Bert-Nebulon Alpha is the newer model, released after GPT-4.5.
| Spec | Bert-Nebulon Alpha | GPT-4.5 |
|---|---|---|
| Input price | — | $75/M tokens |
| Output price | — | $150/M tokens |
| Context window | — | 128K tokens |
| Free API (OpenRouter) | No | No |
| Released | Nov 2025 | Feb 2025 |
Not enough votes to call it. On the specs, GPT-4.5 has the edge: bigger model tier, bigger context window, major provider backing.
Reviewing agent-written code?See a Brief PR report
Bert-Nebulon Alpha uses 42.4x more emoji