Anthropic Claude provider implementation.

Supports Claude models via the Anthropic Messages API.

Usage

# Basic usage
{:ok, response} = Nous.Providers.Anthropic.chat(%{
  model: "claude-sonnet-4-20250514",
  max_tokens: 1024,
  messages: [%{"role" => "user", "content" => "Hello"}]
})

# With system prompt
{:ok, response} = Nous.Providers.Anthropic.chat(%{
  model: "claude-sonnet-4-20250514",
  max_tokens: 1024,
  system: "You are a helpful assistant.",
  messages: [%{"role" => "user", "content" => "Hello"}]
})

# With long context beta
{:ok, response} = Nous.Providers.Anthropic.chat(
  params,
  enable_long_context: true
)

# Streaming
{:ok, stream} = Nous.Providers.Anthropic.chat_stream(params)
Enum.each(stream, fn event -> IO.inspect(event) end)

Configuration

# In config.exs
config :nous, :anthropic,
  api_key: "sk-ant-...",
  base_url: "https://api.anthropic.com"  # optional