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

Last updated at: 2026-04-16

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 6.2 6.3
Rank #61 #56
Consistency 9.2 6.5
Tests Correct
Attempt pass rate 44.4% 59.3%
Flaky tests 2 8
Total Runs 54 54
Cost per result 0.184 0.942
Total Cost $0.013 $0.066
Input Price $0.300 / 1M $0.050 / 1M
Output Price $2.500 / 1M $0.400 / 1M
Output Tokens 1,726 4,980
Reasoning Tokens 0 156,288
Response Time (avg) 903ms 44.13s
Response Time (max) 4.39s 204.02s
Response Time (total) 16.26s 485.47s

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Score vs Response Time (avg)

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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 10.0 10.0 100.0% 0 1.16s 453 0
GPT-5 Nano 6.7 3.5 66.7% 1 40.73s 480 12,992
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 8.0 6.8 66.7% 1 672ms 70 0
GPT-5 Nano 8.5 6.8 83.3% 1 11.90s 382 4,096
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Gemini 2.5 Flash 5.7 10.0 33.3% 0 576ms 132 0
GPT-5 Nano 5.3 7.2 44.4% 1 19.81s 869 13,440
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

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