Navigate
Advertise here

GPT-5.6 Luna (high) vs GPT-6 Luna (medium)

GPT-6 Luna (medium) leads on average score with 8.3 vs 8.0. GPT-6 Luna (medium) has the lower benchmark cost at $0.047 vs $0.118. GPT-6 Luna (medium) is faster at 18.07s vs 18.39s, with pass rates of 71.0% vs 73.9%.

Last updated at: 2026-10-07

Compared models

Rank
#96
Total Output Tokens
139,395
Response Time (avg)
18.39s
Total Cost
$0.118
Rank
#83
Total Output Tokens
53,161
Response Time (avg)
18.07s
Total Cost
$0.047
Recommended model GPT-6 Luna (medium)

It has the best score here (8.3), while costing about 2.5x less than GPT-5.6 Luna (high).

Detailed comparison

Metric GPT-5.6 Luna GPT-5.6 Luna high Release: 2026-07-09 GPT-6 Luna GPT-6 Luna medium Release: 2026-09-23
Score 8.0 8.3
Rank #96 #83
Reliability 10.0 10.0
Consistency 8.6 8.9
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 71.0% 73.9%
Flaky tests 4 3
Total Runs 69 69
Cost per result 5.882 0.313
Total Cost $0.118 $0.047
Input Price $0.200 / 1M $0.100 / 1M
Output Price $1.200 / 1M $0.500 / 1M
Cache Read Price $0.020 / 1M $0.010 / 1M
Cache Write Price $0.250 / 1M $0.125 / 1M
Total Input Tokens 197,896 203,193
Output Tokens 6,211 5,751
Reasoning Tokens 133,184 47,410
Response Time (avg) 18.39s 18.07s
Response Time (max) 111.09s 66.44s
Response Time (total) 422.93s 415.53s
Parameters ~400B total (~17B active) ~400B total (~17B 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.

#96 GPT-5.6 Luna

high
Cost
$0.033
Time
34.2s
Tokens
5,484 tok

#83 GPT-6 Luna

medium
Cost
$0.002
Time
23.6s
Tokens
2,966 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 Luna 5.5 4.7 55.6% 2 15.63s 7,302 510 17,746
GPT-6 Luna 6.6 4.6 77.8% 2 23.63s 7,302 438 10,222

Switch Comparison Pair