Bert-Nebulon AlphavsHy4 Preview
Hy4 Preview is the newer model, released after Bert-Nebulon Alpha.
| Spec | Bert-Nebulon Alpha | Hy4 Preview |
|---|---|---|
| Input price | — | $0.834/M tokens |
| Output price | — | $2.501/M tokens |
| Context window | — | 1.0M tokens |
| Free API (OpenRouter) | No | No |
| Released | Nov 2025 | Aug 2026 |
Our Verdict
Hy4 Preview
Bert-Nebulon AlphaRunner-up
Not enough votes to call it. On the specs, Hy4 Preview has the edge: bigger model tier, newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
Bert-Nebulon Alpha
Input
—
Output
—
Hy4 Preview
Input
$0.83
Output
$2.50
Where to run it
1 host
Bert-Nebulon Alpha
No hosts listed on OpenRouter.
Hy4 Preview1 host
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
65%
Hy4 Preview uses 2.9x more transitions
Bert-Nebulon Alpha
Hy4 Preview
55%Vocabulary53%
21wSentence Length16w
0.28Hedging0.43
10.9Bold5.9
5.7Lists3.8
0.42Emoji0.40
1.40Headings0.67
0.04Transitions0.13
Based on 14 + 27 text responses
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