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GPT-5.5 (low) vs GPT-5.6 Sol (medium)

The average score is effectively tied at 9.5 vs 9.5. GPT-5.6 Sol (medium) has the lower benchmark cost at $1.700 vs $1.822. GPT-5.5 (low) is faster at 11.91s vs 14.57s, with pass rates of 87.0% vs 91.3%.

Last updated at: 2026-10-07

Compared models

Rank
#22
Total Output Tokens
31,065
Response Time (avg)
11.91s
Total Cost
$1.822
Rank
#19
Total Output Tokens
38,005
Response Time (avg)
14.57s
Total Cost
$1.700
Recommended model GPT-5.5 (low)

It has the strongest score in this comparison (9.5) and the best overall balance of cost and response time across 2 models.

Detailed comparison

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 GPT-5.6 Sol GPT-5.6 Sol medium Release: 2026-07-09
Score 9.5 9.5
Rank #22 #19
Reliability 10.0 10.0
Consistency 10.0 8.9
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 87.0% 91.3%
Flaky tests 0 3
Total Runs 69 69
Cost per result 9.109 8.944
Total Cost $1.822 $1.700
Input Price $5.000 / 1M $2.000 / 1M
Output Price $30.000 / 1M $10.000 / 1M
Cache Read Price $0.500 / 1M $0.200 / 1M
Cache Write Price N/A $2.500 / 1M
Total Input Tokens 177,939 191,341
Output Tokens 6,283 5,665
Reasoning Tokens 24,782 32,340
Response Time (avg) 11.91s 14.57s
Response Time (max) 56.19s 79.40s
Response Time (total) 273.82s 335.16s
Parameters ~1.5T total (~100B active) ~2T total (~150B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#22 GPT-5.5

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

#19 GPT-5.6 Sol

medium
Cost
$0.124
Time
57.2s
Tokens
4,199 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 9.40s 7,302 394 4,706

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