Providers and models

Registry agents accept an AdapterFactory; they do not hard-code a model provider. The rest of the factory stays unchanged when you switch adapters.

Hosted provider

import { anthropic } from '@agentskit/adapters'

const agent = createMyAgent({
  adapter: anthropic({
    apiKey: process.env.ANTHROPIC_API_KEY!,
    model: 'claude-sonnet-4-5',
  }),
})

Local provider

npx agentskit add my-agent --run "Summarize this" --provider ollama

Local models avoid a provider key, but tool calling and structured output support vary by model. Run the agent evaluation suite against the exact model you plan to deploy.

Configuration file

The CLI also reads .agentskit.config.json for defaults. Keep secrets in environment variables; store only provider names, model identifiers, and non-secret options in configuration files.

Choosing a model

Use a model that supports the capabilities the agent requires. Check structured output and tool calling first, then compare quality, latency, and cost with representative evaluation inputs.