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Google: Gemini 3 Flash Preview vs OpenAI: GPT-5 Nano

Summary

Gemini 3 Flash Preview vs GPT-5 Nano benchmark comparison: Gemini 3 Flash Preview leads on average score with 6.9 vs 6.7. Gemini 3 Flash Preview has the lower benchmark cost at $0.025 vs $0.081. Gemini 3 Flash Preview is faster at 1.65s vs 42.51s, with pass rates of 66.7% vs 57.1%.

Recommended model: Gemini 3 Flash Preview - It has the best score here (6.9), while costing about 3.3x less than GPT-5 Nano.

Last updated at: 2026-06-12

Metric Gemini 3 Flash Preview Gemini 3 Flash Preview none Release: 2025-12-17 GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07
Score 6.9 6.7
Rank #68 #79
Reliability 10.0 10.0
Consistency 9.2 7.3
Tests Correct
Attempt pass rate 66.7% 57.1%
Flaky tests 2 7
Total Runs 63 63
Cost per result 0.186 0.897
Total Cost $0.025 $0.081
Input Price $0.500 / 1M $0.050 / 1M
Output Price $3.000 / 1M $0.400 / 1M
Total Input Tokens 37,011 34,108
Output Tokens 1,885 5,464
Reasoning Tokens 0 192,064
Response Time (avg) 1.65s 42.51s
Response Time (max) 3.56s 204.02s
Response Time (total) 23.07s 595.09s

Generation showcase

Hamster playing table tennis

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

#68 Gemini 3 Flash Preview

none
Cost
$0.003
Time
5.6s
Tokens
981 tok

#79 GPT-5 Nano

medium
Cost
$0.006
Time
108.5s
Tokens
13,209 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 Flash Preview 8.3 10.0 75.0% 0 1.25s 498 214 0
GPT-5 Nano 6.5 7.9 58.3% 1 25.50s 606 1,221 21,184
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 5.5 10.0 33.3% 0 1.80s 8,122 453 0
GPT-5 Nano 7.0 7.7 55.6% 1 41.62s 7,305 740 41,152
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 4.7 1.6 66.7% 1 3.56s 12,862 350 0
GPT-5 Nano 10.0 10.0 100.0% 0 65.96s 11,019 578 17,984
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 1.41s 7,263 279 0
GPT-5 Nano 3.7 1.7 50.0% 2 21.42s 7,140 453 10,560
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 7.7 10.0 66.7% 0 963ms 643 18 0
GPT-5 Nano 5.2 4.4 55.6% 2 204.02s 619 237 64,448
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 1.13s 490 104 0
GPT-5 Nano 4.1 10.0 0.0% 0 17.51s 477 202 4,608
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 6.4 5.8 66.7% 1 1.58s 619 74 0
GPT-5 Nano 9.8 10.0 100.0% 0 15.64s 660 312 4,736
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 7.7 10.0 66.7% 0 1.05s 574 144 0
GPT-5 Nano 5.3 7.2 44.4% 1 20.63s 642 929 14,272
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 10.0 10.0 100.0% 0 3.35s 5,784 234 0
GPT-5 Nano 10.0 10.0 100.0% 0 33.30s 5,445 558 6,976
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 3 Flash Preview 3.0 10.0 0.0% 0 1.07s 156 15 0
GPT-5 Nano 3.0 10.0 0.0% 0 20.13s 195 234 6,144

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