 6.90s 235 3,128
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.77s 288 3,168
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 Flash Preview 10.0 10.0 100.0% 0 4.99s 234 415
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 Flash Preview 10.0 10.0 100.0% 0 2.75s 9 633

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