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Google: Gemini 2.5 Flash vs OpenAI: GPT-5.5

GPT-5.5 (low) leads on average score with 9.3 vs 6.2. Gemini 2.5 Flash has the lower benchmark cost at $0.017 vs $1.253. Gemini 2.5 Flash is faster at 6.20s vs 10.13s, with pass rates of 43.9% vs 86.4%.

Recommended modelGPT-5.5 (low)It has the strongest score in this comparison (9.3) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-17

Metric Gemini 2.5 Flash Gemini 2.5 Flash none Release: 2025-06-17 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 6.2 9.3
Rank #112 #6
Reliability 10.0 10.0
Consistency 9.6 10.0
Tests Correct
Attempt pass rate 43.9% 86.4%
Flaky tests 1 0
Total Runs 66 66
Cost per result 0.186 6.594
Total Cost $0.017 $1.253
Input Price $0.300 / 1M $5.000 / 1M
Output Price $2.500 / 1M $30.000 / 1M
Total Input Tokens 39,877 80,058
Output Tokens 1,890 5,378
Reasoning Tokens 0 23,040
Response Time (avg) 6.20s 10.13s
Response Time (max) 118.00s 56.19s
Response Time (total) 136.37s 222.82s

Hamster playing table tennis

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

#112 Gemini 2.5 Flash

none
Invalid SVG
Cost
$0.164
Time
215.5s
Tokens
65,659 tok

#6 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 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

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Gemini 2.5 Flash 5.5 10.0 33.3% 0 736ms 8,122 483 0
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402

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