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

Summary

Kimi K2.5 vs GPT-5.5 benchmark comparison: GPT-5.5 leads on average score with 9.3 vs 7.5. Kimi K2.5 has the lower benchmark cost at $0.348 vs $0.907. GPT-5.5 is faster at 9.76s vs 98.43s, with pass rates of 68.3% vs 85.7%.

Recommended model: GPT-5.5 - It has the best score here (9.3), while responding about 10.1x faster than Kimi K2.5.

Last updated at: 2026-07-02

Metric Kimi K2.5 Kimi K2.5 medium Release: 2026-01-27 GPT-5.5 GPT-5.5 low Release: 2026-04-24
Score 7.5 9.3
Rank #45 #4
Reliability 10.0 10.0
Consistency 6.9 10.0
Tests Correct
Attempt pass rate 68.3% 85.7%
Flaky tests 8 0
Total Runs 63 63
Cost per result 3.704 5.035
Total Cost $0.348 $0.907
Input Price $0.375 / 1M $5.000 / 1M
Output Price $2.025 / 1M $30.000 / 1M
Total Input Tokens 34,312 34,209
Output Tokens 48,379 2,046
Reasoning Tokens 157,747 22,460
Response Time (avg) 98.43s 9.76s
Response Time (max) 281.00s 56.19s
Response Time (total) 1378.03s 204.92s

Generation showcase

Hamster playing table tennis

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

#45 MoonshotAI: Kimi K2.5

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

#4 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 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-5.5 10.0 10.0 100.0% 0 4.41s 606 238 1,020
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-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402
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-5.5 10.0 10.0 100.0% 0 9.56s 11,019 303 717
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-5.5 10.0 10.0 100.0% 0 3.28s 7,140 228 157
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-5.5 5.3 10.0 33.3% 0 28.05s 723 69 11,609
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-5.5 10.0 10.0 100.0% 0 5.17s 477 133 245
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-5.5 9.9 10.0 100.0% 0 3.74s 660 93 415
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-5.5 10.0 10.0 100.0% 0 4.74s 642 279 954
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-5.5 10.0 10.0 100.0% 0 4.96s 5,445 250 101
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-5.5 3.0 10.0 0.0% 0 10.06s 195 30 840

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