diff --git a/packages/ai/src/models.generated.ts b/packages/ai/src/models.generated.ts
index a8757dee..0dbf2b7d 100644
--- a/packages/ai/src/models.generated.ts
+++ b/packages/ai/src/models.generated.ts
@@ -141,6 +141,23 @@ export const MODELS = {
 			contextWindow: 200000,
 			maxTokens: 4096,
 		} satisfies Model<"anthropic-messages">,
+		"claude-opus-4-5-20251101": {
+			id: "claude-opus-4-5-20251101",
+			name: "Claude Opus 4.5",
+			api: "anthropic-messages",
+			provider: "anthropic",
+			baseUrl: "https://api.anthropic.com",
+			reasoning: true,
+			input: ["text", "image"],
+			cost: {
+				input: 5,
+				output: 25,
+				cacheRead: 0.5,
+				cacheWrite: 6.25,
+			},
+			contextWindow: 200000,
+			maxTokens: 64000,
+		} satisfies Model<"anthropic-messages">,
 		"claude-sonnet-4-5": {
 			id: "claude-sonnet-4-5",
 			name: "Claude Sonnet 4.5 (latest)",
@@ -2023,7 +2040,7 @@ export const MODELS = {
 				cacheWrite: 6.25,
 			},
 			contextWindow: 200000,
-			maxTokens: 32000,
+			maxTokens: 64000,
 		} satisfies Model<"openai-completions">,
 		"allenai/olmo-3-7b-instruct": {
 			id: "allenai/olmo-3-7b-instruct",
diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 4d69c5d8..1c176ab7 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- **Prompt Restoration on API Key Error**: When submitting a message fails due to missing API key, the prompt is now restored to the editor instead of being lost. ([#77](https://github.com/badlogic/pi-mono/issues/77))
+
 ## [0.10.2] - 2025-11-27
 
 ### Changed
diff --git a/packages/coding-agent/src/tui/tui-renderer.ts b/packages/coding-agent/src/tui/tui-renderer.ts
index e0a9e7c0..ab9ae524 100644
--- a/packages/coding-agent/src/tui/tui-renderer.ts
+++ b/packages/coding-agent/src/tui/tui-renderer.ts
@@ -418,6 +418,7 @@ export class TuiRenderer {
 					`No API key found for ${currentModel.provider}.\n\n` +
 						`Set the appropriate environment variable or update ~/.pi/agent/models.json`,
 				);
+				this.editor.setText(text);
 				return;
 			}