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

Summary

Kimi K2.5 (medium) vs GPT-5.6 Luna (medium) benchmark comparison: The average score is effectively tied at 7.5 vs 7.6. GPT-5.6 Luna (medium) has the lower benchmark cost at $0.258 vs $0.348. GPT-5.6 Luna (medium) is faster at 6.70s vs 98.43s, with pass rates of 68.3% vs 63.5%.

Recommended model: GPT-5.6 Luna (medium) - It has the best score here (7.6), while responding about 14.7x faster than Kimi K2.5 (medium).

Last updated at: 2026-07-09

Metric Kimi K2.5 Kimi K2.5 medium Release: 2026-01-27 GPT-5.6 Luna GPT-5.6 Luna medium Release: 2026-07-09
Score 7.5 7.6
Rank #55 #54
Reliability 10.0 10.0
Consistency 6.9 9.6
Tests Correct
Attempt pass rate 68.3% 63.5%
Flaky tests 8 1
Total Runs 63 63
Cost per result 3.704 1.978
Total Cost $0.348 $0.258
Input Price $0.375 / 1M $1.000 / 1M
Output Price $2.025 / 1M $6.000 / 1M
Total Input Tokens 34,312 35,699
Output Tokens 48,379 2,148
Reasoning Tokens 157,747 34,740
Response Time (avg) 98.43s 6.70s
Response Time (max) 281.00s 29.85s
Response Time (total) 1378.03s 140.62s

Generation showcase

Hamster playing table tennis

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

#55 MoonshotAI: Kimi K2.5

medium
Cost
$0.030
Time
58.6s
Tokens
8,683 tok

#54 GPT-5.6 Luna

medium
Cost
$0.014
Time
14.6s
Tokens
2,362 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 7.3 5.8 83.3% 2 51.38s 634 2,789 8,880
GPT-5.6 Luna 8.3 10.0 75.0% 0 2.52s 606 160 987
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 6.1 4.6 66.7% 2 217.49s 6,935 5,705 74,693
GPT-5.6 Luna 5.4 7.2 44.4% 1 10.38s 7,302 564 9,928
Combined 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 71.37s 11,280 703 3,713
GPT-5.6 Luna 10.0 10.0 100.0% 0 9.53s 12,500 375 1,354
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 10.0 10.0 100.0% 0 49.78s 7,020 563 7,940
GPT-5.6 Luna 10.0 10.0 100.0% 0 1.95s 7,140 234 324
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 3.5 4.4 33.3% 2 137.29s 485 20,753 30,564
GPT-5.6 Luna 5.3 10.0 33.3% 0 17.37s 723 68 16,531
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 6.5 3.4 66.7% 1 69.73s 480 3,815 4,262
GPT-5.6 Luna 5.1 10.0 0.0% 0 4.34s 477 112 496
Instructions following 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 92.47s 675 5,371 6,547
GPT-5.6 Luna 9.9 10.0 100.0% 0 2.38s 660 95 393
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.5 5.3 7.3 44.4% 1 43.23s 659 8,426 12,692
GPT-5.6 Luna 7.8 10.0 66.7% 0 4.04s 642 255 2,104
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 31.74s 5,933 242 812
GPT-5.6 Luna 10.0 10.0 100.0% 0 6.02s 5,454 256 244
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 83.95s 211 12 7,644
GPT-5.6 Luna 3.0 10.0 0.0% 0 6.64s 195 29 2,379

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