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

Summary

GPT-5.6 Sol (low) leads on average score with 9.5 vs 9.0. GPT-5.6 Sol (low) has the lower benchmark cost at $0.971 vs $4.137. GPT-5.6 Sol (low) is faster at 8.79s vs 38.42s, with pass rates of 87.9% vs 86.4%.

Recommended modelGPT-5.6 Sol (low)It has the best score here (9.5), while costing about 4.3x less than GPT-5.5 (medium).

Last updated at: 2026-07-17

Metric GPT-5.5 GPT-5.5 medium Release: 2026-04-24 GPT-5.6 Sol GPT-5.6 Sol low Release: 2026-07-09
Score 9.0 9.5
Rank #10 #3
Reliability 10.0 10.0
Consistency 8.9 9.2
Tests Correct
Attempt pass rate 87.9% 86.4%
Flaky tests 3 2
Total Runs 66 66
Cost per result 22.980 5.391
Total Cost $4.137 $0.971
Input Price $5.000 / 1M $5.000 / 1M
Output Price $30.000 / 1M $30.000 / 1M
Total Input Tokens 80,659 78,571
Output Tokens 5,617 4,476
Reasoning Tokens 118,819 14,770
Response Time (avg) 38.42s 8.79s
Response Time (max) 332.10s 53.91s
Response Time (total) 845.35s 193.33s

Generation showcase

Hamster playing table tennis

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

#10 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 tok

#3 GPT-5.6 Sol

low
Cost
$0.062
Time
26.7s
Tokens
2,150 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 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959
GPT-5.6 Sol 10.0 10.0 100.0% 0 11.25s 7,302 412 3,482

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