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Kimi K2.5 vs GPT-5.6 Luna

The average score is effectively tied at 5.3 vs 5.3. GPT-5.6 Luna has the lower benchmark cost at $0.042 vs $0.262. GPT-5.6 Luna is faster at 3.78s vs 35.86s, with pass rates of 29.0% vs 34.8%.

Last updated at: 2026-10-07

Compared models

Rank
#299
Total Output Tokens
49,389
Response Time (avg)
35.86s
Total Cost
$0.262
Rank
#297
Total Output Tokens
8,000
Response Time (avg)
3.78s
Total Cost
$0.042
Recommended model GPT-5.6 Luna

It has the best score here (5.3), while costing about 6.3x 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 5.3 5.3
Rank #299 #297
Reliability 10.0 10.0
Consistency 8.6 8.8
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 29.0% 34.8%
Flaky tests 4 3
Total Runs 69 69
Cost per result 4.976 2.814
Total Cost $0.262 $0.042
Input Price $0.450 / 1M $0.200 / 1M
Output Price $2.250 / 1M $1.200 / 1M
Cache Read Price $0.070 / 1M $0.020 / 1M
Cache Write Price N/A $0.250 / 1M
Total Input Tokens 275,349 230,744
Output Tokens 49,377 8,000
Reasoning Tokens 12 0
Response Time (avg) 35.86s 3.78s
Response Time (max) 321.19s 53.77s
Response Time (total) 609.61s 86.83s
Parameters 1T total (32B active) ~400B total (~17B active)
Availability Weights available 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.

#299 MoonshotAI: Kimi K2.5

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

#297 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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