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MoonshotAI: Kimi K2.5 vs OpenAI: GPT-5.6 Luna

Summary

Kimi K2.5 vs GPT-5.6 Luna (low) benchmark comparison: GPT-5.6 Luna (low) leads on average score with 6.2 vs 5.5. Kimi K2.5 has the lower benchmark cost at $0.027 vs $0.141. GPT-5.6 Luna (low) is faster at 4.35s vs 13.18s, with pass rates of 34.9% vs 57.1%.

Recommended model: GPT-5.6 Luna (low) - It has the best score here (6.2), while responding about 3.0x faster than Kimi K2.5.

Last updated at: 2026-07-10

Metric Kimi K2.5 Kimi K2.5 none Release: 2026-01-27 GPT-5.6 Luna GPT-5.6 Luna low Release: 2026-07-09
Score 5.5 6.2
Rank #136 #108
Reliability 10.0 10.0
Consistency 8.9 8.5
Tests Correct
Attempt pass rate 34.9% 57.1%
Flaky tests 3 4
Total Runs 63 63
Cost per result 0.442 1.404
Total Cost $0.027 $0.141
Input Price $0.375 / 1M $1.000 / 1M
Output Price $2.025 / 1M $6.000 / 1M
Total Input Tokens 36,034 34,218
Output Tokens 6,657 2,110
Reasoning Tokens 0 15,571
Response Time (avg) 13.18s 4.35s
Response Time (max) 42.13s 18.06s
Response Time (total) 184.47s 91.45s

Generation showcase

Hamster playing table tennis

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

#136 MoonshotAI: Kimi K2.5

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

#108 GPT-5.6 Luna

low
Cost
$0.011
Time
10.2s
Tokens
1,897 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

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 3.6 8.4 8.3% 1 6.24s 652 373 0
GPT-5.6 Luna 8.3 10.0 75.0% 0 2.21s 606 186 722
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 5.5 10.0 33.3% 0 4.61s 7,302 557 3,535
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 2.8 2.1 33.3% 1 19.16s 12,264 748 0
GPT-5.6 Luna 2.8 1.6 33.3% 1 7.99s 11,019 300 1,060
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 7.3 5.8 83.3% 1 42.13s 7,180 187 0
GPT-5.6 Luna 10.0 10.0 100.0% 0 2.14s 7,140 234 292
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 5.3 10.0 33.3% 0 4.38s 753 29 0
GPT-5.6 Luna 3.6 7.2 22.2% 1 10.05s 723 70 6,718
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 4.00s 483 76 0
GPT-5.6 Luna 5.0 10.0 0.0% 0 2.25s 477 122 169
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 6.5 10.0 50.0% 0 2.67s 677 60 0
GPT-5.6 Luna 8.5 6.8 83.3% 1 2.04s 660 93 259
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 3.0 10.0 0.0% 0 4.04s 667 236 0
GPT-5.6 Luna 7.6 7.2 77.8% 1 3.59s 642 271 1,207
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 13.99s 5,835 220 0
GPT-5.6 Luna 10.0 10.0 100.0% 0 4.43s 5,454 250 177
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 3.0 10.0 0.0% 0 3.90s 212 20 0
GPT-5.6 Luna 3.0 10.0 0.0% 0 4.86s 195 27 1,432

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