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2222 <HomeQuickChip icon="CodeBrackets" href="https://platform.claude.com/docs/en/api/overview">
2323 API reference
2424 </HomeQuickChip>
25
26 ```python Python
27 import anthropic
28
29 client = anthropic.Anthropic()
30
31 message = client.messages.create(
32 model="claude-opus-5-5",
33 max_tokens=1024,
34 messages=[
35 {
36 "role": "user",
37 "content": "Hello, Claude",
38 }
39 ],
40 )
41 for block in message.content:
42 if block.type == "text":
43 print(block.text)
44 ```
45
46 ```typescript TypeScript
47 import Anthropic from "@anthropic-ai/sdk";
48
49 const client = new Anthropic();
50
51 const msg = await client.messages.create({
52 model: "claude-opus-5-5",
53 max_tokens: 1024,
54 messages: [
55 {
56 role: "user",
57 content: "Hello, Claude"
58 }
59 ]
60 });
61 for (const block of msg.content) {
62 if (block.type === "text") {
63 console.log(block.text);
64 }
65 }
66 ```
67
68 ```go Go
69 import "github.com/anthropics/anthropic-sdk-go"
70
71 client := anthropic.NewClient()
72 msg, _ := client.Messages.New(
73 context.TODO(),
74 anthropic.MessageNewParams{
75 Model: anthropic.ModelClaudeOpus5_5,
76 MaxTokens: 1024,
77 Messages: []anthropic.MessageParam{
78 anthropic.NewUserMessage(
79 anthropic.NewTextBlock("Hello, Claude"),
80 ),
81 },
82 },
83 )
84 for _, block := range msg.Content {
85 if textBlock, ok := block.AsAny().(anthropic.TextBlock); ok {
86 fmt.Println(textBlock.Text)
87 }
88 }
89 ```
90
91 ```java Java
92 import com.anthropic.client.okhttp.AnthropicOkHttpClient;
93
94 var client = AnthropicOkHttpClient
95 .fromEnv();
96
97 var msg = client.messages().create(
98 MessageCreateParams.builder()
99 .model("claude-opus-5-5")
100 .maxTokens(1024)
101 .addUserMessage("Hello, Claude")
102 .build()
103 );
104 for (var block : msg.content()) {
105 block.text().ifPresent(
106 textBlock -> System.out.println(textBlock.text()));
107 }
108 ```
109
110 ```ruby Ruby
111 require "anthropic"
112
113 client = Anthropic::Client.new
114
115 msg = client.messages.create(
116 model: "claude-opus-5-5",
117 max_tokens: 1024,
118 messages: [{
119 role: "user",
120 content: "Hello, Claude"
121 }]
122 )
123 msg.content.each do |block|
124 puts block.text if block.type == :text
125 end
126 ```
127
128 ```php PHP
129 use Anthropic\Client;
130
131 $client = new Client();
132
133 $message = $client->messages->create(
134 model: "claude-opus-5-5",
135 maxTokens: 1024,
136 messages: [['role' => 'user',
137 'content' => 'Hello, Claude']],
138 );
139 foreach ($message->content as $block) {
140 if ($block->type === 'text') {
141 echo $block->text, PHP_EOL;
142 }
143 }
144 ```
145
146 ```csharp C#
147 using Anthropic;
148
149 var client = new AnthropicClient();
150
151 var msg = await client.Messages
152 .Create(new() {
153 Model = "claude-opus-5-5",
154 MaxTokens = 1024,
155 Messages = [new() {
156 Role = Role.User,
157 Content = "Hello, Claude"
158 }]
159 });
160 foreach (var block in msg.Content)
161 {
162 if (block.TryPickText(out var textBlock))
163 {
164 Console.WriteLine(textBlock.Text);
165 }
166 }
167 ```
168
169 ```bash cURL
170 curl https://api.anthropic.com/v1/messages \
171 -H "content-type: application/json" \
172 -H "x-api-key: $ANTHROPIC_API_KEY" \
173 -H "anthropic-version: 2023-06-01" \
174 -d '{
175 "model": "claude-opus-5-5",
176 "max_tokens": 1024,
177 "messages": [{
178 "role": "user",
179 "content": "Hello, Claude"
180 }]
181 }'
182 ```
183
184 ```bash CLI
185 ant messages create \
186 --model claude-opus-5-5 \
187 --max-tokens 1024 \
188 --message '{
189 role: user,
190 content: "Hello, Claude"
191 }'
192 ```
25193 </HomeHero>
26194
27195 <HomeSection>
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