GPT-5.1vsKimi Linear 48B A3B Instruct
Kimi Linear 48B A3B Instruct is cheaper than GPT-5.1 at $0.3/M vs $1.25/M input tokens.
| Spec | GPT-5.1 | Kimi Linear 48B A3B Instruct |
|---|---|---|
| Input price | $1.25/M tokens | $0.3/M tokens |
| Output price | $10/M tokens | $0.6/M tokens |
| Context window | 400K tokens | 1.0M tokens |
| Weights | Closed | Open |
| Free API (OpenRouter) | No | No |
| Released | Nov 2025 | Nov 2025 |
Our Verdict
GPT-5.1
Kimi Linear 48B A3B Instruct
Not enough votes to call it. On the specs, nothing separates them.
Kimi Linear 48B A3B Instruct costs 17x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-5.1
Input
$1.25
Output
$10.00
Kimi Linear 48B A3B Instruct
Input
$0.30
4.2× cheaper
Output
$0.60
17× cheaper
Kimi Linear 48B A3B Instruct is cheaper on both: 4.2× input, 17× output.
Where to run it
2 hosts
Kimi Linear 48B A3B Instruct
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
65%
GPT-5.1 uses 2.3x more lists
GPT-5.1
Kimi Linear 48B A3B Instruct
62%Vocabulary63%
19wSentence Length15w
0.29Hedging0.19
3.5Bold5.2
7.2Lists3.2
0.00Emoji0.00
0.61Headings0.38
0.03Transitions0.05
Based on 14 + 14 text responses
Research
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