Add Anthropic Claude Sonnet 4.6 support across providers

packages/types/src/providers/anthropic.ts

@@ -7,6 +7,27 @@ export type AnthropicModelId = keyof typeof anthropicModels
 export const anthropicDefaultModelId: AnthropicModelId = "claude-sonnet-4-5"
 
 export const anthropicModels = {
+	"claude-sonnet-4-6": {
+		maxTokens: 64_000, // Overridden to 8k if `enableReasoningEffort` is false.
+		contextWindow: 200_000, // Default 200K, extendable to 1M with beta flag 'context-1m-2025-08-07'
+		supportsImages: true,
+		supportsPromptCache: true,
+		inputPrice: 3.0, // $3 per million input tokens (≤200K context)
+		outputPrice: 15.0, // $15 per million output tokens (≤200K context)
+		cacheWritesPrice: 3.75, // $3.75 per million tokens
+		cacheReadsPrice: 0.3, // $0.30 per million tokens
+		supportsReasoningBudget: true,
+		// Tiered pricing for extended context (requires beta flag 'context-1m-2025-08-07')
+		tiers: [
+			{
+				contextWindow: 1_000_000, // 1M tokens with beta flag
+				inputPrice: 6.0, // $6 per million input tokens (>200K context)
+				outputPrice: 22.5, // $22.50 per million output tokens (>200K context)
+				cacheWritesPrice: 7.5, // $7.50 per million tokens (>200K context)
+				cacheReadsPrice: 0.6, // $0.60 per million tokens (>200K context)
+			},
+		],
+	},
 	"claude-sonnet-4-5": {
 		maxTokens: 64_000, // Overridden to 8k if `enableReasoningEffort` is false.
 		contextWindow: 200_000, // Default 200K, extendable to 1M with beta flag 'context-1m-2025-08-07'

packages/types/src/providers/bedrock.ts

@@ -27,6 +27,30 @@ export const bedrockModels = {
 		maxCachePoints: 4,
 		cachableFields: ["system", "messages", "tools"],
 	},
+	"anthropic.claude-sonnet-4-6-20260114-v1:0": {
+		maxTokens: 8192,
+		contextWindow: 200_000, // Default 200K, extendable to 1M with beta flag 'context-1m-2025-08-07'
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningBudget: true,
+		inputPrice: 3.0, // $3 per million input tokens (≤200K context)
+		outputPrice: 15.0, // $15 per million output tokens (≤200K context)
+		cacheWritesPrice: 3.75, // $3.75 per million tokens
+		cacheReadsPrice: 0.3, // $0.30 per million tokens
+		minTokensPerCachePoint: 1024,
+		maxCachePoints: 4,
+		cachableFields: ["system", "messages", "tools"],
+		// Tiered pricing for extended context (requires beta flag 'context-1m-2025-08-07')
+		tiers: [
+			{
+				contextWindow: 1_000_000, // 1M tokens with beta flag
+				inputPrice: 6.0, // $6 per million input tokens (>200K context)
+				outputPrice: 22.5, // $22.50 per million output tokens (>200K context)
+				cacheWritesPrice: 7.5, // $7.50 per million tokens (>200K context)
+				cacheReadsPrice: 0.6, // $0.60 per million tokens (>200K context)
+			},
+		],
+	},
 	"amazon.nova-pro-v1:0": {
 		maxTokens: 5000,
 		contextWindow: 300_000,
@@ -499,19 +523,22 @@ export const BEDROCK_REGIONS = [
 export const BEDROCK_1M_CONTEXT_MODEL_IDS = [
 	"anthropic.claude-sonnet-4-20250514-v1:0",
 	"anthropic.claude-sonnet-4-5-20250929-v1:0",
+	"anthropic.claude-sonnet-4-6-20260114-v1:0",
 	"anthropic.claude-opus-4-6-v1",
 ] as const
 
 // Amazon Bedrock models that support Global Inference profiles
 // As of Nov 2025, AWS supports Global Inference for:
 // - Claude Sonnet 4
 // - Claude Sonnet 4.5
+// - Claude Sonnet 4.6
 // - Claude Haiku 4.5
 // - Claude Opus 4.5
 // - Claude Opus 4.6
 export const BEDROCK_GLOBAL_INFERENCE_MODEL_IDS = [
 	"anthropic.claude-sonnet-4-20250514-v1:0",
 	"anthropic.claude-sonnet-4-5-20250929-v1:0",
+	"anthropic.claude-sonnet-4-6-20260114-v1:0",
 	"anthropic.claude-haiku-4-5-20251001-v1:0",
 	"anthropic.claude-opus-4-5-20251101-v1:0",
 	"anthropic.claude-opus-4-6-v1",

packages/types/src/providers/openrouter.ts

@@ -38,6 +38,7 @@ export const OPEN_ROUTER_PROMPT_CACHING_MODELS = new Set([
 	"anthropic/claude-3.7-sonnet:thinking",
 	"anthropic/claude-sonnet-4",
 	"anthropic/claude-sonnet-4.5",
+	"anthropic/claude-sonnet-4.6",
 	"anthropic/claude-opus-4",
 	"anthropic/claude-opus-4.1",
 	"anthropic/claude-opus-4.5",
@@ -75,6 +76,7 @@ export const OPEN_ROUTER_REASONING_BUDGET_MODELS = new Set([
 	"anthropic/claude-opus-4.6",
 	"anthropic/claude-sonnet-4",
 	"anthropic/claude-sonnet-4.5",
+	"anthropic/claude-sonnet-4.6",
 	"anthropic/claude-haiku-4.5",
 	"google/gemini-2.5-pro-preview",
 	"google/gemini-2.5-pro",

packages/types/src/providers/vercel-ai-gateway.ts

@@ -14,6 +14,7 @@ export const VERCEL_AI_GATEWAY_PROMPT_CACHING_MODELS = new Set([
 	"anthropic/claude-opus-4.5",
 	"anthropic/claude-opus-4.6",
 	"anthropic/claude-sonnet-4",
+	"anthropic/claude-sonnet-4.6",
 	"openai/gpt-4.1",
 	"openai/gpt-4.1-mini",
 	"openai/gpt-4.1-nano",
@@ -55,6 +56,7 @@ export const VERCEL_AI_GATEWAY_VISION_AND_TOOLS_MODELS = new Set([
 	"anthropic/claude-opus-4.5",
 	"anthropic/claude-opus-4.6",
 	"anthropic/claude-sonnet-4",
+	"anthropic/claude-sonnet-4.6",
 	"google/gemini-1.5-flash",
 	"google/gemini-1.5-pro",
 	"google/gemini-2.0-flash",

packages/types/src/providers/vertex.ts

@@ -263,6 +263,27 @@ export const vertexModels = {
 			},
 		],
 	},
+	"claude-sonnet-4-6@20260114": {
+		maxTokens: 8192,
+		contextWindow: 200_000, // Default 200K, extendable to 1M with beta flag 'context-1m-2025-08-07'
+		supportsImages: true,
+		supportsPromptCache: true,
+		inputPrice: 3.0, // $3 per million input tokens (≤200K context)
+		outputPrice: 15.0, // $15 per million output tokens (≤200K context)
+		cacheWritesPrice: 3.75, // $3.75 per million tokens
+		cacheReadsPrice: 0.3, // $0.30 per million tokens
+		supportsReasoningBudget: true,
+		// Tiered pricing for extended context (requires beta flag 'context-1m-2025-08-07')
+		tiers: [
+			{
+				contextWindow: 1_000_000, // 1M tokens with beta flag
+				inputPrice: 6.0, // $6 per million input tokens (>200K context)
+				outputPrice: 22.5, // $22.50 per million output tokens (>200K context)
+				cacheWritesPrice: 7.5, // $7.50 per million tokens (>200K context)
+				cacheReadsPrice: 0.6, // $0.60 per million tokens (>200K context)
+			},
+		],
+	},
 	"claude-haiku-4-5@20251001": {
 		maxTokens: 8192,
 		contextWindow: 200_000,
@@ -491,6 +512,7 @@ export const vertexModels = {
 export const VERTEX_1M_CONTEXT_MODEL_IDS = [
 	"claude-sonnet-4@20250514",
 	"claude-sonnet-4-5@20250929",
+	"claude-sonnet-4-6@20260114",
 	"claude-opus-4-6",
 ] as const
 

src/api/providers/__tests__/anthropic-vertex.spec.ts

@@ -899,6 +899,21 @@ describe("VertexHandler", () => {
 			expect(model.betas).toContain("context-1m-2025-08-07")
 		})
 
+		it("should enable 1M context for Claude Sonnet 4.6 when beta flag is set", () => {
+			const handler = new AnthropicVertexHandler({
+				apiModelId: "claude-sonnet-4-6@20260114",
+				vertexProjectId: "test-project",
+				vertexRegion: "us-central1",
+				vertex1MContext: true,
+			})
+
+			const model = handler.getModel()
+			expect(model.info.contextWindow).toBe(1_000_000)
+			expect(model.info.inputPrice).toBe(6.0)
+			expect(model.info.outputPrice).toBe(22.5)
+			expect(model.betas).toContain("context-1m-2025-08-07")
+		})
+
 		it("should not enable 1M context when flag is disabled", () => {
 			const handler = new AnthropicVertexHandler({
 				apiModelId: VERTEX_1M_CONTEXT_MODEL_IDS[0],

src/api/providers/__tests__/anthropic.spec.ts

@@ -187,6 +187,28 @@ describe("AnthropicHandler", () => {
 			// Verify API
 			expect(mockCreate).toHaveBeenCalled()
 		})
+
+		it("should include 1M context beta header for Claude Sonnet 4.6 when enabled", async () => {
+			const sonnet46Handler = new AnthropicHandler({
+				apiKey: "test-api-key",
+				apiModelId: "claude-sonnet-4-6",
+				anthropicBeta1MContext: true,
+			})
+
+			const stream = sonnet46Handler.createMessage(systemPrompt, [
+				{
+					role: "user",
+					content: [{ type: "text" as const, text: "Hello" }],
+				},
+			])
+
+			for await (const _chunk of stream) {
+				// Consume stream
+			}
+
+			const requestOptions = mockCreate.mock.calls[mockCreate.mock.calls.length - 1]?.[1]
+			expect(requestOptions?.headers?.["anthropic-beta"]).toContain("context-1m-2025-08-07")
+		})
 	})
 
 	describe("completePrompt", () => {
@@ -286,6 +308,18 @@ describe("AnthropicHandler", () => {
 			expect(model.info.supportsReasoningBudget).toBe(true)
 		})
 
+		it("should handle Claude 4.6 Sonnet model correctly", () => {
+			const handler = new AnthropicHandler({
+				apiKey: "test-api-key",
+				apiModelId: "claude-sonnet-4-6",
+			})
+			const model = handler.getModel()
+			expect(model.id).toBe("claude-sonnet-4-6")
+			expect(model.info.maxTokens).toBe(64000)
+			expect(model.info.contextWindow).toBe(200000)
+			expect(model.info.supportsReasoningBudget).toBe(true)
+		})
+
 		it("should enable 1M context for Claude 4.5 Sonnet when beta flag is set", () => {
 			const handler = new AnthropicHandler({
 				apiKey: "test-api-key",
@@ -297,6 +331,18 @@ describe("AnthropicHandler", () => {
 			expect(model.info.inputPrice).toBe(6.0)
 			expect(model.info.outputPrice).toBe(22.5)
 		})
+
+		it("should enable 1M context for Claude 4.6 Sonnet when beta flag is set", () => {
+			const handler = new AnthropicHandler({
+				apiKey: "test-api-key",
+				apiModelId: "claude-sonnet-4-6",
+				anthropicBeta1MContext: true,
+			})
+			const model = handler.getModel()
+			expect(model.info.contextWindow).toBe(1000000)
+			expect(model.info.inputPrice).toBe(6.0)
+			expect(model.info.outputPrice).toBe(22.5)
+		})
 	})
 
 	describe("reasoning block filtering", () => {

src/api/providers/__tests__/bedrock.spec.ts

@@ -701,6 +701,21 @@ describe("AwsBedrockHandler", () => {
 			expect(model.info.contextWindow).toBe(1_000_000)
 		})
 
+		it("should apply 1M tier pricing when awsBedrock1MContext is true for Claude Sonnet 4.6", () => {
+			const handler = new AwsBedrockHandler({
+				apiModelId: "anthropic.claude-sonnet-4-6-20260114-v1:0",
+				awsAccessKey: "test",
+				awsSecretKey: "test",
+				awsRegion: "us-east-1",
+				awsBedrock1MContext: true,
+			})
+
+			const model = handler.getModel()
+			expect(model.info.contextWindow).toBe(1_000_000)
+			expect(model.info.inputPrice).toBe(6.0)
+			expect(model.info.outputPrice).toBe(22.5)
+		})
+
 		it("should use default context window when awsBedrock1MContext is false for Claude Sonnet 4", () => {
 			const handler = new AwsBedrockHandler({
 				apiModelId: BEDROCK_1M_CONTEXT_MODEL_IDS[0],

src/api/providers/anthropic.ts

@@ -64,10 +64,11 @@ export class AnthropicHandler extends BaseProvider implements SingleCompletionHa
 		// Filter out non-Anthropic blocks (reasoning, thoughtSignature, etc.) before sending to the API
 		const sanitizedMessages = filterNonAnthropicBlocks(messages)
 
-		// Add 1M context beta flag if enabled for supported models (Claude Sonnet 4/4.5, Opus 4.6)
+		// Add 1M context beta flag if enabled for supported models (Claude Sonnet 4/4.5/4.6, Opus 4.6)
 		if (
 			(modelId === "claude-sonnet-4-20250514" ||
 				modelId === "claude-sonnet-4-5" ||
+				modelId === "claude-sonnet-4-6" ||
 				modelId === "claude-opus-4-6") &&
 			this.options.anthropicBeta1MContext
 		) {
@@ -80,6 +81,7 @@ export class AnthropicHandler extends BaseProvider implements SingleCompletionHa
 		}
 
 		switch (modelId) {
+			case "claude-sonnet-4-6":
 			case "claude-sonnet-4-5":
 			case "claude-sonnet-4-20250514":
 			case "claude-opus-4-6":
@@ -145,6 +147,7 @@ export class AnthropicHandler extends BaseProvider implements SingleCompletionHa
 
 							// Then check for models that support prompt caching
 							switch (modelId) {
+								case "claude-sonnet-4-6":
 								case "claude-sonnet-4-5":
 								case "claude-sonnet-4-20250514":
 								case "claude-opus-4-6":
@@ -336,7 +339,10 @@ export class AnthropicHandler extends BaseProvider implements SingleCompletionHa
 
 		// If 1M context beta is enabled for supported models, update the model info
 		if (
-			(id === "claude-sonnet-4-20250514" || id === "claude-sonnet-4-5" || id === "claude-opus-4-6") &&
+			(id === "claude-sonnet-4-20250514" ||
+				id === "claude-sonnet-4-5" ||
+				id === "claude-sonnet-4-6" ||
+				id === "claude-opus-4-6") &&
 			this.options.anthropicBeta1MContext
 		) {
 			// Use the tier pricing for 1M context

src/api/providers/fetchers/__tests__/openrouter.spec.ts

@@ -266,6 +266,30 @@ describe("OpenRouter API", () => {
 	})
 
 	describe("parseOpenRouterModel", () => {
+		it("sets claude-sonnet-4.6 model to Anthropic max tokens", () => {
+			const mockModel = {
+				name: "Claude Sonnet 4.6",
+				description: "Test model",
+				context_length: 200000,
+				max_completion_tokens: 8192,
+				pricing: {
+					prompt: "0.000003",
+					completion: "0.000015",
+				},
+			}
+
+			const result = parseOpenRouterModel({
+				id: "anthropic/claude-sonnet-4.6",
+				model: mockModel,
+				inputModality: ["text"],
+				outputModality: ["text"],
+				maxTokens: 8192,
+			})
+
+			expect(result.maxTokens).toBe(64000)
+			expect(result.contextWindow).toBe(200000)
+		})
+
 		it("sets horizon-alpha model to 32k max tokens", () => {
 			const mockModel = {
 				name: "Horizon Alpha",

src/api/providers/fetchers/openrouter.ts

@@ -243,6 +243,11 @@ export const parseOpenRouterModel = ({
 		modelInfo.maxTokens = anthropicModels["claude-3-7-sonnet-20250219:thinking"].maxTokens
 	}
 
+	// Set claude-sonnet-4.6 model to use the correct configuration
+	if (id === "anthropic/claude-sonnet-4.6") {
+		modelInfo.maxTokens = anthropicModels["claude-sonnet-4-6"].maxTokens
+	}
+
 	// Set claude-opus-4.1 model to use the correct configuration
 	if (id === "anthropic/claude-opus-4.1") {
 		modelInfo.maxTokens = anthropicModels["claude-opus-4-1-20250805"].maxTokens

webview-ui/src/components/settings/providers/Anthropic.tsx

@@ -26,6 +26,7 @@ export const Anthropic = ({ apiConfiguration, setApiConfigurationField }: Anthro
 	const supports1MContextBeta =
 		selectedModel?.id === "claude-sonnet-4-20250514" ||
 		selectedModel?.id === "claude-sonnet-4-5" ||
+		selectedModel?.id === "claude-sonnet-4-6" ||
 		selectedModel?.id === "claude-opus-4-6"
 
 	const handleInputChange = useCallback(

webview-ui/src/components/ui/hooks/__tests__/useSelectedModel.spec.ts

@@ -402,6 +402,38 @@ describe("useSelectedModel", () => {
 		})
 	})
 
+	describe("anthropic provider with 1M context", () => {
+		beforeEach(() => {
+			mockUseRouterModels.mockReturnValue({
+				data: undefined,
+				isLoading: false,
+				isError: false,
+			} as any)
+
+			mockUseOpenRouterModelProviders.mockReturnValue({
+				data: undefined,
+				isLoading: false,
+				isError: false,
+			} as any)
+		})
+
+		it("should apply 1M pricing tier for Claude Sonnet 4.6 when enabled", () => {
+			const apiConfiguration: ProviderSettings = {
+				apiProvider: "anthropic",
+				apiModelId: "claude-sonnet-4-6",
+				anthropicBeta1MContext: true,
+			}
+
+			const wrapper = createWrapper()
+			const { result } = renderHook(() => useSelectedModel(apiConfiguration), { wrapper })
+
+			expect(result.current.id).toBe("claude-sonnet-4-6")
+			expect(result.current.info?.contextWindow).toBe(1_000_000)
+			expect(result.current.info?.inputPrice).toBe(6.0)
+			expect(result.current.info?.outputPrice).toBe(22.5)
+		})
+	})
+
 	describe("bedrock provider with 1M context", () => {
 		beforeEach(() => {
 			mockUseRouterModels.mockReturnValue({