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GPT-5.5 vs GPT-5.6 Sol

The average score is effectively tied at 7.0 vs 7.0. GPT-5.6 Sol has the lower benchmark cost at $0.201 vs $0.544. GPT-5.6 Sol is faster at 2.17s vs 2.35s, with pass rates of 59.1% vs 63.6%.

Last updated at: 2026-09-04

Rank
#135
Total Output Tokens
4,915
Response Time (avg)
2.35s
Total Cost
$0.544
Rank
#132
Total Output Tokens
4,357
Response Time (avg)
2.17s
Total Cost
$0.201
Recommended model GPT-5.6 Sol

It has the best score here (7.0), while costing about 2.7x less than GPT-5.5.

Detailed comparison

Metric GPT-5.5 GPT-5.5 none Release: 2026-04-24 GPT-5.6 Sol GPT-5.6 Sol none Release: 2026-07-09
Score 7.0 7.0
Rank #135 #132
Reliability 10.0 10.0
Consistency 9.2 9.0
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 59.1% 63.6%
Flaky tests 2 3
Total Runs 66 66
Cost per result 4.533 4.365
Total Cost $0.544 $0.201
Input Price $5.000 / 1M $2.000 / 1M
Output Price $30.000 / 1M $10.000 / 1M
Total Input Tokens 79,294 78,602
Output Tokens 4,915 4,357
Reasoning Tokens 0 0
Response Time (avg) 2.35s 2.17s
Response Time (max) 12.24s 12.81s
Response Time (total) 51.78s 47.66s
Parameters ~1.5T total (~100B active) ~2T total (~150B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#135 GPT-5.5

none
Cost
$0.090
Time
54.3s
Tokens
3,063 tok

#132 GPT-5.6 Sol

none
Cost
$0.116
Time
78.7s
Tokens
3,944 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 5.5 10.0 33.3% 0 1.35s 7,305 462 0
GPT-5.6 Sol 5.5 10.0 33.3% 0 1.39s 7,302 390 0

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