SDK de Cliente - Claude Docs

Se requiere configuración adicional para usar los SDK de Cliente de Anthropic a través de una plataforma asociada. Si está utilizando Amazon Bedrock, consulte esta guía; si está utilizando Google Cloud Vertex AI, consulte esta guía.

Python

Repositorio de GitHub de la biblioteca de Python Ejemplo:

Python

import anthropic

client = anthropic.Anthropic(
    # defaults to os.environ.get("ANTHROPIC_API_KEY")
    api_key="my_api_key",
)
message = client.messages.create(
    model="claude-sonnet-4-5",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello, Claude"}
    ]
)
print(message.content)

Cadenas model aceptadas:

# Claude 4 Models
"claude-opus-4-1-20250805"
"claude-opus-4-1"  # alias
"claude-opus-4-20250514"
"claude-opus-4-0"  # alias
"claude-sonnet-4-5-20250929"
"claude-sonnet-4-5"  # alias
"claude-sonnet-4-20250514"
"claude-sonnet-4-0"  # alias
"claude-haiku-4-5-20251001"
"claude-haiku-4-5"  # alias

# Claude 3.7 Models
"claude-3-7-sonnet-20250219" # deprecated
"claude-3-7-sonnet-latest"  # alias

# Claude 3.5 Models
"claude-3-5-haiku-20241022"
"claude-3-5-haiku-latest"  # alias

# Claude 3 Models
"claude-3-opus-20240229"  # deprecated
"claude-3-opus-latest"  # alias
"claude-3-haiku-20240307"

TypeScript

Repositorio de GitHub de la biblioteca de TypeScript

Aunque esta biblioteca está en TypeScript, también se puede usar en bibliotecas de JavaScript.

Ejemplo:

TypeScript

import Anthropic from '@anthropic-ai/sdk';

const anthropic = new Anthropic({
  apiKey: 'my_api_key', // defaults to process.env["ANTHROPIC_API_KEY"]
});

const msg = await anthropic.messages.create({
  model: "claude-sonnet-4-5",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello, Claude" }],
});
console.log(msg);

Cadenas model aceptadas:

// Claude 4 Models
"claude-opus-4-1-20250805"
"claude-opus-4-1"  // alias
"claude-opus-4-20250514"
"claude-opus-4-0"  // alias
"claude-sonnet-4-5-20250929"
"claude-sonnet-4-5"  // alias
"claude-sonnet-4-20250514"
"claude-sonnet-4-0"  // alias
"claude-haiku-4-5-20251001"
"claude-haiku-4-5"  // alias

// Claude 3.7 Models
"claude-3-7-sonnet-20250219"  // deprecated
"claude-3-7-sonnet-latest"  // alias

// Claude 3.5 Models
"claude-3-5-haiku-20241022"
"claude-3-5-haiku-latest"  // alias

// Claude 3 Models
"claude-3-opus-20240229"  // deprecated
"claude-3-opus-latest"  // alias
"claude-3-haiku-20240307"

Java

Repositorio de GitHub de la biblioteca de Java Ejemplo:

Java

import com.anthropic.models.Message;
import com.anthropic.models.MessageCreateParams;
import com.anthropic.models.Model;

MessageCreateParams params = MessageCreateParams.builder()
    .maxTokens(1024L)
    .addUserMessage("Hello, Claude")
    .model(Model.CLAUDE_SONNET_4_0)
    .build();
Message message = client.messages().create(params);

Valores de enumeración model:

// Claude 4 Models
Model.CLAUDE_OPUS_4_1
Model.CLAUDE_OPUS_4_1_20250805
Model.CLAUDE_OPUS_4_0
Model.CLAUDE_OPUS_4_20250514
Model.CLAUDE_SONNET_4_5_20250929
Model.CLAUDE_SONNET_4_5
Model.CLAUDE_SONNET_4_20250514
Model.CLAUDE_SONNET_4_0
Model.CLAUDE_HAIKU_4_5_20251001
Model.CLAUDE_HAIKU_4_5

// Claude 3.7 Models
Model.CLAUDE_3_7_SONNET_LATEST  // alias
Model.CLAUDE_3_7_SONNET_20250219  // deprecated

// Claude 3.5 Models
Model.CLAUDE_3_5_HAIKU_LATEST
Model.CLAUDE_3_5_HAIKU_20241022

// Claude 3 Models
Model.CLAUDE_3_OPUS_LATEST
Model.CLAUDE_3_OPUS_20240229  // deprecated
Model.CLAUDE_3_HAIKU_20240307

Go

Repositorio de GitHub de la biblioteca de Go Ejemplo:

package main

import (
	"context"
	"fmt"
	"github.com/anthropics/anthropic-sdk-go/option"

	"github.com/anthropics/anthropic-sdk-go"
)

func main() {
	client := anthropic.NewClient(
		option.WithAPIKey("my-anthropic-api-key"),
	)

	message, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{
		Model:     anthropic.ModelClaudeSonnet4_0,
		MaxTokens: 1024,
		Messages: []anthropic.MessageParam{
			anthropic.NewUserMessage(anthropic.NewTextBlock("What is a quaternion?")),
		},
	})
	if err != nil {
		fmt.Printf("Error creating message: %v\n", err)
		return
	}

	fmt.Printf("%+v\n", message.Content)
}

Constantes Model:

// Claude 4 Models
anthropic.ModelClaudeOpus4_1
anthropic.ModelClaudeOpus4_1_20250805
anthropic.ModelClaudeOpus4_0
anthropic.ModelClaudeOpus4_20250514
anthropic.ModelClaudeSonnet4_5_20250929
anthropic.ModelClaudeSonnet4_5
anthropic.ModelClaudeSonnet4_20250514
anthropic.ModelClaudeSonnet4_0
anthropic.ModelClaudeHaiku4_5_20251001
anthropic.ModelClaudeHaiku4_5

// Claude 3.7 Models
anthropic.ModelClaude3_7SonnetLatest  // alias
anthropic.ModelClaude3_7Sonnet20250219  // deprecated

// Claude 3.5 Models
anthropic.ModelClaude3_5HaikuLatest
anthropic.ModelClaude3_5Haiku20241022

// Claude 3 Models
anthropic.ModelClaude3OpusLatest
anthropic.ModelClaude_3_Opus_20240229  // deprecated
anthropic.ModelClaude_3_Haiku_20240307

C#

Repositorio de GitHub de la biblioteca de C#

El SDK de C# está actualmente en versión beta.

Ejemplo:

using System;
using Anthropic;
using Anthropic.Models.Messages;
using Anthropic.Models.Messages.MessageParamProperties;

// Uses ANTHROPIC_API_KEY environment variable by default
AnthropicClient client = new();

MessageCreateParams parameters = new()
{
    MaxTokens = 1024,
    Messages =
    [
        new()
        {
            Role = Role.User,
            Content = "Hello, Claude",
        },
    ],
    Model = Model.ClaudeSonnet4_0,
};

var message = await client.Messages.Create(parameters);

Console.WriteLine(message);

Valores de Model:

// Claude 4 Models
Model.ClaudeOpus4_1_20250805
Model.ClaudeOpus4_0  // alias
Model.ClaudeOpus4_20250514
Model.Claude4Opus20250514  // alias
Model.ClaudeSonnet4_5_20250929
Model.ClaudeSonnet4_5  // alias
Model.ClaudeSonnet4_20250514
Model.ClaudeSonnet4_0  // alias
Model.Claude4Sonnet20250514  // alias
Model.ClaudeHaiku4_5_20251001
Model.ClaudeHaiku4_5  // alias

// Claude 3.7 Models
Model.Claude3_7SonnetLatest  // alias
Model.Claude3_7Sonnet20250219  // deprecated

// Claude 3.5 Models
Model.Claude3_5HaikuLatest  // alias
Model.Claude3_5Haiku20241022

// Claude 3 Models
Model.Claude3OpusLatest  // alias
Model.Claude_3_Opus_20240229  // deprecated
Model.Claude_3_Haiku_20240307

Ruby

Repositorio de GitHub de la biblioteca de Ruby Ejemplo:

ruby

require "bundler/setup"
require "anthropic"

anthropic = Anthropic::Client.new(
  api_key: "my_api_key" # defaults to ENV["ANTHROPIC_API_KEY"]
)

message =
  anthropic.messages.create(
    max_tokens: 1024,
    messages: [{
      role: "user",
      content: "Hello, Claude"
    }],
    model: "claude-sonnet-4-5"
  )

puts(message.content)

Cadenas model aceptadas:

# Claude 4 Models
:"claude-opus-4-1-20250805"
:"claude-opus-4-1"  # alias
:"claude-opus-4-20250514"
:"claude-opus-4-0"  # alias
:"claude-sonnet-4-5-20250929"
:"claude-sonnet-4-5"  # alias
:"claude-sonnet-4-20250514"
:"claude-sonnet-4-0"  # alias
:"claude-haiku-4-5-20251001"
:"claude-haiku-4-5"  # alias

# Claude 3.7 Models
:"claude-3-7-sonnet-20250219"  # deprecated
:"claude-3-7-sonnet-latest"  # alias

# Claude 3.5 Models
:"claude-3-5-haiku-20241022"
:"claude-3-5-haiku-latest"  # alias

# Claude 3 Models
:"claude-3-opus-20240229"  # deprecated
:"claude-3-opus-latest"  # alias
:"claude-3-haiku-20240307"

PHP

Repositorio de GitHub de la biblioteca de PHP

El SDK de PHP está actualmente en versión beta.

Ejemplo:

PHP

<?php

use Anthropic\Client;
use Anthropic\Messages\MessageParam;

$client = new Client(
  apiKey: getenv("ANTHROPIC_API_KEY") ?: "my-anthropic-api-key"
);

$message = $client->messages->create(
  maxTokens: 1024,
  messages: [MessageParam::with(role: "user", content: "Hello, Claude")],
  model: "claude-sonnet-4-5",
);
var_dump($message->content);

Cadenas model aceptadas:

// Claude 4 Models
"claude-opus-4-1-20250805"
"claude-opus-4-1"  // alias
"claude-opus-4-20250514"
"claude-opus-4-0"  // alias
"claude-sonnet-4-5-20250929"
"claude-sonnet-4-5"  // alias
"claude-sonnet-4-20250514"
"claude-sonnet-4-0"  // alias
"claude-haiku-4-5-20251001"
"claude-haiku-4-5"  // alias

// Claude 3.7 Models
"claude-3-7-sonnet-20250219"  // deprecated
"claude-3-7-sonnet-latest"  // alias

// Claude 3.5 Models
"claude-3-5-haiku-20241022"
"claude-3-5-haiku-latest"  // alias

// Claude 3 Models
"claude-3-opus-20240229"  // deprecated
"claude-3-opus-latest"  // alias
"claude-3-haiku-20240307"

Constantes Model:

// Claude 4 Models
Model::CLAUDE_OPUS_4_1_20250805
Model::CLAUDE_OPUS_4_0  // alias
Model::CLAUDE_OPUS_4_20250514
Model::CLAUDE_SONNET_4_5_20250929
Model::CLAUDE_SONNET_4_5  // alias
Model::CLAUDE_SONNET_4_20250514
Model::CLAUDE_SONNET_4_0  // alias
Model::CLAUDE_HAIKU_4_5_20251001
Model::CLAUDE_HAIKU_4_5  // alias

// Claude 3.7 Models
Model::CLAUDE_3_7_SONNET_LATEST  // alias
Model::CLAUDE_3_7_SONNET_20250219  // deprecated

// Claude 3.5 Models
Model::CLAUDE_3_5_HAIKU_LATEST  // alias
Model::CLAUDE_3_5_HAIKU_20241022

// Claude 3 Models
Model::CLAUDE_3_OPUS_LATEST  // alias
Model::CLAUDE_3_OPUS_20240229  // deprecated
Model::CLAUDE_3_HAIKU_20240307

Espacio de nombres beta en SDK de cliente

Cada SDK tiene un espacio de nombres beta que está disponible. Se utiliza para nuevas características que Anthropic lanza en una versión beta. Utilice esto junto con encabezados beta para usar estas características.

import anthropic

client = anthropic.Anthropic(
    # defaults to os.environ.get("ANTHROPIC_API_KEY")
    api_key="my_api_key",
)
message = client.beta.messages.create(
    model="claude-sonnet-4-5",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello, Claude"}
    ],
    betas=["beta-feature-name"]
)
print(message.content)

​Python

​TypeScript

​Java

​Go

​C#

​Ruby

​PHP

​Espacio de nombres beta en SDK de cliente

Python

TypeScript

Java

Go

C#

Ruby

PHP

Espacio de nombres beta en SDK de cliente