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Kwaipilot: KAT-Coder-Air V2.5 vs OpenAI: GPT-5 Nano

Summary

GPT-5 Nano (medium) leads on average score with 6.7 vs 6.2. KAT-Coder-Air V2.5 (high) has the lower benchmark cost at $0.064 vs $0.081. KAT-Coder-Air V2.5 (high) is faster at 11.02s vs 42.51s, with pass rates of 46.0% vs 57.1%.

Recommended modelGPT-5 Nano (medium)It has the strongest score in this comparison (6.7) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-14

Metric KAT-Coder-Air V2.5 KAT-Coder-Air V2.5 high Release: 2026-07-14 GPT-5 Nano GPT-5 Nano medium Release: 2025-08-07
Score 6.2 6.7
Rank #110 #97
Reliability 9.7 10.0
Consistency 7.6 7.3
Tests Correct
Attempt pass rate 46.0% 57.1%
Flaky tests 6 7
Total Runs 63 63
Cost per result 0.910 0.897
Total Cost $0.064 $0.081
Input Price $0.150 / 1M $0.050 / 1M
Output Price $0.600 / 1M $0.400 / 1M
Total Input Tokens 41,748 34,108
Output Tokens 3,894 5,464
Reasoning Tokens 91,773 192,064
Response Time (avg) 11.02s 42.51s
Response Time (max) 104.98s 204.02s
Response Time (total) 231.37s 595.09s

Generation showcase

Hamster playing table tennis

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

#110 KAT-Coder-Air V2.5

high
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 tok

#97 GPT-5 Nano

medium
Cost
$0.006
Time
108.5s
Tokens
13,209 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

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
KAT-Coder-Air V2.5 4.3 7.3 11.1% 1 39.07s 6,948 1,166 55,883
GPT-5 Nano 7.0 7.7 55.6% 1 41.62s 7,305 740 41,152

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