feat(api): adds support for Claude Opus 4.5, Effort, Advance Tool Use Features, Autocompaction, and Computer Use v5

Author: stainless-app[bot]

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 34
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/anthropic%2Fanthropic-2f35b2ff9174d526a6d35796d2703490bfa5692312af67cbdfa4500283dabe31.yml
-openapi_spec_hash: dc52b25c487e97d355ef645644aa13e7
-config_hash: d23c4d678fcf7ff829a2891b3196edb6
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/anthropic%2Fanthropic-a49e89deec4e00d1da490808099d66e2001531b12d8666a7f5d0b496f760440d.yml
+openapi_spec_hash: c93ef3808c58e233b01966ff154f31ce
+config_hash: 7e9dfe17ab5c80abee5372ce746a926e

README.md

@@ -59,7 +59,7 @@ func main() {
 		Messages: []anthropic.MessageParam{
 			anthropic.NewUserMessage(anthropic.NewTextBlock("What is a quaternion?")),
 		},
-		Model: anthropic.ModelClaudeSonnet4_5_20250929,
+		Model: anthropic.ModelClaudeOpus4_5_20251101,
 	})
 	if err != nil {
 		panic(err.Error())
@@ -614,7 +614,7 @@ client.Messages.New(
 			}},
 			Role: anthropic.MessageParamRoleUser,
 		}},
-		Model: anthropic.ModelClaudeSonnet4_5_20250929,
+		Model: anthropic.ModelClaudeOpus4_5_20251101,
 	},
 	// This sets the per-retry timeout
 	option.WithRequestTimeout(20*time.Second),
@@ -684,7 +684,7 @@ client.Messages.New(
 			}},
 			Role: anthropic.MessageParamRoleUser,
 		}},
-		Model: anthropic.ModelClaudeSonnet4_5_20250929,
+		Model: anthropic.ModelClaudeOpus4_5_20251101,
 	},
 	option.WithMaxRetries(5),
 )
@@ -710,7 +710,7 @@ message, err := client.Messages.New(
 			}},
 			Role: anthropic.MessageParamRoleUser,
 		}},
-		Model: anthropic.ModelClaudeSonnet4_5_20250929,
+		Model: anthropic.ModelClaudeOpus4_5_20251101,
 	},
 	option.WithResponseInto(&response),
 )

api.md

@@ -209,23 +209,29 @@ Params Types:
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaContentBlockSourceParam">BetaContentBlockSourceParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaContentBlockSourceContentUnionParam">BetaContentBlockSourceContentUnionParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaContextManagementConfigParam">BetaContextManagementConfigParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaDirectCallerParam">BetaDirectCallerParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaFileDocumentSourceParam">BetaFileDocumentSourceParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaFileImageSourceParam">BetaFileImageSourceParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaImageBlockParam">BetaImageBlockParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaInputTokensClearAtLeastParam">BetaInputTokensClearAtLeastParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaInputTokensTriggerParam">BetaInputTokensTriggerParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaJSONOutputFormatParam">BetaJSONOutputFormatParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaMCPToolConfigParam">BetaMCPToolConfigParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaMCPToolDefaultConfigParam">BetaMCPToolDefaultConfigParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaMCPToolUseBlockParam">BetaMCPToolUseBlockParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaMCPToolsetParam">BetaMCPToolsetParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaMemoryTool20250818Param">BetaMemoryTool20250818Param</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaMessageParam">BetaMessageParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaMetadataParam">BetaMetadataParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaOutputConfigParam">BetaOutputConfigParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaPlainTextSourceParam">BetaPlainTextSourceParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaRedactedThinkingBlockParam">BetaRedactedThinkingBlockParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaRequestDocumentBlockParam">BetaRequestDocumentBlockParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaRequestMCPServerToolConfigurationParam">BetaRequestMCPServerToolConfigurationParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaRequestMCPServerURLDefinitionParam">BetaRequestMCPServerURLDefinitionParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaRequestMCPToolResultBlockParam">BetaRequestMCPToolResultBlockParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaSearchResultBlockParam">BetaSearchResultBlockParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaServerToolCallerParam">BetaServerToolCallerParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaServerToolUseBlockParam">BetaServerToolUseBlockParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaSkillParams">BetaSkillParams</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaTextBlockParam">BetaTextBlockParam</a>
@@ -250,7 +256,14 @@ Params Types:
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolChoiceToolParam">BetaToolChoiceToolParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolComputerUse20241022Param">BetaToolComputerUse20241022Param</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolComputerUse20250124Param">BetaToolComputerUse20250124Param</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolComputerUse20251124Param">BetaToolComputerUse20251124Param</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolReferenceBlockParam">BetaToolReferenceBlockParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolResultBlockParam">BetaToolResultBlockParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolSearchToolBm25_20251119Param">BetaToolSearchToolBm25_20251119Param</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolSearchToolRegex20251119Param">BetaToolSearchToolRegex20251119Param</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolSearchToolResultBlockParam">BetaToolSearchToolResultBlockParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolSearchToolResultErrorParam">BetaToolSearchToolResultErrorParam</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolSearchToolSearchResultBlockParam">BetaToolSearchToolSearchResultBlockParam</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolTextEditor20241022Param">BetaToolTextEditor20241022Param</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolTextEditor20250124Param">BetaToolTextEditor20250124Param</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolTextEditor20250429Param">BetaToolTextEditor20250429Param</a>
@@ -301,6 +314,7 @@ Response Types:
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaContentBlockUnion">BetaContentBlockUnion</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaContextManagementResponse">BetaContextManagementResponse</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaCountTokensContextManagementResponse">BetaCountTokensContextManagementResponse</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaDirectCaller">BetaDirectCaller</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaDocumentBlock">BetaDocumentBlock</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaInputJSONDelta">BetaInputJSONDelta</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaMCPToolResultBlock">BetaMCPToolResultBlock</a>
@@ -325,6 +339,7 @@ Response Types:
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaRawMessageStopEvent">BetaRawMessageStopEvent</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaRawMessageStreamEventUnion">BetaRawMessageStreamEventUnion</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaRedactedThinkingBlock">BetaRedactedThinkingBlock</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaServerToolCaller">BetaServerToolCaller</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaServerToolUsage">BetaServerToolUsage</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaServerToolUseBlock">BetaServerToolUseBlock</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaSignatureDelta">BetaSignatureDelta</a>
@@ -340,6 +355,10 @@ Response Types:
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaTextEditorCodeExecutionViewResultBlock">BetaTextEditorCodeExecutionViewResultBlock</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaThinkingBlock">BetaThinkingBlock</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaThinkingDelta">BetaThinkingDelta</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolReferenceBlock">BetaToolReferenceBlock</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolSearchToolResultBlock">BetaToolSearchToolResultBlock</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolSearchToolResultError">BetaToolSearchToolResultError</a>
+- <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolSearchToolSearchResultBlock">BetaToolSearchToolSearchResultBlock</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaToolUseBlock">BetaToolUseBlock</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaUsage">BetaUsage</a>
 - <a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go">anthropic</a>.<a href="https://pkg.go.dev/github.com/anthropics/anthropic-sdk-go#BetaWebFetchBlock">BetaWebFetchBlock</a>

beta.go

@@ -51,6 +51,7 @@ const (
 	AnthropicBetaOutput128k2025_02_19                 AnthropicBeta = "output-128k-2025-02-19"
 	AnthropicBetaFilesAPI2025_04_14                   AnthropicBeta = "files-api-2025-04-14"
 	AnthropicBetaMCPClient2025_04_04                  AnthropicBeta = "mcp-client-2025-04-04"
+	AnthropicBetaMCPClient2025_11_20                  AnthropicBeta = "mcp-client-2025-11-20"
 	AnthropicBetaDevFullThinking2025_05_14            AnthropicBeta = "dev-full-thinking-2025-05-14"
 	AnthropicBetaInterleavedThinking2025_05_14        AnthropicBeta = "interleaved-thinking-2025-05-14"
 	AnthropicBetaCodeExecution2025_05_22              AnthropicBeta = "code-execution-2025-05-22"