chat_claude: Chat with an Anthropic Claude model

In ellmer: Chat with Large Language Models

Chat with an Anthropic Claude model

Description

Anthropic provides a number of chat based models under the Claude moniker. Note that a Claude Pro membership does not give you the ability to call models via the API; instead, you will need to sign up (and pay for) a developer account

Authentication

To authenticate, we recommend saving your API key to the ANTHROPIC_API_KEY env var in your .Renviron (which you can easily edit by calling usethis::edit_r_environ()).

Usage

chat_claude(
  system_prompt = NULL,
  turns = NULL,
  max_tokens = 4096,
  model = NULL,
  api_args = list(),
  base_url = "https://api.anthropic.com/v1",
  api_key = anthropic_key(),
  echo = NULL
)

Arguments

system_prompt	A system prompt to set the behavior of the assistant.
turns	A list of Turns to start the chat with (i.e., continuing a previous conversation). If not provided, the conversation begins from scratch.
max_tokens	Maximum number of tokens to generate before stopping.
model	The model to use for the chat. The default, NULL, will pick a reasonable default, and tell you about. We strongly recommend explicitly choosing a model for all but the most casual use.
api_args	Named list of arbitrary extra arguments appended to the body of every chat API call.
base_url	The base URL to the endpoint; the default uses OpenAI.
api_key	The API key to use for authentication. You generally should not supply this directly, but instead set the ANTHROPIC_API_KEY environment variable.
echo	One of the following options: none: don't emit any output (default when running in a function). text: echo text output as it streams in (default when running at the console). all: echo all input and output. Note this only affects the chat() method.

Value

A Chat object.

See Also

Other chatbots: chat_bedrock(), chat_cortex_analyst(), chat_databricks(), chat_deepseek(), chat_gemini(), chat_github(), chat_groq(), chat_ollama(), chat_openai(), chat_openrouter(), chat_perplexity()

Examples

chat <- chat_claude()
chat$chat("Tell me three jokes about statisticians")

ellmer documentation built on April 4, 2025, 3:53 a.m.