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Google: Gemini 2.5 Flash vs OpenAI: GPT-5 Nano

Last updated at: 2026-06-01

Metric Gemini 2.5 Flash Gemini 2.5 Flash none Release: 2025-06-17 GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07
Score 6.4 6.1
Rank #95 #100
Reliability 10.0 10.0
Consistency 9.6 7.1
Tests Correct
Attempt pass rate 48.3% 55.0%
Flaky tests 1 7
Total Runs 60 60
Cost per result 0.159 0.952
Total Cost $0.015 $0.077
Input Price $0.300 / 1M $0.050 / 1M
Output Price $2.500 / 1M $0.400 / 1M
Output Tokens 1,764 5,328
Reasoning Tokens 0 181,056
Response Time (avg) 889ms 43.52s
Response Time (max) 4.39s 204.02s
Response Time (total) 17.79s 565.82s

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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 2.5 Flash 3.0 10.0 0.0% 0 582ms 102 0
GPT-5 Nano 6.5 7.9 58.3% 1 25.50s 1,221 21,184
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 6.8 10.0 50.0% 0 810ms 477 0
GPT-5 Nano 5.4 6.6 33.3% 1 47.80s 604 30,144
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 3.0 10.0 0.0% 0 4.39s 366 0
GPT-5 Nano 10.0 10.0 100.0% 0 65.96s 578 17,984
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 10.0 10.0 100.0% 0 652ms 279 0
GPT-5 Nano 3.7 1.7 50.0% 2 21.42s 453 10,560
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 5.9 7.2 55.6% 1 495ms 12 0
GPT-5 Nano 5.2 4.4 55.6% 2 204.02s 237 64,448
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 5.0 10.0 0.0% 0 615ms 78 0
GPT-5 Nano 4.1 10.0 0.0% 0 17.51s 202 4,608
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 10.0 10.0 100.0% 0 590ms 72 0
GPT-5 Nano 9.8 10.0 100.0% 0 15.64s 312 4,736
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 7.7 10.0 66.7% 0 604ms 132 0
GPT-5 Nano 5.3 7.2 44.4% 1 20.63s 929 14,272
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 10.0 10.0 100.0% 0 1.91s 234 0
GPT-5 Nano 10.0 10.0 100.0% 0 33.30s 558 6,976
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 3.0 10.0 0.0% 0 1.15s 12 0
GPT-5 Nano 3.0 10.0 0.0% 0 20.13s 234 6,144

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