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GPT-6 Luna (medium) vs Grok 4.3 (medium)

GPT-6 Luna (medium) leads on average score with 8.3 vs 6.5. GPT-6 Luna (medium) has the lower benchmark cost at $0.047 vs $0.989. GPT-6 Luna (medium) is faster at 18.07s vs 44.53s, with pass rates of 73.9% vs 63.8%.

Last updated at: 2026-10-26

Compared models

Rank
#103
Total Output Tokens
53,161
Response Time (avg)
18.07s
Total Cost
$0.047
Rank
#245
Total Output Tokens
232,542
Response Time (avg)
44.53s
Total Cost
$0.989
Recommended model GPT-6 Luna (medium)

It has the best score here (8.3), while costing about 21.1x less than Grok 4.3 (medium).

Detailed comparison

Metric GPT-6 Luna GPT-6 Luna medium Release: 2026-09-23 Grok 4.3 Grok 4.3 medium Release: 2026-05-01
Score 8.3 6.5
Rank #103 #245
Reliability 10.0 10.0
Consistency 8.9 8.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 73.9% 63.8%
Flaky tests 3 5
Total Runs 69 69
Cost per result 0.313 8.235
Total Cost $0.047 $0.989
Input Price $0.100 / 1M $1.250 / 1M
Output Price $0.500 / 1M $2.500 / 1M
Cache Read Price $0.010 / 1M $0.200 / 1M
Cache Write Price $0.125 / 1M N/A
Total Input Tokens 203,193 325,471
Output Tokens 5,751 14,867
Reasoning Tokens 47,410 217,675
Response Time (avg) 18.07s 44.53s
Response Time (max) 66.44s 216.69s
Response Time (total) 415.53s 1024.25s
Parameters ~400B total (~17B active) ~1.5T total (~150B 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.

#103 GPT-6 Luna

medium
Cost
$0.002
Time
23.6s
Tokens
2,966 tok

#245 SpaceXAI: Grok 4.3

medium
Cost
$0.009
Time
19.0s
Tokens
3,661 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-6 Luna 6.6 4.6 77.8% 2 23.63s 7,302 438 10,222
Grok 4.3 5.9 7.7 44.4% 1 41.23s 8,340 1,028 31,226

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