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Kimi K2.5 vs GPT-5.6 Luna

The average score is effectively tied at 5.4 vs 5.4. GPT-5.6 Luna has the lower benchmark cost at $0.029 vs $0.101. GPT-5.6 Luna is faster at 1.50s vs 18.03s, with pass rates of 30.3% vs 36.4%.

Last updated at: 2026-08-20

Rank
#223
Total Output Tokens
26,643
Response Time (avg)
18.03s
Total Cost
$0.101
Rank
#221
Total Output Tokens
6,709
Response Time (avg)
1.50s
Total Cost
$0.029
Recommended model GPT-5.6 Luna

It has the best score here (5.4), while costing about 3.5x less than Kimi K2.5.

Detailed comparison

Metric Kimi K2.5 Kimi K2.5 none Release: 2026-01-27 GPT-5.6 Luna GPT-5.6 Luna none Release: 2026-07-09
Score 5.4 5.4
Rank #223 #221
Reliability 10.0 10.0
Consistency 8.6 8.8
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 30.3% 36.4%
Flaky tests 4 3
Total Runs 66 66
Cost per result 2.278 2.357
Total Cost $0.101 $0.029
Input Price $0.450 / 1M $0.200 / 1M
Output Price $2.250 / 1M $1.200 / 1M
Total Input Tokens 89,320 101,332
Output Tokens 26,643 6,709
Reasoning Tokens 0 0
Response Time (avg) 18.03s 1.50s
Response Time (max) 102.83s 10.57s
Response Time (total) 288.42s 33.05s
Parameters 1T total (32B active) ~400B total (~17B active)
Availability Weights available Closed

Model generation showcase

Hamster playing table tennis

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

#223 MoonshotAI: Kimi K2.5

none
Cost
$0.015
Time
89.1s
Tokens
5,421 tok

#221 GPT-5.6 Luna

none
Cost
$0.016
Time
15.8s
Tokens
2,685 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
Kimi K2.5 5.5 10.0 33.3% 0 24.56s 7,311 4,708 0
GPT-5.6 Luna 3.8 7.2 22.2% 1 980ms 7,302 459 0

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