@anvia/anthropic API reference

Import every public symbol from @anvia/anthropic. The package has no public subpath exports.

AnthropicClient

type AnthropicClientOptions = {
  apiKey?: string
  baseUrl?: string
  client?: Anthropic
}

class AnthropicClient implements ModelListingClient {
  readonly client: Anthropic

  constructor(options?: AnthropicClientOptions)

  completionModel(
    model?: AnthropicCompletionModelName,
  ): AnthropicCompletionModel

  listModels(): Promise<ModelList>
}

Construction requires a non-empty API key unless client is supplied. completionModel() defaults to claude-sonnet-4-20250514. listModels() normalizes the Anthropic model list and wraps failures in ModelListingError.

AnthropicVertexClient

type AnthropicVertexClientOptions = ClientOptions & {
  client?: AnthropicVertex
}

class AnthropicVertexClient {
  readonly client: AnthropicVertex

  constructor(options?: AnthropicVertexClientOptions)

  completionModel(
    model?: AnthropicCompletionModelName,
  ): AnthropicCompletionModel
}

ClientOptions comes from @anthropic-ai/vertex-sdk. It includes the official SDK’s project, region, Google authentication, access-token, and transport options. The factory defaults to claude-sonnet-5. It intentionally has no listModels() method.

AnthropicCompletionModel

class AnthropicCompletionModel
  implements StreamingCompletionModel<unknown, AnthropicCompletionModelName> {
  readonly defaultModel: AnthropicCompletionModelName
  readonly provider: 'anthropic'
  readonly capabilities: CompletionModelCapabilities

  constructor(
    client: Anthropic | AnthropicVertex,
    defaultModel?: AnthropicCompletionModelName,
    metadataOptions?: CompletionModelMetadataOptions,
  )

  getModelInfo(
    model?: AnthropicCompletionModelName,
  ): CompletionModelInfo<AnthropicCompletionModelName> | undefined

  traceRequest(
    request: CompletionRequest<AnthropicCompletionModelName>,
    options?: { stream?: boolean },
  ): JsonObject

  completion(
    request: CompletionRequest<AnthropicCompletionModelName>,
  ): Promise<CompletionResponse>

  streamCompletion(
    request: CompletionRequest<AnthropicCompletionModelName>,
  ): AsyncIterable<CompletionStreamEvent>
}

The same adapter accepts either Anthropic client implementation and normalizes Messages API responses, stream events, usage, tool calls, and reasoning into Anvia completion types.

Model name types

type KnownAnthropicCompletionModelName =
  | 'claude-3-5-sonnet-20240620'
  | 'claude-3-5-sonnet-20241022'
  | 'claude-3-7-sonnet-20250219'
  | 'claude-3-haiku-20240307'
  | 'claude-3-opus-20240229'
  | 'claude-3-sonnet-20240229'
  | 'claude-fable-5'
  | 'claude-haiku-4-5'
  | 'claude-haiku-4-5-20251001'
  | 'claude-opus-4-0'
  | 'claude-opus-4-1'
  | 'claude-opus-4-1-20250805'
  | 'claude-opus-4-20250514'
  | 'claude-opus-4-5'
  | 'claude-opus-4-5-20251101'
  | 'claude-opus-4-6'
  | 'claude-opus-4-7'
  | 'claude-opus-4-8'
  | 'claude-sonnet-4-0'
  | 'claude-sonnet-4-20250514'
  | 'claude-sonnet-4-5'
  | 'claude-sonnet-4-5-20250929'
  | 'claude-sonnet-4-6'
  | 'claude-sonnet-5'

type AnthropicCompletionModelName = ModelId<KnownAnthropicCompletionModelName>

ModelId<KnownAnthropicCompletionModelName> retains autocomplete while permitting other string model IDs.

anthropic namespace

import { anthropic } from '@anvia/anthropic'

const client = new anthropic.AnthropicClient({ apiKey })

anthropic re-exports the same two clients, completion model, option types, and model-name types as a namespace. It has no state of its own.