diff --git a/core/llm/utils/calculateRequestCost.ts b/core/llm/utils/calculateRequestCost.ts
index 794524d448d..4a375c0f3f2 100644
--- a/core/llm/utils/calculateRequestCost.ts
+++ b/core/llm/utils/calculateRequestCost.ts
@@ -161,6 +161,11 @@ function calculateOpenAICost(
     "gpt-4o-mini": { input: 0.15, output: 0.6 },
     "gpt-4o": { input: 2.5, output: 10 },
 
+    // GPT-4.1 models
+    "gpt-4.1-mini": { input: 0.4, output: 1.6 },
+    "gpt-4.1-nano": { input: 0.1, output: 0.4 },
+    "gpt-4.1": { input: 2, output: 8 },
+
     // GPT-4 Turbo models
     "gpt-4-turbo": { input: 10, output: 30 },
 
diff --git a/core/llm/utils/calculateRequestCost.vitest.ts b/core/llm/utils/calculateRequestCost.vitest.ts
index 32183ca1b49..a3542eaa979 100644
--- a/core/llm/utils/calculateRequestCost.vitest.ts
+++ b/core/llm/utils/calculateRequestCost.vitest.ts
@@ -153,6 +153,40 @@ describe("calculateRequestCost", () => {
       description: "GPT-4o-mini",
     },
 
+    // OpenAI GPT-4.1 family
+    {
+      provider: "openai",
+      model: "gpt-4.1",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.006,
+      description: "GPT-4.1",
+    },
+    {
+      provider: "openai",
+      model: "gpt-4.1-mini",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.0012,
+      description: "GPT-4.1-mini",
+    },
+    {
+      provider: "openai",
+      model: "gpt-4.1-nano",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.0003,
+      description: "GPT-4.1-nano",
+    },
+    {
+      provider: "openai",
+      model: "gpt-4.1-2025-04-14",
+      promptTokens: 1000,
+      completionTokens: 500,
+      expectedCost: 0.006,
+      description: "GPT-4.1 date-stamped snapshot",
+    },
+
     // OpenAI GPT-3.5
     {
       provider: "openai",