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GPT-5.6 Luna (low) vs Space Bunny Alpha (medium)

Space Bunny Alpha (medium) leads on average score with 6.3 vs 6.2. Space Bunny Alpha (medium) has the lower benchmark cost at $0.000 vs $0.051. GPT-5.6 Luna (low) is faster at 5.20s vs 27.42s, with pass rates of 54.5% vs 54.6%.

Last updated at: 2026-09-24

Compared models

Rank
#221
Total Output Tokens
26,286
Response Time (avg)
5.20s
Total Cost
$0.051
Rank
#214
Total Output Tokens
168,654
Response Time (avg)
27.42s
Total Cost
$0.000
Recommended model GPT-5.6 Luna (low)

Its score stays close to the best score here (6.2 vs 6.3), while responding about 5.3x faster than Space Bunny Alpha (medium).

Detailed comparison

Metric GPT-5.6 Luna GPT-5.6 Luna low Release: 2026-07-09 Space Bunny Alpha Space Bunny Alpha medium Release: 2026-09-24
Score 6.2 6.3
Rank #221 #214
Reliability 10.0 10.0
Consistency 8.2 8.5
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 54.5% 54.6%
Flaky tests 5 4
Total Runs 66 66
Cost per result 2.437 0.000
Total Cost $0.051 $0.000
Input Price $0.200 / 1M $0.000 / 1M
Output Price $1.200 / 1M $0.000 / 1M
Total Input Tokens 96,355 131,452
Output Tokens 8,213 168,654
Reasoning Tokens 18,073 0
Response Time (avg) 5.20s 27.42s
Response Time (max) 19.44s 197.32s
Response Time (total) 114.46s 603.17s
Parameters ~400B total (~17B active) -
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#221 GPT-5.6 Luna

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

#214 Space Bunny Alpha

medium
Cost
$0.000
Time
35.4s
Tokens
4,894 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
Space Bunny Alpha 5.4 7.2 44.4% 1 6.82s 8,493 6,691 0

Quick Compare

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