diff --git a/src/proxy/anthropic.ts b/src/proxy/anthropic.ts
index c1e037d..7f9228c 100644
--- a/src/proxy/anthropic.ts
+++ b/src/proxy/anthropic.ts
@@ -196,10 +196,11 @@ function setAnthropicBetaHeader(req: Request) {
     betaHeaders.push("extended-cache-ttl-2025-04-11");
   }
   
-  // Add 1M context beta header for Claude Sonnet 4/Opus 4 if context > 200k tokens
+  // Add 1M context beta header for Claude Sonnet 4/Opus 4/Haiku 4.5 if context > 200k tokens
   const supportsBigContext =
     model?.includes("claude-sonnet-4") ||
-    model?.includes("claude-opus-4");
+    model?.includes("claude-opus-4") ||
+    model?.includes("claude-haiku-4");
   if (supportsBigContext && req.promptTokens && req.outputTokens) {
     const contextTokens = req.promptTokens + req.outputTokens;
     if (contextTokens > 200000) {
@@ -226,7 +227,7 @@ function addWebSearchTool(req: Request) {
   // Check if this is a Claude model that supports web search and if web search is enabled
   const isClaude35 = req.body.model?.includes("claude-3-5") || req.body.model?.includes("claude-3.5");
   const isClaude37 = req.body.model?.includes("claude-3-7") || req.body.model?.includes("claude-3.7");
-  const isClaude4 = req.body.model?.includes("claude-sonnet-4") || req.body.model?.includes("claude-opus-4");
+  const isClaude4 = req.body.model?.includes("claude-sonnet-4") || req.body.model?.includes("claude-opus-4") || req.body.model?.includes("claude-haiku-4");
   const useWebSearch = (isClaude35 || isClaude37 || isClaude4) && Boolean(req.body.enable_web_search);
   
   if (useWebSearch) {
@@ -328,7 +329,8 @@ const preprocessAnthropicTextRequest: RequestHandler = (req, res, next) => {
   const model = req.body.model;
   const isClaude4Model =
     model?.includes("claude-sonnet-4") ||
-    model?.includes("claude-opus-4");
+    model?.includes("claude-opus-4") ||
+    model?.includes("claude-haiku-4");
   if (model?.startsWith("claude-3") || isClaude4Model) {
     textToChatPreprocessor(req, res, next);
   } else {
@@ -363,7 +365,8 @@ const preprocessOpenAICompatRequest: RequestHandler = (req, res, next) => {
   const model = req.body.model;
   const isClaude4 =
     model?.includes("claude-sonnet-4") ||
-    model?.includes("claude-opus-4");
+    model?.includes("claude-opus-4") ||
+    model?.includes("claude-haiku-4");
   if (model?.includes("claude-3") || isClaude4) {
     oaiToChatPreprocessor(req, res, next);
   } else {
diff --git a/src/proxy/aws-claude.ts b/src/proxy/aws-claude.ts
index f2e5c12..91a434f 100644
--- a/src/proxy/aws-claude.ts
+++ b/src/proxy/aws-claude.ts
@@ -104,7 +104,8 @@ const preprocessAwsTextRequest: RequestHandler = (req, res, next) => {
   const model = req.body.model;
   const isClaude4Model =
     model?.includes("claude-sonnet-4") ||
-    model?.includes("claude-opus-4");
+    model?.includes("claude-opus-4") ||
+    model?.includes("claude-haiku-4");
   if (model?.includes("claude-3") || isClaude4Model) {
     textToChatPreprocessor(req, res, next);
   } else {
@@ -130,7 +131,8 @@ const preprocessOpenAICompatRequest: RequestHandler = (req, res, next) => {
   const model = req.body.model;
   const isClaude4Model =
     model?.includes("claude-sonnet-4") ||
-    model?.includes("claude-opus-4");
+    model?.includes("claude-opus-4") ||
+    model?.includes("claude-haiku-4");
   if (model?.includes("claude-3") || isClaude4Model) {
     oaiToAwsChatPreprocessor(req, res, next);
   } else {
@@ -345,10 +347,13 @@ function maybeReassignModel(req: Request) {
       // Mapping "claude-4.5-..." variants to their actual AWS Bedrock IDs
       // as defined in src/shared/claude-models.ts.
       switch (name) {
+        case "haiku":
+          req.body.model = "anthropic.claude-haiku-4-5-20251001-v1:0";
+          return;
         case "sonnet":
           req.body.model = "anthropic.claude-sonnet-4-5-20250929-v1:0";
           return;
-        // No opus or haiku variants for 4.5 yet
+        // No opus variant for 4.5 yet
       }
       break;
   }
diff --git a/src/proxy/gcp.ts b/src/proxy/gcp.ts
index 1366dd2..f392e85 100644
--- a/src/proxy/gcp.ts
+++ b/src/proxy/gcp.ts
@@ -34,6 +34,7 @@ const getModelsResponse = () => {
     "claude-opus-4@20250514",
     "claude-opus-4-1@20250805",
     "claude-sonnet-4-5@20250929",
+    "claude-haiku-4-5@20251001",
   ];
 
   const models = variants.map((id) => ({
@@ -252,6 +253,9 @@ function maybeReassignModel(req: Request) {
 
     case "4.5":
       switch (flavor) {
+        case "haiku":
+          req.body.model = "claude-haiku-4-5@20251001";
+          return;
         case "sonnet":
           req.body.model = "claude-sonnet-4-5@20250929";
           return;
diff --git a/src/proxy/middleware/request/preprocessors/validate-context-size.ts b/src/proxy/middleware/request/preprocessors/validate-context-size.ts
index 5f3fece..e1f83ce 100644
--- a/src/proxy/middleware/request/preprocessors/validate-context-size.ts
+++ b/src/proxy/middleware/request/preprocessors/validate-context-size.ts
@@ -123,13 +123,13 @@ export const validateContextSize: RequestPreprocessor = async (req) => {
     modelMax = 200000;
   } else if (model.match(/^claude-3/)) {
     modelMax = 200000;
-  } else if (model.match(/^claude-(?:sonnet|opus)-4(?:-5)?/)) {
+  } else if (model.match(/^claude-(?:sonnet|opus|haiku)-4(?:-5)?/)) {
     modelMax = 1000000;
   } else if (model.match(/^gemini-/)) {
     modelMax = 1024000;
   } else if (model.match(/^anthropic\.claude-3/)) {
     modelMax = 200000;
-  } else if (model.match(/^anthropic\.claude-(?:sonnet|opus)-4(?:-5)?/)) {
+  } else if (model.match(/^anthropic\.claude-(?:sonnet|opus|haiku)-4(?:-5)?/)) {
     modelMax = 1000000;
   } else if (model.match(/^anthropic\.claude-v2:\d/)) {
     modelMax = 200000;
diff --git a/src/service-info.ts b/src/service-info.ts
index 5b63dc9..91d0caf 100644
--- a/src/service-info.ts
+++ b/src/service-info.ts
@@ -534,7 +534,9 @@ function addKeyToAggregates(k: KeyPoolKey) {
             addToFamily(`aws-claude__awsSonnet3_5`, 1);
           } else if (id.includes("claude-3-7-sonnet")) {
             addToFamily(`aws-claude__awsSonnet3_7`, 1);
-          } else if (id.includes("claude-3-haiku")) {
+          } else if (id.includes("claude-3-haiku") || id.includes("claude-3-5-haiku")) {
+            addToFamily(`aws-claude__awsHaiku`, 1);
+          } else if (id.includes("haiku-4-5")) {
             addToFamily(`aws-claude__awsHaiku`, 1);
           } else if (id.includes("sonnet-4-5")) {
             addToFamily(`aws-claude__awsSonnet4_5`, 1);
diff --git a/src/shared/claude-4-1-validation.ts b/src/shared/claude-4-1-validation.ts
index 7616f66..0746bb7 100644
--- a/src/shared/claude-4-1-validation.ts
+++ b/src/shared/claude-4-1-validation.ts
@@ -73,7 +73,10 @@ function isClaude41OpusModel(model: string): boolean {
   if (model.includes("claude-opus-4-1")) return true;
   
   // sonnet45
-  if (model.includes("claude-sonnet-4-5")) return true
+  if (model.includes("claude-sonnet-4-5")) return true;
+  
+  // haiku45
+  if (model.includes("claude-haiku-4-5")) return true;
   
   return false;
 }
diff --git a/src/shared/claude-models.ts b/src/shared/claude-models.ts
index e482769..6c98b2f 100644
--- a/src/shared/claude-models.ts
+++ b/src/shared/claude-models.ts
@@ -28,6 +28,9 @@ export const claudeModels: ClaudeModelMapping[] = [
   { awsId: "anthropic.claude-sonnet-4-5-20250929-v1:0", anthropicId: "claude-sonnet-4-5-20250929", displayName: "Claude 4.5 Sonnet" },
   { awsId: "anthropic.claude-sonnet-4-5-20250929-v1:0", anthropicId: "claude-sonnet-4-5", displayName: "Claude 4.5 Sonnet" },
   { awsId: "anthropic.claude-sonnet-4-5-20250929-v1:0", anthropicId: "claude-sonnet-4-5-latest", displayName: "Claude 4.5 Sonnet (Latest)" },
+  { awsId: "anthropic.claude-haiku-4-5-20251001-v1:0", anthropicId: "claude-haiku-4-5-20251001", displayName: "Claude 4.5 Haiku" },
+  { awsId: "anthropic.claude-haiku-4-5-20251001-v1:0", anthropicId: "claude-haiku-4-5", displayName: "Claude 4.5 Haiku" },
+  { awsId: "anthropic.claude-haiku-4-5-20251001-v1:0", anthropicId: "claude-haiku-4-5-latest", displayName: "Claude 4.5 Haiku (Latest)" },
 ];
 
 export function findByAwsId(awsId: string): ClaudeModelMapping | undefined {
diff --git a/src/shared/key-management/aws/checker.ts b/src/shared/key-management/aws/checker.ts
index d29685e..e76e69b 100644
--- a/src/shared/key-management/aws/checker.ts
+++ b/src/shared/key-management/aws/checker.ts
@@ -29,6 +29,7 @@ const KNOWN_MODEL_IDS: ModuleAliasTuple[] = [
   ["anthropic.claude-opus-4-20250514-v1:0"],
   ["anthropic.claude-opus-4-1-20250805-v1:0"],
   ["anthropic.claude-sonnet-4-5-20250929-v1:0"],
+  ["anthropic.claude-haiku-4-5-20251001-v1:0"],
   ["mistral.mistral-7b-instruct-v0:2"],
   ["mistral.mixtral-8x7b-instruct-v0:1"],
   ["mistral.mistral-large-2402-v1:0"],
diff --git a/src/shared/key-management/gcp/checker.ts b/src/shared/key-management/gcp/checker.ts
index adeb105..50716e0 100644
--- a/src/shared/key-management/gcp/checker.ts
+++ b/src/shared/key-management/gcp/checker.ts
@@ -45,17 +45,18 @@ export class GcpKeyChecker extends KeyCheckerBase<GcpKey> {
         this.invokeModel("claude-opus-4-1@20250805", key, true),
         this.invokeModel("claude-3-5-sonnet-v2@20241022", key, true),
         this.invokeModel("claude-sonnet-4-5@20250929", key, true),
+        this.invokeModel("claude-haiku-4-5@20251001", key, true),
       ];
 
-      const [sonnet, haiku, opus3, opus41, sonnet35, sonnet45] = await Promise.all(checks);
+      const [sonnet, haiku, opus3, opus41, sonnet35, sonnet45, haiku45] = await Promise.all(checks);
 
       this.log.debug(
-        { key: key.hash, sonnet, haiku, opus3, opus41, sonnet35, sonnet45 },
+        { key: key.hash, sonnet, haiku, opus3, opus41, sonnet35, sonnet45, haiku45 },
         "GCP model initial tests complete."
       );
 
       const families: GcpModelFamily[] = [];
-      if (sonnet || sonnet35 || sonnet45 || haiku) families.push("gcp-claude");
+      if (sonnet || sonnet35 || sonnet45 || haiku || haiku45) families.push("gcp-claude");
       if (opus3 || opus41) families.push("gcp-claude-opus");
 
       if (families.length === 0) {