Grok 4.20 BetavsKimi K2 0905
Kimi K2 0905 is cheaper than Grok 4.20 Beta at $0.6/M vs $2/M input tokens.
| Spec | Grok 4.20 Beta | Kimi K2 0905 |
|---|---|---|
| Input price | $2/M tokens | $0.6/M tokens |
| Output price | $6/M tokens | $2.5/M tokens |
| Context window | 2.0M tokens | 262K tokens |
| Weights | Closed | Open |
| Free API (OpenRouter) | No | No |
| Released | Mar 2026 | Sep 2025 |
Our Verdict
Grok 4.20 Beta
Kimi K2 0905Runner-up
Not enough votes to call it. On the specs, Grok 4.20 Beta has the edge: newer, bigger context window, major provider backing.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Grok 4.20 Beta
Input
$2.00
Output
$6.00
Kimi K2 0905
Input
$0.60
3.3× cheaper
Output
$2.50
2.4× cheaper
Kimi K2 0905 is cheaper on both: 3.3× input, 2.4× output.
Where to run it
2 hosts
Grok 4.20 Beta1 host
Kimi K2 09051 host
Per million tokens. Prices and uptime via OpenRouter, checked 11 Sep 2026.
Writing DNA
Style Comparison
Similarity
48%
Kimi K2 0905 uses 11.5x more emoji
Grok 4.20 Beta
Kimi K2 0905
57%Vocabulary65%
20wSentence Length21w
0.35Hedging0.16
4.2Bold2.8
3.7Lists3.0
0.00Emoji0.11
0.62Headings0.69
0.14Transitions0.06
Based on 23 + 28 text responses
Research
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FAQ
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