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OpenAI: GPT-5.5 vs OpenAI: GPT-5 Nano

Summary

GPT-5.5 vs GPT-5 Nano benchmark comparison: GPT-5.5 leads on average score with 9.3 vs 6.7. GPT-5 Nano has the lower benchmark cost at $0.081 vs $0.907. GPT-5.5 is faster at 9.76s vs 42.51s, with pass rates of 85.7% vs 57.1%.

Recommended model: GPT-5.5 - It has the best score here (9.3), while responding about 4.4x faster than GPT-5 Nano.

Last updated at: 2026-07-02

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07
Score 9.3 6.7
Rank #4 #82
Reliability 10.0 10.0
Consistency 10.0 7.3
Tests Correct
Attempt pass rate 85.7% 57.1%
Flaky tests 0 7
Total Runs 63 63
Cost per result 5.035 0.897
Total Cost $0.907 $0.081
Input Price $5.000 / 1M $0.050 / 1M
Output Price $30.000 / 1M $0.400 / 1M
Total Input Tokens 34,209 34,108
Output Tokens 2,046 5,464
Reasoning Tokens 22,460 192,064
Response Time (avg) 9.76s 42.51s
Response Time (max) 56.19s 204.02s
Response Time (total) 204.92s 595.09s

Generation showcase

Hamster playing table tennis

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

#4 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 tok

#82 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
GPT-5.5 10.0 10.0 100.0% 0 4.41s 606 238 1,020
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
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402
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
GPT-5.5 10.0 10.0 100.0% 0 9.56s 11,019 303 717
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
GPT-5.5 10.0 10.0 100.0% 0 3.28s 7,140 228 157
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
GPT-5.5 5.3 10.0 33.3% 0 28.05s 723 69 11,609
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
GPT-5.5 10.0 10.0 100.0% 0 5.17s 477 133 245
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
GPT-5.5 9.9 10.0 100.0% 0 3.74s 660 93 415
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
GPT-5.5 10.0 10.0 100.0% 0 4.74s 642 279 954
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
GPT-5.5 10.0 10.0 100.0% 0 4.96s 5,445 250 101
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
GPT-5.5 3.0 10.0 0.0% 0 10.06s 195 30 840
GPT-5 Nano 3.0 10.0 0.0% 0 20.13s 195 234 6,144

Quick Compare

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