Sleev maintains a curated set of frontier model families designated as Premium. Requests to these models count against your monthly Premium request quota when Sleev saves tokens on them. Models outside these Premium families are completely free to optimize with Sleev.
| Provider | Model Family |
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Every model in a listed family counts as Premium, including older ones. For example, Claude Opus 4.8, GPT-5.4 Pro, and Gemini 2.5 Pro are Premium models.