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GPT-5.6 Sol vs GPT-6 Luna (low)

The average score is effectively tied at 7.0 vs 7.0. GPT-6 Luna (low) has the lower benchmark cost at $0.020 vs $0.201. GPT-5.6 Sol is faster at 2.17s vs 21.96s, with pass rates of 63.6% vs 62.1%.

Last updated at: 2026-09-23

Compared models

Rank
#158
Total Output Tokens
4,357
Response Time (avg)
2.17s
Total Cost
$0.201
Rank
#159
Total Output Tokens
22,605
Response Time (avg)
21.96s
Total Cost
$0.020
Recommended model GPT-6 Luna (low)

It has the best score here (7.0), while costing about 10.4x less than GPT-5.6 Sol.

Detailed comparison

Metric GPT-5.6 Sol GPT-5.6 Sol none Release: 2026-07-09 GPT-6 Luna GPT-6 Luna low Release: 2026-09-23
Score 7.0 7.0
Rank #158 #159
Reliability 10.0 9.6
Consistency 9.0 8.5
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 63.6% 62.1%
Flaky tests 3 4
Total Runs 66 66
Cost per result 4.365 0.176
Total Cost $0.201 $0.020
Input Price $2.000 / 1M $0.100 / 1M
Output Price $10.000 / 1M $0.500 / 1M
Total Input Tokens 78,602 80,159
Output Tokens 4,357 4,623
Reasoning Tokens 0 17,982
Response Time (avg) 2.17s 21.96s
Response Time (max) 12.81s 89.37s
Response Time (total) 47.66s 483.19s
Parameters ~2T total (~150B active) ~400B total (~17B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#158 GPT-5.6 Sol

none
Cost
$0.116
Time
78.7s
Tokens
3,944 tok

#159 GPT-6 Luna

low
Cost
$0.002
Time
19.2s
Tokens
2,598 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 5.5 10.0 33.3% 0 1.39s 7,302 390 0
GPT-6 Luna 6.0 7.2 55.6% 1 15.39s 7,302 493 6,655

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