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

Summary

Kimi K2.5 (medium) vs GPT-5.6 Luna (high) benchmark comparison: GPT-5.6 Luna (high) leads on average score with 7.7 vs 7.5. Kimi K2.5 (medium) has the lower benchmark cost at $0.348 vs $0.924. GPT-5.6 Luna (high) is faster at 18.39s vs 98.43s, with pass rates of 68.3% vs 71.4%.

Recommended model: GPT-5.6 Luna (high) - It has the best score here (7.7), while responding about 5.4x 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 high Release: 2026-07-09
Score 7.5 7.7
Rank #55 #50
Reliability 10.0 10.0
Consistency 6.9 8.8
Tests Correct
Attempt pass rate 68.3% 71.4%
Flaky tests 8 3
Total Runs 63 63
Cost per result 3.704 6.594
Total Cost $0.348 $0.924
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 2,079
Reasoning Tokens 157,747 145,816
Response Time (avg) 98.43s 18.39s
Response Time (max) 281.00s 111.09s
Response Time (total) 1378.03s 386.24s

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

#50 GPT-5.6 Luna

high
Cost
$0.033
Time
34.2s
Tokens
5,484 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 2.99s 606 162 1,265
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 5.5 4.7 55.6% 2 15.63s 7,302 510 17,746
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 13.29s 12,500 357 2,911
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 2.18s 7,140 234 470
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 7.7 10.0 66.7% 0 78.96s 723 69 96,395
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 5.0 10.0 0.0% 0 3.65s 477 117 563
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 1.79s 660 97 481
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 7.6 7.2 77.8% 1 14.55s 642 242 18,281
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 4.98s 5,454 260 324
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 17.00s 195 31 7,380

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