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OpenAI: GPT-5.5 vs OpenAI: GPT-5.6 Sol

Summary

The average score is effectively tied at 9.3 vs 9.4. GPT-5.6 Sol (high) has the lower benchmark cost at $0.821 vs $0.907. GPT-5.5 (low) is faster at 9.76s vs 10.56s, with pass rates of 85.7% vs 88.9%.

Recommended modelGPT-5.6 Sol (high)It has the strongest score in this comparison (9.4) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-14

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 GPT-5.6 Sol GPT-5.6 Sol high Release: 2026-07-09
Score 9.3 9.4
Rank #7 #6
Reliability 10.0 10.0
Consistency 10.0 8.8
Tests Correct
Attempt pass rate 85.7% 88.9%
Flaky tests 0 3
Total Runs 63 63
Cost per result 5.035 4.824
Total Cost $0.907 $0.821
Input Price $5.000 / 1M $5.000 / 1M
Output Price $30.000 / 1M $30.000 / 1M
Total Input Tokens 34,209 34,114
Output Tokens 2,046 1,872
Reasoning Tokens 22,460 19,777
Response Time (avg) 9.76s 10.56s
Response Time (max) 56.19s 54.79s
Response Time (total) 204.92s 221.69s

Generation showcase

Hamster playing table tennis

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

#7 GPT-5.5

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

#6 GPT-5.6 Sol

high
Cost
$0.151
Time
201.9s
Tokens
5,100 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
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402
GPT-5.6 Sol 10.0 10.0 100.0% 0 12.52s 7,302 404 5,656

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