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  5. Bert-Nebulon AlphavsGPT-4.5
Updated Nov 2025

Bert-Nebulon AlphavsGPT-4.5

Bert-Nebulon Alpha is the newer model, released after GPT-4.5.

Bert-Nebulon Alpha and GPT-4.5 compared across 22 shared prompts
SpecBert-Nebulon AlphaGPT-4.5
Input price—$75/M tokens
Output price—$150/M tokens
Context window—128K tokens
Free API (OpenRouter)NoNo
ReleasedNov 2025Feb 2025
Our Verdict
GPT-4.5
GPT-4.5
Bert-Nebulon Alpha
Bert-Nebulon AlphaRunner-up

Not enough votes to call it. On the specs, GPT-4.5 has the edge: bigger model tier, 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

Bert-Nebulon Alpha
Input
—
Output
—
GPT-4.5
Input
$75.00
Output
$150.00
Writing DNA

Style Comparison

Similarity
40%

Bert-Nebulon Alpha uses 42.4x more emoji

Bert-Nebulon Alpha
GPT-4.5
55%Vocabulary63%
21wSentence Length16w
0.28Hedging0.57
10.9Bold4.7
5.7Lists6.4
0.42Emoji0.00
1.40Headings1.30
0.04Transitions0.54
Based on 14 + 11 text responses
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