Anthropic

When using Anthropic models, llm-exe will make POST requests to https://api.anthropic.com/v1/messages.

Setup

Anthropic Chat

const llm = useLlm("anthropic.chat.v1", {
  model: "claude-sonnet-4-6", // specify a model
});

Anthropic Chat By Model

const llm = useLlm("anthropic.claude-sonnet-4-6", {
  // other options,
  // no model needed, using claude-sonnet-4-6
});

INFO

You can use the following models using this shorthand:

• anthropic.claude-opus-4-6
• anthropic.claude-sonnet-4-6
• anthropic.claude-sonnet-4
• anthropic.claude-opus-4
• anthropic.claude-3-7-sonnet
• anthropic.claude-3-5-sonnet
• anthropic.claude-3-5-haiku

Authentication

To authenticate, you need to provide an Anthropic API Key. You can either provide the API key various ways, depending on your use case.

• Pass in as execute options using anthropicApiKey
• Pass in as setup options using anthropicApiKey
• Use a default key by setting an environment variable of ANTHROPIC_API_KEY

Basic Usage

Generally you pass the LLM instance off to an LLM Executor and call that. However, it is possible to interact with the LLM object directly, if you wanted.

// given array of chat messages, calls chat completion
await llm.call([]);

// given string prompt, calls completion
await llm.call("");

Anthropic-Specific Options

Option	Type	Default	Description
anthropicApiKey	string	undefined	API key for Anthropic. Optionally can be set using process.env.ANTHROPIC_API_KEY
model	string	—	The model to use. Must be specified when using anthropic.chat.v1.
temperature	number	undefined	Maps to temperature. See Anthropic Docs
maxTokens	number	4096	Maps to max_tokens. See Anthropic Docs
topP	number	undefined	Maps to top_p. See Anthropic Docs
topK	number	undefined	Maps to top_k. See Anthropic Docs
stopSequences	array	undefined	Maps to stop_sequences. See Anthropic Docs
stream	boolean	undefined	Note: Not supported yet.
metadata	object	undefined	Maps to metadata. See Anthropic Docs
serviceTier	string	undefined	Maps to service_tier. See Anthropic Docs

Anthropic Docs: link