GPT OSS 20BvsKimi K2
GPT OSS 20B is cheaper than Kimi K2 at $0.02/M vs $0.57/M input tokens.
| Spec | GPT OSS 20B | Kimi K2 |
|---|---|---|
| Input price | $0.02/M tokens | $0.57/M tokens |
| Output price | $0.1/M tokens | $2.3/M tokens |
| Context window | 131K tokens | — |
| Weights | Open | Open |
| Free API (OpenRouter) | No | No |
| Released | Aug 2025 | Jul 2025 |
Our Verdict
GPT OSS 20B
Kimi K2
Not enough votes to call it. On the specs, nothing separates them.
GPT OSS 20B costs 23x less per token.
Too close to call
API pricing
Cost per 1M tokens
GPT OSS 20B
Input
$0.02
28× cheaper
Output
$0.10
23× cheaper
Kimi K2
Input
$0.57
Output
$2.30
GPT OSS 20B is cheaper on both: 28× input, 23× output.
Where to run it
13 hosts, cheapest first
Kimi K21 host
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
51%
GPT OSS 20B uses 6.4x more transitions
GPT OSS 20B
Kimi K2
54%Vocabulary66%
17wSentence Length19w
0.26Hedging0.34
5.9Bold3.3
3.3Lists3.4
0.10Emoji0.54
0.75Headings0.48
0.32Transitions0.05
Based on 21 + 28 text responses
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