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MoonshotAI: Kimi K2.6 vs xAI: Grok 4.20

Last updated at: 2026-05-10

Metric Kimi K2.6 Kimi K2.6 none Release: 2026-04-20 Grok 4.20 Grok 4.20 none Release: 2026-03-31
Score 5.7 5.4
Rank #102 #115
Reliability 10.0 N/A
Consistency 9.2 9.5
Tests Correct
Attempt pass rate 40.4% 35.2%
Flaky tests 2 1
Total Runs 57 54
Cost per result 0.546 1.574
Total Cost $0.039 $0.095
Input Price $0.750 / 1M $1.250 / 1M
Output Price $3.500 / 1M $2.500 / 1M
Output Tokens 2,990 1,967
Reasoning Tokens 0 0
Response Time (avg) 2.02s 1.11s
Response Time (max) 6.65s 6.04s
Response Time (total) 38.29s 20.02s

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
Grok 4.20 4.8 10.0 25.0% 0 501ms 267 0
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
Grok 4.20 3.4 9.3 0.0% 0 1.22s 312 0
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
Grok 4.20 3.0 10.0 0.0% 0 6.04s 282 0
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
Grok 4.20 10.0 10.0 100.0% 0 522ms 207 0
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
Grok 4.20 3.0 10.0 0.0% 0 687ms 325 0
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
Grok 4.20 4.8 10.0 0.0% 0 659ms 83 0
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
Grok 4.20 6.3 10.0 50.0% 0 455ms 60 0
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Output Tokens Reasoning Tokens
Kimi K2.6 3.2 9.8 0.0% 0 1.66s 343 0
Grok 4.20 5.3 7.2 44.4% 1 487ms 242 0
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
Grok 4.20 10.0 10.0 100.0% 0 4.63s 189 0
Trivia 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 1.36s 17 0
Grok 4.20 - - - - - - - -

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