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MoonshotAI: Kimi K2.6 vs OpenAI: GPT-5 Nano

Last updated at: 2026-04-20

Metric Kimi K2.6 Kimi K2.6 none Release: 2026-04-20 GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07
Score 5.8 6.3
Rank #69 #57
Consistency 9.1 6.5
Tests Correct
Attempt pass rate 42.6% 59.3%
Flaky tests 2 8
Total Runs 54 54
Cost per result 0.543 0.942
Total Cost $0.038 $0.066
Input Price $0.950 / 1M $0.050 / 1M
Output Price $4.000 / 1M $0.400 / 1M
Output Tokens 2,973 4,980
Reasoning Tokens 0 156,288
Response Time (avg) 2.05s 44.13s
Response Time (max) 6.65s 204.02s
Response Time (total) 36.93s 485.47s

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) Output Tokens Reasoning Tokens
Kimi K2.6 4.6 10.0 25.0% 0 1.39s 471 0
GPT-5 Nano 6.5 7.9 58.3% 1 25.50s 1,221 21,184
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 10.0 10.0 100.0% 0 6.65s 1,176 0
GPT-5 Nano 6.7 3.5 66.7% 1 40.73s 480 12,992
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 3.0 10.0 0.0% 0 3.38s 290 0
GPT-5 Nano 10.0 10.0 100.0% 0 65.96s 578 17,984
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 10.0 10.0 100.0% 0 1.32s 201 0
GPT-5 Nano 3.7 1.7 50.0% 2 21.42s 453 10,560
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 5.3 7.2 44.4% 1 1.48s 42 0
GPT-5 Nano 5.2 4.4 55.6% 2 204.02s 237 64,448
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 5.4 3.5 33.3% 1 1.55s 138 0
GPT-5 Nano 4.1 10.0 0.0% 0 17.51s 202 4,608
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 6.5 10.0 50.0% 0 1.64s 72 0
GPT-5 Nano 8.5 6.8 83.3% 1 11.90s 382 4,096
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 3.4 9.7 0.0% 0 1.66s 343 0
GPT-5 Nano 5.3 7.2 44.4% 1 19.81s 869 13,440
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 10.0 10.0 100.0% 0 4.46s 240 0
GPT-5 Nano 10.0 10.0 100.0% 0 33.30s 558 6,976

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