The whole hunk
from line 31, old and new numbered
/
lines
from line 31
3131 -H "anthropic-version: 2023-06-01" \
3232 -H "content-type: application/json" \
3333 -d '{
34 "model": "claude-opus-5",
34 "model": "claude-opus-5-5",
3535 "max_tokens": 1024,
3636 "messages": [
3737 {"role": "user", "content": "Hello, Claude"}
from line 41
4141
4242 ```bash CLI
4343 ant messages create \
44 --model claude-opus-5 \
44 --model claude-opus-5-5 \
4545 --max-tokens 1024 \
4646 --message '{role: user, content: "Hello, Claude"}'
4747 ```
from line 48
4848
4949 ```python Python
5050 message = anthropic.Anthropic().messages.create(
51 model="claude-opus-5",
51 model="claude-opus-5-5",
5252 max_tokens=1024,
5353 messages=[{"role": "user", "content": "Hello, Claude"}],
5454 )
from line 59
5959 const anthropic = new Anthropic();
6060
6161 const message = await anthropic.messages.create({
62 model: "claude-opus-5",
62 model: "claude-opus-5-5",
6363 max_tokens: 1024,
6464 messages: [{ role: "user", content: "Hello, Claude" }]
6565 });
from line 71
7171
7272 var parameters = new MessageCreateParams
7373 {
74 Model = Model.ClaudeOpus5,
74 Model = Model.ClaudeOpus5_5,
7575 MaxTokens = 1024,
7676 Messages = [new() { Role = Role.User, Content = "Hello, Claude" }]
7777 };
from line 83
8383 client := anthropic.NewClient()
8484
8585 response, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{
86 Model: anthropic.ModelClaudeOpus5,
86 Model: anthropic.ModelClaudeOpus5_5,
8787 MaxTokens: 1024,
8888 Messages: []anthropic.MessageParam{
8989 anthropic.NewUserMessage(anthropic.NewTextBlock("Hello, Claude")),
from line 99
9999 AnthropicClient client = AnthropicOkHttpClient.fromEnv();
100100
101101 MessageCreateParams params = MessageCreateParams.builder()
102 .model(Model.CLAUDE_OPUS_5)
102 .model(Model.CLAUDE_OPUS_5_5)
103103 .maxTokens(1024L)
104104 .addUserMessage("Hello, Claude")
105105 .build();
from line 114
114114 $message = $client->messages->create(
115115 maxTokens: 1024,
116116 messages: [['role' => 'user', 'content' => 'Hello, Claude']],
117 model: 'claude-opus-5',
117 model: 'claude-opus-5-5',
118118 );
119119 echo json_encode($message, JSON_PRETTY_PRINT), PHP_EOL;
120120 ```
from line 123
123123 client = Anthropic::Client.new
124124
125125 message = client.messages.create(
126 model: "claude-opus-5",
126 model: "claude-opus-5-5",
127127 max_tokens: 1024,
128128 messages: [
129129 { role: "user", content: "Hello, Claude" }
from line 144
144144 "text": "Hello!"
145145 }
146146 ],
147 "model": "claude-opus-5",
147 "model": "claude-opus-5-5",
148148 "stop_reason": "end_turn",
149149 "stop_sequence": null,
150150 "usage": {
from line 168
168168 -H "anthropic-version: 2023-06-01" \
169169 -H "content-type: application/json" \
170170 -d '{
171 "model": "claude-opus-5",
171 "model": "claude-opus-5-5",
172172 "max_tokens": 1024,
173173 "messages": [
174174 {"role": "user", "content": "Hello, Claude"},
from line 181
181181
182182 ```bash CLI
183183 ant messages create \
184 --model claude-opus-5 \
184 --model claude-opus-5-5 \
185185 --max-tokens 1024 \
186186 --message '{role: user, content: "Hello, Claude"}' \
187187 --message '{role: assistant, content: "Hello!"}' \
from line 190
190190
191191 ```python Python
192192 message = anthropic.Anthropic().messages.create(
193 model="claude-opus-5",
193 model="claude-opus-5-5",
194194 max_tokens=1024,
195195 messages=[
196196 {"role": "user", "content": "Hello, Claude"},
from line 205
205205 const anthropic = new Anthropic();
206206
207207 const message = await anthropic.messages.create({
208 model: "claude-opus-5",
208 model: "claude-opus-5-5",
209209 max_tokens: 1024,
210210 messages: [
211211 { role: "user", content: "Hello, Claude" },
from line 221
221221
222222 var parameters = new MessageCreateParams
223223 {
224 Model = Model.ClaudeOpus5,
224 Model = Model.ClaudeOpus5_5,
225225 MaxTokens = 1024,
226226 Messages =
227227 [
from line 239
239239 client := anthropic.NewClient()
240240
241241 response, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{
242 Model: anthropic.ModelClaudeOpus5,
242 Model: anthropic.ModelClaudeOpus5_5,
243243 MaxTokens: 1024,
244244 Messages: []anthropic.MessageParam{
245245 anthropic.NewUserMessage(anthropic.NewTextBlock("Hello, Claude")),
from line 257
257257 AnthropicClient client = AnthropicOkHttpClient.fromEnv();
258258
259259 MessageCreateParams params = MessageCreateParams.builder()
260 .model(Model.CLAUDE_OPUS_5)
260 .model(Model.CLAUDE_OPUS_5_5)
261261 .maxTokens(1024L)
262262 .addUserMessage("Hello, Claude")
263263 .addAssistantMessage("Hello!")
from line 278
278278 ['role' => 'assistant', 'content' => 'Hello!'],
279279 ['role' => 'user', 'content' => 'Can you describe LLMs to me?'],
280280 ],
281 model: 'claude-opus-5',
281 model: 'claude-opus-5-5',
282282 );
283283
284284 echo json_encode($message, JSON_PRETTY_PRINT), PHP_EOL;
from line 288
288288 client = Anthropic::Client.new
289289
290290 message = client.messages.create(
291 model: "claude-opus-5",
291 model: "claude-opus-5-5",
292292 max_tokens: 1024,
293293 messages: [
294294 { role: "user", content: "Hello, Claude" },
from line 311
311311 "text": "Sure, I'd be happy to provide..."
312312 }
313313 ],
314 "model": "claude-opus-5",
314 "model": "claude-opus-5-5",
315315 "stop_reason": "end_turn",
316316 "stop_sequence": null,
317317 "usage": {
from line 323
323323
324324### System role in messages
325325
326On Claude Fable 5.1, [Claude Mythos 5.1](https://anthropic.com/glasswing), Claude Fable 5, [Claude Mythos 5](https://anthropic.com/glasswing), Claude Opus 4.8, and Claude Opus 5, you can include messages with `"role": "system"` after a user turn (subject to [placement rules](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages#limitations)) to add a new system instruction partway through a conversation. A `system` message cannot be the first entry in `messages`. Use the top-level `system` field for instructions that apply from the start.
326On Claude Fable 5.1, [Claude Mythos 5.1](https://anthropic.com/glasswing), Claude Fable 5, [Claude Mythos 5](https://anthropic.com/glasswing), Claude Opus 5.5, Claude Opus 4.8, and Claude Opus 5, you can include messages with `"role": "system"` after a user turn (subject to [placement rules](https://platform.claude.com/docs/en/build-with-claude/mid-conversation-system-messages#limitations)) to add a new system instruction partway through a conversation. A `system` message cannot be the first entry in `messages`. Use the top-level `system` field for instructions that apply from the start.
327327
328328A mid-conversation system message has the same authority as the top-level `system` field, but because it is appended to the end of the message history, it does not invalidate any cached prefix that came before it. Use the top-level `system` field for instructions that should apply from the very first turn, and a mid-conversation system message for instructions that only become relevant later.
329329
from line 518
518518 -H "content-type: application/json" \
519519 -d @- <<EOF
520520 {
521 "model": "claude-opus-5",
521 "model": "claude-opus-5-5",
522522 "max_tokens": 1024,
523523 "messages": [
524524 {"role": "user", "content": [
from line 539
539539 -H "anthropic-version: 2023-06-01" \
540540 -H "content-type: application/json" \
541541 -d '{
542 "model": "claude-opus-5",
542 "model": "claude-opus-5-5",
543543 "max_tokens": 1024,
544544 "messages": [
545545 {"role": "user", "content": [
from line 560
560560 curl -s "$IMAGE_URL" -o ./vision-example.jpg
561561
562562 ant messages create <<'YAML'
563 model: claude-opus-5
563 model: claude-opus-5-5
564564 max_tokens: 1024
565565 messages:
566566 - role: user
from line 576
576576
577577 # Option 2: URL-referenced image
578578 ant messages create <<YAML
579 model: claude-opus-5
579 model: claude-opus-5-5
580580 max_tokens: 1024
581581 messages:
582582 - role: user
from line 600
600600 image_data = base64.standard_b64encode(httpx2.get(image_url).content).decode("utf-8")
601601
602602 message = anthropic.Anthropic().messages.create(
603 model="claude-opus-5",
603 model="claude-opus-5-5",
604604 max_tokens=1024,
605605 messages=[
606606 {
from line 623
623623
624624 # Option 2: URL-referenced image
625625 message_from_url = anthropic.Anthropic().messages.create(
626 model="claude-opus-5",
626 model="claude-opus-5-5",
627627 max_tokens=1024,
628628 messages=[
629629 {
from line 654
654654 const imageData = Buffer.from(imageArrayBuffer).toString("base64");
655655
656656 const message = await anthropic.messages.create({
657 model: "claude-opus-5",
657 model: "claude-opus-5-5",
658658 max_tokens: 1024,
659659 messages: [
660660 {
from line 680
680680
681681 // Option 2: URL-referenced image
682682 const messageFromUrl = await anthropic.messages.create({
683 model: "claude-opus-5",
683 model: "claude-opus-5-5",
684684 max_tokens: 1024,
685685 messages: [
686686 {
from line 721
721721
722722 var parameters = new MessageCreateParams
723723 {
724 Model = Model.ClaudeOpus5,
724 Model = Model.ClaudeOpus5_5,
725725 MaxTokens = 1024,
726726 Messages =
727727 [
from line 749
749749 // Option 2: URL-referenced image
750750 var parametersFromUrl = new MessageCreateParams
751751 {
752 Model = Model.ClaudeOpus5,
752 Model = Model.ClaudeOpus5_5,
753753 MaxTokens = 1024,
754754 Messages =
755755 [
from line 799
799799 imageData := base64.StdEncoding.EncodeToString(imageBytes)
800800
801801 message, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{
802 Model: anthropic.ModelClaudeOpus5,
802 Model: anthropic.ModelClaudeOpus5_5,
803803 MaxTokens: 1024,
804804 Messages: []anthropic.MessageParam{
805805 anthropic.NewUserMessage(
from line 815
815815
816816 // Option 2: URL-referenced image
817817 messageFromURL, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{
818 Model: anthropic.ModelClaudeOpus5,
818 Model: anthropic.ModelClaudeOpus5_5,
819819 MaxTokens: 1024,
820820 Messages: []anthropic.MessageParam{
821821 anthropic.NewUserMessage(
from line 859
859859
860860 Message message = client.messages().create(
861861 MessageCreateParams.builder()
862 .model(Model.CLAUDE_OPUS_5)
862 .model(Model.CLAUDE_OPUS_5_5)
863863 .maxTokens(1024L)
864864 .addUserMessageOfBlockParams(base64Content)
865865 .build());
from line 881
881881
882882 Message messageFromUrl = client.messages().create(
883883 MessageCreateParams.builder()
884 .model(Model.CLAUDE_OPUS_5)
884 .model(Model.CLAUDE_OPUS_5_5)
885885 .maxTokens(1024L)
886886 .addUserMessageOfBlockParams(urlContent)
887887 .build());
from line 917
917917 ],
918918 ],
919919 ],
920 model: 'claude-opus-5',
920 model: 'claude-opus-5-5',
921921 );
922922 echo $message;
923923
from line 942
942942 ],
943943 ],
944944 ],
945 model: 'claude-opus-5',
945 model: 'claude-opus-5-5',
946946 );
947947 echo $message_from_url;
948948 ```
from line 959
959959 image_data = Base64.strict_encode64(Net::HTTP.get(URI(image_url)))
960960
961961 message = client.messages.create(
962 model: "claude-opus-5",
962 model: "claude-opus-5-5",
963963 max_tokens: 1024,
964964 messages: [
965965 {
from line 985
985985
986986 # Option 2: URL-referenced image
987987 message_from_url = client.messages.create(
988 model: "claude-opus-5",
988 model: "claude-opus-5-5",
989989 max_tokens: 1024,
990990 messages: [
991991 {
from line 1021
10211021 "text": "This image is a beautiful minimalist/flat-design illustration of a sunset landscape. Here's what it contains:\n\n**Sky & Sun:**\n- A warm gradient sky transitioning from golden-yellow at the top to deep orange toward the horizon\n- A large pale yellow sun positioned in the upper-right area\n\n**Birds:**\n- Three small silhouetted birds flying in the upper-left portion of the sky, depicted as simple \"M\" or \"v\" shapes\n\n**Mountains:**\n- Multiple layered mountain peaks in purple and maroon tones\n- The mountains overlap to create depth, with varying shades of dusty purple and deep burgundy\n\n**Water:**\n- A dark purple body of water at the bottom of the image\n- A reflection of the sun shown as horizontal cream/peach colored lines in the center-bottom area\n\nThe overall style is clean, geometric, and uses a warm sunset color palette (oranges, yellows, purples, and maroons), giving it a peaceful, serene aesthetic typical of modern vector/flat design artwork."
10221022 }
10231023 ],
1024 "model": "claude-opus-5",
1024 "model": "claude-opus-5-5",
10251025 "stop_reason": "end_turn",
10261026 "stop_sequence": null,
10271027 "usage": {