Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
One change · api

go changed

cli-sdks-libraries/sdks/go

Nearest release: v2.1.280, published under an hour before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Recorded here
Lines+10added
Lines−10removed
From line 50 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits4to this page, all time

The whole hunk

from line 50, old and new numbered
/
lines
from line 50
5050 Messages: []anthropic.MessageParam{
5151 anthropic.NewUserMessage(anthropic.NewTextBlock("What is a quaternion?")),
5252 },
53 Model: anthropic.ModelClaudeOpus5,
53 Model: anthropic.ModelClaudeOpus5_5,
5454 })
5555 if err != nil {
5656 panic(err.Error())
from line 73
7373 }
7474 
7575 message, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{
76 Model: anthropic.ModelClaudeOpus5,
76 Model: anthropic.ModelClaudeOpus5_5,
7777 Messages: messages,
7878 MaxTokens: 1024,
7979 })
from line 89
8989 ))
9090 
9191 message, err = client.Messages.New(context.TODO(), anthropic.MessageNewParams{
92 Model: anthropic.ModelClaudeOpus5,
92 Model: anthropic.ModelClaudeOpus5_5,
9393 Messages: messages,
9494 MaxTokens: 1024,
9595 })
from line 104
104104 <Accordion title="System prompts">
105105 ```go
106106 message, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{
107 Model: anthropic.ModelClaudeOpus5,
107 Model: anthropic.ModelClaudeOpus5_5,
108108 MaxTokens: 1024,
109109 System: []anthropic.TextBlockParam{
110110 {Text: "Be very serious at all times."},
from line 123
123123 content := "What is a quaternion?"
124124 
125125 stream := client.Messages.NewStreaming(context.TODO(), anthropic.MessageNewParams{
126 Model: anthropic.ModelClaudeOpus5,
126 Model: anthropic.ModelClaudeOpus5_5,
127127 MaxTokens: 1024,
128128 Messages: []anthropic.MessageParam{
129129 anthropic.NewUserMessage(anthropic.NewTextBlock(content)),
from line 174
174174 
175175 for {
176176 message, err := client.Messages.New(context.TODO(), anthropic.MessageNewParams{
177 Model: anthropic.ModelClaudeOpus5,
177 Model: anthropic.ModelClaudeOpus5_5,
178178 MaxTokens: 1024,
179179 Messages: messages,
180180 Tools: tools,
from line 466
466466 }},
467467 Role: anthropic.MessageParamRoleUser,
468468 }},
469 Model: anthropic.ModelClaudeOpus5,
469 Model: anthropic.ModelClaudeOpus5_5,
470470})
471471if err != nil {
472472 var apierr *anthropic.Error
from line 507
507507 }},
508508 Role: anthropic.MessageParamRoleUser,
509509 }},
510 Model: anthropic.ModelClaudeOpus5,
510 Model: anthropic.ModelClaudeOpus5_5,
511511 },
512512 option.WithMaxRetries(5),
513513 )
from line 536
536536 }},
537537 Role: anthropic.MessageParamRoleUser,
538538 }},
539 Model: anthropic.ModelClaudeOpus5,
539 Model: anthropic.ModelClaudeOpus5_5,
540540 },
541541 // This sets the per-retry timeout
542542 option.WithRequestTimeout(20*time.Second),
from line 676
676676 }},
677677 Role: anthropic.MessageParamRoleUser,
678678 }},
679 Model: anthropic.ModelClaudeOpus5,
679 Model: anthropic.ModelClaudeOpus5_5,
680680 },
681681 option.WithResponseInto(&response),
682682)