Optimus Alpha has a larger context window than GPT-5.1 Chat (1.0M tokens vs 128K tokens).
| Spec | GPT-5.1 Chat | Optimus Alpha |
|---|---|---|
| Input price | $1.25/M tokens | — |
| Output price | $10/M tokens | — |
| Context window | 128K tokens | 1.0M tokens |
| Released | Nov 2025 | Apr 2025 |
Not enough votes to call it. On the specs, nothing separates them.
Optimus Alpha uses 30.5x more headings
Optimus Alpha has a larger context window than GPT-5.1 Chat (1.0M tokens vs 128K tokens).
| Spec | GPT-5.1 Chat | Optimus Alpha |
|---|---|---|
| Input price | $1.25/M tokens | — |
| Output price | $10/M tokens | — |
| Context window | 128K tokens | 1.0M tokens |
| Released | Nov 2025 | Apr 2025 |
Not enough votes to call it. On the specs, nothing separates them.
Optimus Alpha uses 30.5x more headings