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MoonshotAI: Kimi K3 vs xAI: Grok 4.5

Summary

Kimi K3 (max) leads on average score with 8.5 vs 8.3. Grok 4.5 (medium) has the lower benchmark cost at $1.696 vs $3.112. Grok 4.5 (medium) is faster at 62.63s vs 122.48s, with pass rates of 82.5% vs 77.8%.

Recommended modelGrok 4.5 (medium)Its score stays close to the best score here (8.3 vs 8.5), while costing about 1.8x less than Kimi K3 (max).

Last updated at: 2026-07-16

Metric Kimi K3 Kimi K3 max Release: 2026-07-16 Grok 4.5 Grok 4.5 medium Release: 2026-07-08
Score 8.5 8.3
Rank #21 #29
Reliability 9.4 9.9
Consistency 9.2 8.9
Tests Correct
Attempt pass rate 82.5% 77.8%
Flaky tests 2 3
Total Runs 63 63
Cost per result 19.446 11.304
Total Cost $3.112 $1.696
Input Price $3.000 / 1M $2.000 / 1M
Output Price $15.000 / 1M $6.000 / 1M
Total Input Tokens 34,916 53,500
Output Tokens 2,910 1,621
Reasoning Tokens 197,529 263,127
Response Time (avg) 122.48s 62.63s
Response Time (max) 766.58s 436.38s
Response Time (total) 2327.06s 1315.20s

Generation showcase

Hamster playing table tennis

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

#21 MoonshotAI: Kimi K3

max
Cost
$0.281
Time
506.9s
Tokens
18,863 tok

#29 xAI: Grok 4.5

medium
Cost
$0.044
Time
59.4s
Tokens
7,512 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
Kimi K3 10.0 10.0 100.0% 0 325.79s 8,061 460 84,012
Grok 4.5 7.6 7.2 77.8% 1 155.69s 9,579 390 104,634

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