The whole hunk
from line 34, old and new numbered
/
lines
from line 34
3434 -H "anthropic-beta: context-management-2025-06-27" \
3535 -H "content-type: application/json" \
3636 -d '{
37 "model": "claude-opus-5",
37 "model": "claude-opus-5-5",
3838 "max_tokens": 1024,
3939 "messages": [
4040 {"role": "user", "content": "Hello, Claude"}
from line 45
4545 ```bash CLI
4646 ant beta:messages create \
4747 --beta context-management-2025-06-27 \
48 --model claude-opus-5 \
48 --model claude-opus-5-5 \
4949 --max-tokens 1024 \
5050 --message '{role: user, content: "Hello, Claude"}'
5151 ```
from line 54
5454 client = Anthropic()
5555
5656 response = client.beta.messages.create(
57 model="claude-opus-5",
57 model="claude-opus-5-5",
5858 max_tokens=1024,
5959 messages=[{"role": "user", "content": "Hello, Claude"}],
6060 betas=["context-management-2025-06-27"],
from line 67
6767 const client = new Anthropic();
6868
6969 const msg = await client.beta.messages.create({
70 model: "claude-opus-5",
70 model: "claude-opus-5-5",
7171 max_tokens: 1024,
7272 messages: [{ role: "user", content: "Hello, Claude" }],
7373 betas: ["context-management-2025-06-27"]
from line 82
8282 var message = await client.Beta.Messages.Create(
8383 new MessageCreateParams
8484 {
85 Model = "claude-opus-5",
85 Model = "claude-opus-5-5",
8686 MaxTokens = 1024,
8787 Messages = [new() { Role = Role.User, Content = "Hello, Claude" }],
8888 Betas = ["context-management-2025-06-27"],
from line 96
9696 client := anthropic.NewClient()
9797
9898 message, err := client.Beta.Messages.New(context.TODO(), anthropic.BetaMessageNewParams{
99 Model: anthropic.ModelClaudeOpus5,
99 Model: anthropic.ModelClaudeOpus5_5,
100100 MaxTokens: 1024,
101101 Messages: []anthropic.BetaMessageParam{
102102 anthropic.NewBetaUserMessage(anthropic.NewBetaTextBlock("Hello, Claude")),
from line 114
114114 AnthropicClient client = AnthropicOkHttpClient.fromEnv();
115115
116116 MessageCreateParams params = MessageCreateParams.builder()
117 .model(Model.CLAUDE_OPUS_5)
117 .model(Model.CLAUDE_OPUS_5_5)
118118 .maxTokens(1024)
119119 .addUserMessage("Hello, Claude")
120120 .addBeta(AnthropicBeta.CONTEXT_MANAGEMENT_2025_06_27)
from line 130
130130 $message = $client->beta->messages->create(
131131 maxTokens: 1024,
132132 messages: [['role' => 'user', 'content' => 'Hello, Claude']],
133 model: 'claude-opus-5',
133 model: 'claude-opus-5-5',
134134 betas: ['context-management-2025-06-27'],
135135 );
136136
from line 141
141141 client = Anthropic::Client.new
142142
143143 message = client.beta.messages.create(
144 model: "claude-opus-5",
144 model: "claude-opus-5-5",
145145 max_tokens: 1024,
146146 messages: [{role: "user", content: "Hello, Claude"}],
147147 betas: ["context-management-2025-06-27"]