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

The average score is effectively tied at 9.3 vs 9.4. GPT-5.6 Sol (medium) has the lower benchmark cost at $0.723 vs $1.257. GPT-5.5 (low) is faster at 10.15s vs 12.63s, with pass rates of 86.4% vs 90.9%.

Last updated at: 2026-08-20

Rank
#10
Total Output Tokens
28,540
Response Time (avg)
10.15s
Total Cost
$1.257
Rank
#8
Total Output Tokens
34,977
Response Time (avg)
12.63s
Total Cost
$0.723
Recommended model GPT-5.6 Sol (medium)

It has the best score here (9.4), while costing about 1.7x less than GPT-5.5 (low).

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 9.3 9.4
Rank #10 #8
Reliability 10.0 10.0
Consistency 10.0 8.9
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 86.4% 90.9%
Flaky tests 0 3
Total Runs 66 66
Cost per result 6.614 8.025
Total Cost $1.257 $0.723
Input Price $5.000 / 1M $2.500 / 1M
Output Price $30.000 / 1M $15.000 / 1M
Total Input Tokens 80,067 79,006
Output Tokens 5,378 4,696
Reasoning Tokens 23,162 30,281
Response Time (avg) 10.15s 12.63s
Response Time (max) 56.19s 79.40s
Response Time (total) 223.24s 277.88s
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.

#10 GPT-5.5

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

#8 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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