Anthropic

Runtime provider id: anthropic. Talks to the native Anthropic Messages API.

Provider options

Field	Type	Notes
apiKey	string	Required (or set via environment).
baseURL	string	Optional. Override the API endpoint.
headers	Record<string, string>	Optional. Extra HTTP headers.
reasoning	object	Optional. See Reasoning.

Reasoning

Setting reasoning enables extended thinking (thinking: { type: "enabled", budget_tokens }); omit it entirely to leave thinking off. effort defaults to medium and always maps to an explicit budget_tokens:

effort	budget_tokens
minimal	1024
low	2048
medium	4096
high	8192

display is not supported by the native Anthropic API (api.anthropic.com) — only Bedrock Claude and MiniMax accept it. Setting display here will be rejected by the API.

Example configs

Anthropic without reasoning:

{
  "name": "Anthropic",
  "provider": "anthropic",
  "options": {
    "apiKey": "sk-ant-..."
  }
}

{
  "name": "Claude Sonnet",
  "provider": "Anthropic",
  "options": {
    "model": "claude-sonnet-4-5"
  },
  "default": true
}

Anthropic with extended thinking:

{
  "name": "Anthropic Thinking",
  "provider": "anthropic",
  "options": {
    "apiKey": "sk-ant-...",
    "reasoning": { "effort": "high" }
  }
}

{
  "name": "Claude Opus (thinking)",
  "provider": "Anthropic Thinking",
  "options": {
    "model": "claude-opus-4-5"
  }
}