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MoonshotAI: Kimi K2.6 vs xAI: Grok 4.20

Summary

Kimi K2.6 vs Grok 4.20 benchmark comparison: Kimi K2.6 leads on average score with 7.8 vs 7.3. Grok 4.20 has the lower benchmark cost at $0.609 vs $0.889. Grok 4.20 is faster at 27.68s vs 71.67s, with pass rates of 65.1% vs 63.5%.

Recommended model: Grok 4.20 - Its score stays close to the best score here (7.3 vs 7.8), while responding about 2.6x faster than Kimi K2.6.

Last updated at: 2026-06-18

Metric Kimi K2.6 Kimi K2.6 medium Release: 2026-04-20 Free Available Grok 4.20 Grok 4.20 medium Release: 2026-03-31
Score 7.8 7.3
Rank #35 #53
Reliability 10.0 10.0
Consistency 8.6 8.8
Tests Correct
Attempt pass rate 65.1% 63.5%
Flaky tests 3 3
Total Runs 63 63
Cost per result 8.358 8.309
Total Cost $0.889 $0.609
Input Price $0.680 / 1M $1.250 / 1M
Output Price $3.410 / 1M $2.500 / 1M
Total Input Tokens 29,450 44,433
Output Tokens 102,923 1,819
Reasoning Tokens 254,094 219,524
Response Time (avg) 71.67s 27.68s
Response Time (max) 406.78s 199.66s
Response Time (total) 1433.36s 581.26s

Generation showcase

Hamster playing table tennis

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

#35 MoonshotAI: Kimi K2.6

medium
Cost
$0.013
Time
103.4s
Tokens
3,620 tok

#53 xAI: Grok 4.20

medium
Cost
$0.041
Time
110.3s
Tokens
16,336 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 K2.6 7.0 8.0 66.7% 1 11.59s 618 7,115 8,934
Grok 4.20 8.2 7.9 83.3% 1 3.95s 2,010 287 8,312
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 5.7 8.6 33.3% 0 214.42s 2,925 9,970 77,189
Grok 4.20 6.3 6.6 55.6% 1 109.93s 8,307 268 103,150
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 10.0 10.0 100.0% 0 40.96s 11,271 711 13,876
Grok 4.20 10.0 10.0 100.0% 0 17.40s 12,909 232 9,556
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 10.0 10.0 100.0% 0 20.38s 7,014 316 11,305
Grok 4.20 10.0 10.0 100.0% 0 4.17s 7,761 180 5,333
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 5.3 7.2 44.4% 1 202.38s 326 47,035 98,262
Grok 4.20 5.3 10.0 33.3% 0 27.03s 1,764 375 49,339
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 10.0 10.0 100.0% 0 17.83s 477 3,981 4,472
Grok 4.20 3.9 2.6 33.3% 1 24.48s 825 65 6,440
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 10.0 10.0 100.0% 0 12.53s 669 3,977 5,269
Grok 4.20 9.8 10.0 100.0% 0 4.26s 1,362 57 6,419
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 6.0 7.4 55.6% 1 25.06s 651 13,860 17,599
Grok 4.20 7.7 10.0 66.7% 0 6.22s 1,689 149 7,913
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 10.0 10.0 100.0% 0 8.92s 5,286 248 1,011
Grok 4.20 3.0 10.0 0.0% 0 13.68s 7,275 197 6,620
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Kimi K2.6 3.0 10.0 0.0% 0 130.27s 213 15,710 16,177
Grok 4.20 3.0 10.0 0.0% 0 63.48s 531 9 16,442

Quick Compare

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