--- title: Dokumentation url: https://platform.claude.com/docs/de/home description: Claude API-Dokumentation --- Schnellstart API-Key erhalten API-Referenz ```python Python import anthropic client = anthropic.Anthropic() message = client.messages.create( model="claude-opus-5-5", max_tokens=1024, messages=[ { "role": "user", "content": "Hello, Claude", } ], ) for block in message.content: if block.type == "text": print(block.text) ``` ```typescript TypeScript import Anthropic from "@anthropic-ai/sdk"; const client = new Anthropic(); const msg = await client.messages.create({ model: "claude-opus-5-5", max_tokens: 1024, messages: [ { role: "user", content: "Hello, Claude" } ] }); for (const block of msg.content) { if (block.type === "text") { console.log(block.text); } } ``` ```go Go import "github.com/anthropics/anthropic-sdk-go" client := anthropic.NewClient() msg, _ := client.Messages.New( context.TODO(), anthropic.MessageNewParams{ Model: anthropic.ModelClaudeOpus5_5, MaxTokens: 1024, Messages: []anthropic.MessageParam{ anthropic.NewUserMessage( anthropic.NewTextBlock("Hello, Claude"), ), }, }, ) for _, block := range msg.Content { if textBlock, ok := block.AsAny().(anthropic.TextBlock); ok { fmt.Println(textBlock.Text) } } ``` ```java Java import com.anthropic.client.okhttp.AnthropicOkHttpClient; var client = AnthropicOkHttpClient .fromEnv(); var msg = client.messages().create( MessageCreateParams.builder() .model(Model.CLAUDE_OPUS_5_5) .maxTokens(1024) .addUserMessage("Hello, Claude") .build() ); for (var block : msg.content()) { block.text().ifPresent( textBlock -> System.out.println(textBlock.text())); } ``` ```ruby Ruby require "anthropic" client = Anthropic::Client.new msg = client.messages.create( model: "claude-opus-5-5", max_tokens: 1024, messages: [{ role: "user", content: "Hello, Claude" }] ) msg.content.each do |block| puts block.text if block.type == :text end ``` ```php PHP use Anthropic\Client; $client = new Client(); $message = $client->messages->create( model: "claude-opus-5-5", maxTokens: 1024, messages: [['role' => 'user', 'content' => 'Hello, Claude']], ); foreach ($message->content as $block) { if ($block->type === 'text') { echo $block->text, PHP_EOL; } } ``` ```csharp C# using Anthropic; var client = new AnthropicClient(); var msg = await client.Messages .Create(new() { Model = Model.ClaudeOpus5_5, MaxTokens = 1024, Messages = [new() { Role = Role.User, Content = "Hello, Claude" }] }); foreach (var block in msg.Content) { if (block.TryPickText(out var textBlock)) { Console.WriteLine(textBlock.Text); } } ``` ```bash cURL curl https://api.anthropic.com/v1/messages \ -H "content-type: application/json" \ -H "x-api-key: $ANTHROPIC_API_KEY" \ -H "anthropic-version: 2023-06-01" \ -d '{ "model": "claude-opus-5-5", "max_tokens": 1024, "messages": [{ "role": "user", "content": "Hello, Claude" }] }' ``` ```bash CLI ant messages create \ --model claude-opus-5-5 \ --max-tokens 1024 \ --message '{ role: user, content: "Hello, Claude" }' ``` Schnellstart API-Referenz Client-SDKs Schnellstart API-Referenz Definiere deinen Agenten Amazon Bedrock Google Cloud Microsoft Foundry Schnellstart API-Key holen Ein Modell wählen Ein SDK installieren Die API im Playground ausprobieren Messages API Nachdenken Vision Tool-Nutzung Websuche Code-Ausführung Strukturierte Ausgaben Prompt-Caching Streaming Best Practices für Prompting Evals ausführen Batch-Tests Sicherheit und Schutzmaßnahmen Ratenlimits und Fehler Kostenoptimierung Workspaces und Administration API-Key-Verwaltung Nutzungsüberwachung Modellmigration Schnellstart API-Key holen In der Console entwickeln Agenten-Einrichtung Tools Tool-Berechtigungen Streaming und Ereignisse Sessions-API-Referenz Workspaces und Administration API-Key-Verwaltung Nutzungsüberwachung * [Claude Fable 5.1](https://platform.claude.com/docs/de/models/fable-5-1/overview) (`claude-fable-5-1`) — New — *For demanding reasoning and long-horizon agentic work* — Most capable · Research · Multi-day tasks * [Claude Opus 5.5](https://platform.claude.com/docs/de/models/opus-5-5/overview) (`claude-opus-5-5`) — New — *For long-running agentic coding and knowledge work* — Complex projects · Agents · Coding * [Claude Sonnet 5.5](https://platform.claude.com/docs/de/models/sonnet-5-5/overview) (`claude-sonnet-5-5`) — New — *The best combination of speed and intelligence* — Everyday tasks · Writing · Cost-efficient * [Claude Haiku 5.5](https://platform.claude.com/docs/de/models/haiku-5-5/overview) (`claude-haiku-5-5`) — New — *For high-volume, latency-sensitive tasks such as classification, extraction, and routing* — Fastest · Lowest cost · High volume Interaktive Kurse, um Claude zu meistern. Codebeispiele und Muster. Bereitstellbare Starter-Apps. Neueste Funktionen und Updates. Ein agentischer Coding-Assistent in deinem Terminal.