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GPT-5.6 Luna (low) vs Inkling (low)

The average score is effectively tied at 6.9 vs 6.8. GPT-5.6 Luna (low) has the lower benchmark cost at $0.049 vs $0.293. Inkling (low) is faster at 6.81s vs 6.96s, with pass rates of 56.5% vs 56.5%.

Last updated at: 2026-10-07

Compared models

Rank
#176
Total Output Tokens
28,001
Response Time (avg)
6.96s
Total Cost
$0.049
Rank
#181
Total Output Tokens
22,037
Response Time (avg)
6.81s
Total Cost
$0.293
Recommended model GPT-5.6 Luna (low)

It has the best score here (6.9), while costing about 6.0x less than Inkling (low).

Detailed comparison

Metric GPT-5.6 Luna GPT-5.6 Luna low Release: 2026-07-09 Inkling Inkling low Release: 2026-07-18 Free Available
Score 6.9 6.8
Rank #176 #181
Reliability 10.0 10.0
Consistency 8.3 8.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 56.5% 56.5%
Flaky tests 5 4
Total Runs 69 69
Cost per result 2.428 2.756
Total Cost $0.049 $0.293
Input Price $0.200 / 1M $0.950 / 1M
Output Price $1.200 / 1M $4.050 / 1M
Cache Read Price $0.020 / 1M $0.160 / 1M
Cache Write Price $0.250 / 1M N/A
Total Input Tokens 202,680 213,901
Output Tokens 9,230 9,623
Reasoning Tokens 18,771 12,414
Response Time (avg) 6.96s 6.81s
Response Time (max) 45.74s 44.24s
Response Time (total) 160.19s 156.70s
Parameters ~400B total (~17B active) 975B total (41B active)
Availability Closed Open source

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.

#176 GPT-5.6 Luna

low
Cost
$0.011
Time
10.2s
Tokens
1,897 tok

#181 Thinking Machines: Inkling

low
Cost
$0.002
Time
6.1s
Tokens
502 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 10.0 33.3% 0 4.61s 7,302 557 3,535
Inkling 5.1 7.2 22.2% 1 8.71s 7,374 355 4,961

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