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MoonshotAI: Kimi K2.5 vs OpenAI: GPT-5.5

Last updated at: 2026-04-24

Metric Kimi K2.5 Kimi K2.5 medium Release: 2026-01-27 GPT-5.5 GPT-5.5 none Release: 2026-04-24
Score 7.0 6.8
Rank #54 #58
Reliability N/A N/A
Consistency 6.8 8.3
Tests Correct
Attempt pass rate 72.2% 61.1%
Flaky tests 7 4
Total Runs 54 54
Cost per result 2.444 2.162
Total Cost $0.220 $0.195
Input Price $0.440 / 1M $5.000 / 1M
Output Price $2.000 / 1M $30.000 / 1M
Output Tokens 42,176 1,910
Reasoning Tokens 84,870 0
Response Time (avg) 72.43s 1.83s
Response Time (max) 150.77s 5.56s
Response Time (total) 796.70s 32.86s

Top Models by Score

Score vs Total Cost

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Score vs Response Time (avg)

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Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 7.3 5.8 83.3% 2 51.38s 2,789 8,880
GPT-5.5 6.9 7.9 66.7% 1 1.31s 213 0
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 4.7 1.6 66.7% 1 150.77s 1,269 9,749
GPT-5.5 10.0 10.0 100.0% 0 2.05s 426 0
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 71.37s 703 3,713
GPT-5.5 3.0 10.0 0.0% 0 5.56s 300 0
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 49.78s 563 7,940
GPT-5.5 10.0 10.0 100.0% 0 1.18s 222 0
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 3.5 4.4 33.3% 2 137.29s 20,753 30,564
GPT-5.5 2.9 7.2 11.1% 1 1.31s 52 0
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 6.5 3.4 66.7% 1 69.73s 3,815 4,262
GPT-5.5 10.0 10.0 100.0% 0 3.41s 124 0
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 92.47s 5,371 6,547
GPT-5.5 6.2 5.8 66.7% 1 1.15s 81 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 5.3 7.3 44.4% 1 45.40s 6,671 12,403
GPT-5.5 6.7 7.9 55.6% 1 1.36s 245 0
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.5 10.0 10.0 100.0% 0 31.74s 242 812
GPT-5.5 10.0 10.0 100.0% 0 3.90s 247 0

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