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GPT-5.6 Luna (medium) vs Grok 4.6 (low)

GPT-5.6 Luna (medium) leads on average score with 7.4 vs 7.4. GPT-5.6 Luna (medium) has the lower benchmark cost at $0.036 vs $0.449. GPT-5.6 Luna (medium) is faster at 7.43s vs 14.55s, with pass rates of 62.1% vs 69.7%.

Last updated at: 2026-08-14

Rank
#90
Total Output Tokens
44,525
Response Time (avg)
7.43s
Total Cost
$0.036
Rank
#93
Total Output Tokens
38,048
Response Time (avg)
14.55s
Total Cost
$0.449
Recommended model GPT-5.6 Luna (medium)

It has the best score here (7.4), while costing about 12.6x less than Grok 4.6 (low).

Detailed comparison

Metric GPT-5.6 Luna GPT-5.6 Luna medium Release: 2026-07-09 Grok 4.6 Grok 4.6 low Release: 2026-08-12
Score 7.4 7.4
Rank #90 #93
Reliability 10.0 10.0
Consistency 9.2 9.6
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 62.1% 69.7%
Flaky tests 2 1
Total Runs 66 66
Cost per result 2.601 2.989
Total Cost $0.036 $0.449
Input Price $0.100 / 1M $2.000 / 1M
Output Price $0.600 / 1M $6.000 / 1M
Total Input Tokens 89,685 109,960
Output Tokens 5,701 5,124
Reasoning Tokens 38,824 32,924
Response Time (avg) 7.43s 14.55s
Response Time (max) 29.85s 26.46s
Response Time (total) 163.54s 320.17s
Parameters ~400B total (~17B active) ~1.7T total (~170B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#90 GPT-5.6 Luna

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

#93 SpaceXAI: Grok 4.6

low
Cost
$0.011
Time
26.0s
Tokens
1,941 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 5.4 7.2 44.4% 1 10.38s 7,302 564 9,928
Grok 4.6 5.5 7.1 44.4% 1 21.69s 9,579 349 7,740

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