Docs - Models
Choosing a model for your agent
Thirteen models across six vendors, grouped into three tiers. Pick by how hard the agent's job is, not by brand.
1. How to pick
Open the model picker in the agent editor. Each vendor lists its models on one ladder: Basic, Pro, Frontier. Start at Basic; move up only when answers feel shallow. The choice is within a vendor, not across them — Sonnet is simply Anthropic's Pro.
2. The three tiers
Same ladder for every vendor. Higher tiers cost more per call.
| Tier | Use it for | Note |
|---|---|---|
| Basic | Short, routine replies | Cheapest. The default floor. |
| Pro | Most real work | Balanced cost and quality. |
| Frontier | Hardest reasoning | Requires a real-money top-up before you can select it. |
Frontier is gated: you must add wallet balance once (a one-time conversion) before an agent can use a Frontier model.
3. What you pay
You pay LLM cost × rate per call — the raw model cost plus a 9% platform fee. Most short conversations cost a fraction of a cent. See /docs/topup for the wallet.
4. Tools need a capable model
Web search and other tools only run on models that support tool-calling. If your agent has tools granted but the model can't call them, the tools are silently unavailable. Pick a tool-capable model — see /docs/tools.
5. Switching later
You can change an agent's model any time in the editor. Existing conversations keep running; the new model applies to the next turn.