diff --git a/.changeset/angry-cooks-wait.md b/.changeset/angry-cooks-wait.md
new file mode 100644
index 00000000..9cdc9733
--- /dev/null
+++ b/.changeset/angry-cooks-wait.md
@@ -0,0 +1,7 @@
+---
+"@openai/agents-core": patch
+"@openai/agents-extensions": patch
+"@openai/agents-openai": patch
+---
+
+Fix #233 - eliminate confusion with "input_text" type items with role: "assistant"
diff --git a/packages/agents-core/src/types/protocol.ts b/packages/agents-core/src/types/protocol.ts
index 365e7f68..2a92abb0 100644
--- a/packages/agents-core/src/types/protocol.ts
+++ b/packages/agents-core/src/types/protocol.ts
@@ -241,7 +241,6 @@ export type ComputerAction = z.infer<typeof computerActions>;
 export const AssistantContent = z.discriminatedUnion('type', [
   OutputText,
   Refusal,
-  InputText,
   AudioContent,
   ImageContent,
 ]);
diff --git a/packages/agents-extensions/src/aiSdk.ts b/packages/agents-extensions/src/aiSdk.ts
index 369b5e56..be00766e 100644
--- a/packages/agents-extensions/src/aiSdk.ts
+++ b/packages/agents-extensions/src/aiSdk.ts
@@ -116,29 +116,16 @@ export function itemsToLanguageV1Messages(
         messages.push({
           role,
           content: content
-            .filter((c) => c.type === 'input_text' || c.type === 'output_text')
+            .filter((c) => c.type === 'output_text')
             .map((c) => {
               const { providerData: contentProviderData } = c;
-              if (c.type === 'output_text') {
-                return {
-                  type: 'text',
-                  text: c.text,
-                  providerMetadata: {
-                    ...(contentProviderData ?? {}),
-                  },
-                };
-              }
-              if (c.type === 'input_text') {
-                return {
-                  type: 'text',
-                  text: c.text,
-                  providerMetadata: {
-                    ...(contentProviderData ?? {}),
-                  },
-                };
-              }
-              const exhaustiveCheck = c satisfies never;
-              throw new UserError(`Unknown content type: ${exhaustiveCheck}`);
+              return {
+                type: 'text',
+                text: c.text,
+                providerMetadata: {
+                  ...(contentProviderData ?? {}),
+                },
+              };
             }),
           providerMetadata: {
             ...(providerData ?? {}),
diff --git a/packages/agents-openai/src/openaiChatCompletionsConverter.ts b/packages/agents-openai/src/openaiChatCompletionsConverter.ts
index bfa44525..6f022db5 100644
--- a/packages/agents-openai/src/openaiChatCompletionsConverter.ts
+++ b/packages/agents-openai/src/openaiChatCompletionsConverter.ts
@@ -37,7 +37,7 @@ export function extractAllAssistantContent(
   }
   const out: ChatCompletionAssistantMessageParam['content'] = [];
   for (const c of content) {
-    if (c.type === 'output_text' || c.type === 'input_text') {
+    if (c.type === 'output_text') {
       out.push({
         type: 'text',
         text: c.text,