Ruby SDK

bundle add anthropic

anthropic = Anthropic::Client.new(
  api_key: ENV["ANTHROPIC_API_KEY"] # This is the default and can be omitted
)

message = anthropic.messages.create(
  max_tokens: 1024,
  messages: [{role: "user", content: "Hello, Claude"}],
  model: :"claude-opus-5-5"
)

message.content.each do |block|
  puts block.text if block.type == :text
end

anthropic = Anthropic::Client.new
stream = anthropic.messages.stream(
  max_tokens: 1024,
  messages: [{role: "user", content: "Hello, Claude"}],
  model: :"claude-opus-5-5"
)

stream.each do |message|
  puts(message.type)
end

anthropic = Anthropic::Client.new
stream = anthropic.messages.stream(
  max_tokens: 1024,
  messages: [{role: :user, content: "Say hello there!"}],
  model: :"claude-opus-5-5"
)

stream.text.each do |text|
  print(text)
end

anthropic = Anthropic::Client.new
class CalculatorInput < Anthropic::BaseModel
  required :lhs, Float
  required :rhs, Float
  required :operator, Anthropic::InputSchema::EnumOf[:+, :-, :*, :/]
end

class Calculator < Anthropic::BaseTool
  input_schema CalculatorInput

  def call(expr)
    expr.lhs.public_send(expr.operator, expr.rhs)
  end
end

# ツール実行ループを自動的に処理します
anthropic.beta.messages.tool_runner(
  model: "claude-opus-5-5",
  max_tokens: 1024,
  messages: [{role: "user", content: "What's 15 * 7?"}],
  tools: [Calculator.new]
).each_message { |message| puts message.content }

anthropic = Anthropic::Client.new
begin
  message = anthropic.messages.create(
    max_tokens: 1024,
    messages: [{role: "user", content: "Hello, Claude"}],
    model: :"claude-opus-5-5"
  )
rescue Anthropic::Errors::APIConnectionError => e
  puts("The server could not be reached")
  puts(e.cause)  # an underlying Exception, likely raised within `net/http`
rescue Anthropic::Errors::RateLimitError => e
  puts("A 429 status code was received; we should back off a bit.")
rescue Anthropic::Errors::APIStatusError => e
  puts("Another non-200-range status code was received")
  puts(e.status)
end

# すべてのリクエストのデフォルトを設定します:
anthropic = Anthropic::Client.new(
  max_retries: 0 # default is 2
)

# または、リクエストごとに設定します:
anthropic.messages.create(
  max_tokens: 1024,
  messages: [{role: "user", content: "Hello, Claude"}],
  model: :"claude-opus-5-5",
  request_options: {max_retries: 5}
)

# すべてのリクエストのデフォルトを設定します:
anthropic = Anthropic::Client.new(
  timeout: 20 # 20 seconds (default is 10 minutes)
)

# または、リクエストごとに設定します:
anthropic.messages.create(
  max_tokens: 1024,
  messages: [{role: "user", content: "Hello, Claude"}],
  model: :"claude-opus-5-5",
  request_options: {timeout: 5}
)

anthropic = Anthropic::Client.new
page = anthropic.messages.batches.list(limit: 20)

# ページから単一のアイテムを取得します。
batch = page.data[0]
puts(batch.id)

# 必要に応じて追加のページを自動的に取得します。
page.auto_paging_each do |batch|
  puts(batch.id)
end

anthropic = Anthropic::Client.new
page = anthropic.messages.batches.list(limit: 20)
loop do
  page.data&.each { |batch| puts(batch.id) }
  break unless page.next_page?
  page = page.next_page
end

anthropic = Anthropic::Client.new
require "pathname"

# ファイル名を送信したり、大きなファイルをメモリに読み込むのを避けたりするには、`Pathname` を使用します:
file_metadata = anthropic.files.upload(file: Pathname("/path/to/file"))

# または、ファイルの内容や `StringIO` を直接渡すこともできます:
file_metadata = anthropic.files.upload(file: File.read("/path/to/file"))

# または、ファイル名やコンテンツタイプを指定するには:
file = Anthropic::FilePart.new(File.read("/path/to/file"), filename: "/path/to/file", content_type: "...")
file_metadata = anthropic.files.upload(file: file)

puts(file_metadata.id)

anthropic = Anthropic::Client.new
anthropic.messages.create(
  max_tokens: 1024,
  messages: [Anthropic::MessageParam.new(role: "user", content: "Hello, Claude")],
  model: :"claude-opus-5-5"
)

anthropic = Anthropic::Client.new
# ハッシュも使用できますが、型安全ではありません:
anthropic.messages.create(
  max_tokens: 1024,
  messages: [{role: "user", content: "Hello, Claude"}],
  model: :"claude-opus-5-5"
)

# Params クラス全体を splat（展開）して渡すこともできます:
params = Anthropic::MessageCreateParams.new(
  max_tokens: 1024,
  messages: [Anthropic::MessageParam.new(role: "user", content: "Hello, Claude")],
  model: :"claude-opus-5-5"
)
anthropic.messages.create(**params)

# :auto
puts(Anthropic::MessageCreateParams::ServiceTier::AUTO)

# 推論される型: `T.all(Anthropic::MessageCreateParams::ServiceTier, Symbol)`
T.reveal_type(Anthropic::MessageCreateParams::ServiceTier::AUTO)

anthropic = Anthropic::Client.new
# enum 定数を使用すると、タグ付き型の情報が保持されます:
anthropic.messages.create(
  max_tokens: 1024,
  messages: [{role: "user", content: "Hello, Claude"}],
  model: Anthropic::Model::CLAUDE_OPUS_5_5,
  service_tier: Anthropic::MessageCreateParams::ServiceTier::AUTO
)

# リテラル値も使用できます:
anthropic.messages.create(
  max_tokens: 1024,
  messages: [{role: "user", content: "Hello, Claude"}],
  model: :"claude-opus-5-5",
  service_tier: :auto
)

anthropic = Anthropic::Client.new
value = "example"
message =
  anthropic.messages.create(
    max_tokens: 1024,
    messages: [{role: "user", content: "Hello, Claude"}],
    model: :"claude-opus-5-5",
    request_options: {
      extra_query: {my_query_parameter: value},
      extra_body: {my_body_parameter: value},
      extra_headers: {"my-header": value}
    }
  )

puts(message[:my_undocumented_property])

response = anthropic.request(
  method: :post,
  path: '/undocumented/endpoint',
  query: {"dog": "woof"},
  headers: {"useful-header": "interesting-value"},
  body: {"hello": "world"}
)