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Compared models

GPT-5.6 Sol (medium) vs GPT-5.6 Terra (medium) vs GPT-5.6 Luna (medium) vs GPT-5.5 (medium) benchmark comparison: GPT-5.6 Sol (medium) leads on Score with 9.4. GPT-5.6 Sol (medium) leads on Reliability with 10.0. GPT-5.6 Luna (medium) has the lowest Total Cost at $0.072. GPT-5.6 Terra (medium) is fastest at 6.85s.

Last updated at: 2026-08-20

Rank
#8
Total Output Tokens
34,977
Response Time (avg)
12.63s
Total Cost
$0.723
Rank
#66
Total Output Tokens
30,349
Response Time (avg)
6.85s
Total Cost
$0.523
Rank
#93
Total Output Tokens
44,525
Response Time (avg)
7.43s
Total Cost
$0.072
Rank
#19
Total Output Tokens
125,316
Response Time (avg)
38.97s
Total Cost
$4.163
Recommended model GPT-5.6 Sol (medium)

It has the best score here (9.4), while costing about 2.2x less than the other models in this comparison.

Detailed comparison

Metric GPT-5.6 Sol GPT-5.6 Sol medium Release: 2026-07-09 GPT-5.6 Terra GPT-5.6 Terra medium Release: 2026-07-09 GPT-5.6 Luna GPT-5.6 Luna medium Release: 2026-07-09 GPT-5.5 GPT-5.5 medium Release: 2026-04-24
Score 9.4 7.8 7.4 9.0
Rank #8 #66 #93 #19
Reliability 10.0 10.0 10.0 10.0
Consistency 8.9 9.3 9.2 8.9
Attempts 66/66 66/66 66/66 66/66
Tests Correct
Attempt pass rate 90.9% 69.7% 62.1% 87.9%
Flaky tests 3 2 2 3
Total Runs 66 66 66 66
Cost per result 8.025 4.603 2.601 23.127
Total Cost $0.723 $0.523 $0.072 $4.163
Input Price $2.500 / 1M $2.000 / 1M $0.200 / 1M $5.000 / 1M
Output Price $15.000 / 1M $12.000 / 1M $1.200 / 1M $30.000 / 1M
Total Input Tokens 79,006 79,184 89,685 80,668
Output Tokens 4,696 4,878 5,701 5,617
Reasoning Tokens 30,281 25,471 38,824 119,699
Response Time (avg) 12.63s 6.85s 7.43s 38.97s
Response Time (max) 79.40s 41.68s 29.85s 332.10s
Response Time (total) 277.88s 150.65s 163.54s 857.43s
Parameters ~2T total (~150B active) ~1T total (~60B active) ~400B total (~17B active) ~1.5T total (~100B active)
Availability Closed Closed Closed Closed

Model generation showcase

Hamster playing table tennis

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

#8 GPT-5.6 Sol

medium
Cost
$0.124
Time
57.2s
Tokens
4,199 tok

#66 GPT-5.6 Terra

medium
Cost
$0.035
Time
16.3s
Tokens
2,418 tok

#93 GPT-5.6 Luna

medium
Cost
$0.014
Time
14.6s
Tokens
2,362 tok

#19 GPT-5.5

medium
Cost
$0.112
Time
71.9s
Tokens
3,807 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-5.6 Sol 10.0 10.0 100.0% 0 9.40s 7,302 394 4,706
GPT-5.6 Terra 6.1 7.2 55.6% 1 7.19s 7,302 427 4,527
GPT-5.6 Luna 5.4 7.2 44.4% 1 10.38s 7,302 564 9,928
GPT-5.5 8.8 7.8 88.9% 1 59.77s 7,305 362 24,959

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