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OpenAI: GPT-5.6 Luna vs Thinking Machines: Inkling

Inkling (medium) leads on average score with 8.0 vs 7.7. Inkling (medium) has the lower benchmark cost at $0.391 vs $1.017. Inkling (medium) is faster at 16.21s vs 18.68s, with pass rates of 72.7% vs 78.8%.

Recommended modelInkling (medium)It has the best score here (8.0), while costing about 2.6x less than GPT-5.6 Luna (high).

Last updated at: 2026-07-18

Metric GPT-5.6 Luna GPT-5.6 Luna high Release: 2026-07-09 Inkling Inkling medium Release: 2026-07-18
Score 7.7 8.0
Rank #44 #32
Reliability 10.0 9.8
Consistency 8.9 8.2
Tests Correct
Attempt pass rate 72.7% 78.8%
Flaky tests 3 5
Total Runs 66 66
Cost per result 6.780 2.604
Total Cost $1.017 $0.391
Input Price $1.000 / 1M $1.000 / 1M
Output Price $6.000 / 1M $4.050 / 1M
Total Input Tokens 80,918 124,053
Output Tokens 5,088 12,189
Reasoning Tokens 150,910 53,597
Response Time (avg) 18.68s 16.21s
Response Time (max) 111.09s 85.12s
Response Time (total) 411.05s 356.54s

Hamster playing table tennis

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

#44 GPT-5.6 Luna

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

#32 Thinking Machines: Inkling

medium
Cost
$0.004
Time
11.2s
Tokens
852 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
Inkling 8.4 7.8 77.8% 1 25.20s 7,374 525 14,457

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