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

Summary

Gemini 3.1 Pro Preview vs Gemini 3 Flash Preview benchmark comparison: Gemini 3.1 Pro Preview leads on average score with 9.2 vs 7.4. Gemini 3 Flash Preview has the lower benchmark cost at $0.111 vs $1.054. Gemini 3 Flash Preview is faster at 5.76s vs 20.14s, with pass rates of 90.5% vs 79.4%.

Recommended model: Gemini 3 Flash Preview - It offers the best overall trade-off: a competitive score (7.4), lower cost than Gemini 3.1 Pro Preview, and balanced response time.

Last updated at: 2026-06-12

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 9.2 7.4
Rank #10 #53
Reliability 10.0 10.0
Consistency 10.0 9.2
Tests Correct
Attempt pass rate 90.5% 79.4%
Flaky tests 0 2
Total Runs 63 63
Cost per result 5.546 0.689
Total Cost $1.054 $0.111
Input Price $2.000 / 1M $0.500 / 1M
Output Price $12.000 / 1M $3.000 / 1M
Total Input Tokens 41,617 36,769
Output Tokens 1,977 2,076
Reasoning Tokens 78,896 28,518
Response Time (avg) 20.14s 5.76s
Response Time (max) 88.68s 14.72s
Response Time (total) 281.92s 120.93s

Generation showcase

Hamster playing table tennis

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

#10 Gemini 3.1 Pro Preview

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

#53 Gemini 3 Flash Preview

low
Cost
$0.007
Time
12.1s
Tokens
2,289 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 7.90s 498 112 3,218
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 3.48s 500 281 3,082
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 Flash Preview 5.8 7.2 44.4% 1 6.00s 8,122 456 7,421
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 9.5 10.0 100.0% 0 40.61s 17,240 432 9,281
Gemini 3 Flash Preview 3.0 10.0 0.0% 0 3.27s 12,860 326 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 7.72s 7,265 279 3,904
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 9.40s 7,261 279 3,656
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 7.7 10.0 66.7% 0 32.73s 635 18 12,424
Gemini 3 Flash Preview 5.3 7.2 44.4% 1 8.05s 645 12 6,410
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 11.77s 490 108 1,179
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 3.68s 492 120 981
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 9.56s 621 72 2,236
Gemini 3 Flash Preview 9.9 10.0 100.0% 0 7.02s 621 71 2,752
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 6.90s 570 235 3,128
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 5.77s 562 288 3,168
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 23.15s 6,018 274 982
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 4.99s 5,550 234 415
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3.1 Pro Preview 10.0 10.0 100.0% 0 6.27s 156 12 1,297
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 2.75s 156 9 633

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