diff --git a/core/llm/utils/calculateRequestCost.ts b/core/llm/utils/calculateRequestCost.ts
index 794524d448d..379cad6d3e9 100644
--- a/core/llm/utils/calculateRequestCost.ts
+++ b/core/llm/utils/calculateRequestCost.ts
@@ -17,6 +17,46 @@ function calculateAnthropicCost(
     string,
     { input: number; output: number; cacheWrite: number; cacheRead: number }
   > = {
+    // Claude Fable 5
+    "claude-fable-5": {
+      input: 10,
+      output: 50,
+      cacheWrite: 12.5,
+      cacheRead: 1,
+    },
+
+    // Claude Opus 5
+    "claude-opus-5": {
+      input: 5,
+      output: 25,
+      cacheWrite: 6.25,
+      cacheRead: 0.5,
+    },
+
+    // Claude Opus 4.8
+    "claude-opus-4-8": {
+      input: 5,
+      output: 25,
+      cacheWrite: 6.25,
+      cacheRead: 0.5,
+    },
+
+    // Claude Opus 4.7
+    "claude-opus-4-7": {
+      input: 5,
+      output: 25,
+      cacheWrite: 6.25,
+      cacheRead: 0.5,
+    },
+
+    // Claude Sonnet 5
+    "claude-sonnet-5": {
+      input: 3,
+      output: 15,
+      cacheWrite: 3.75,
+      cacheRead: 0.3,
+    },
+
     // Claude Sonnet 4.6
     "claude-sonnet-4-6": {
       input: 3,
@@ -25,6 +65,22 @@ function calculateAnthropicCost(
       cacheRead: 0.3,
     },
 
+    // Claude Sonnet 4.5
+    "claude-sonnet-4-5": {
+      input: 3,
+      output: 15,
+      cacheWrite: 3.75,
+      cacheRead: 0.3,
+    },
+
+    // Claude Haiku 4.5
+    "claude-haiku-4-5": {
+      input: 1,
+      output: 5,
+      cacheWrite: 1.25,
+      cacheRead: 0.1,
+    },
+
     // Claude Opus 4.6
     "claude-opus-4-6": {
       input: 5,
@@ -41,7 +97,7 @@ function calculateAnthropicCost(
       cacheRead: 0.5,
     },
 
-    // Claude Opus 4 (legacy)
+    // Claude 3 Opus (legacy)
     "claude-3-opus": {
       input: 15,
       output: 75,
@@ -49,7 +105,7 @@ function calculateAnthropicCost(
       cacheRead: 1.5,
     },
 
-    // Claude Sonnet 4 (optimal balance)
+    // Claude 3.5 Sonnet (legacy)
     "claude-3-5-sonnet": {
       input: 3,
       output: 15,
@@ -57,7 +113,7 @@ function calculateAnthropicCost(
       cacheRead: 0.3,
     },
 
-    // Claude Haiku 3.5 (fastest, most cost-effective)
+    // Claude 3.5 Haiku (legacy)
     "claude-3-5-haiku": {
       input: 0.8,
       output: 4,
diff --git a/core/llm/utils/calculateRequestCost.vitest.ts b/core/llm/utils/calculateRequestCost.vitest.ts
index 32183ca1b49..bdf2940412b 100644
--- a/core/llm/utils/calculateRequestCost.vitest.ts
+++ b/core/llm/utils/calculateRequestCost.vitest.ts
@@ -199,6 +199,86 @@ describe("calculateRequestCost", () => {
       description: "Provider name case insensitive",
     },
 
+    // Anthropic Claude Opus 5
+    {
+      provider: "anthropic",
+      model: "claude-opus-5",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.0175,
+      description: "Claude Opus 5 basic usage",
+    },
+    {
+      provider: "anthropic",
+      model: "claude-opus-5",
+      promptTokens: 1000,
+      completionTokens: 500,
+      cachedTokens: 2000,
+      cacheWriteTokens: 300,
+      expectedCost: 0.020375,
+      description: "Claude Opus 5 with cache reads and writes",
+    },
+
+    // Anthropic Claude Opus 4.8
+    {
+      provider: "anthropic",
+      model: "claude-opus-4-8",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.0175,
+      description: "Claude Opus 4.8",
+    },
+
+    // Anthropic Claude Opus 4.7
+    {
+      provider: "anthropic",
+      model: "claude-opus-4-7",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.0175,
+      description: "Claude Opus 4.7",
+    },
+
+    // Anthropic Claude Sonnet 5
+    {
+      provider: "anthropic",
+      model: "claude-sonnet-5",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.0105,
+      description: "Claude Sonnet 5",
+    },
+
+    // Anthropic Claude Sonnet 4.5
+    {
+      provider: "anthropic",
+      model: "claude-sonnet-4-5",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.0105,
+      description: "Claude Sonnet 4.5",
+    },
+
+    // Anthropic Claude Haiku 4.5
+    {
+      provider: "anthropic",
+      model: "claude-haiku-4-5",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.0035,
+      description: "Claude Haiku 4.5",
+    },
+
+    // Anthropic Claude Fable 5
+    {
+      provider: "anthropic",
+      model: "claude-fable-5",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.035,
+      description: "Claude Fable 5",
+    },
+
     // Unknown models/providers
     {
       provider: "anthropic",