diff --git a/docs/core/configuration.md b/docs/core/configuration.md
index b9280476..5b8184bc 100644
--- a/docs/core/configuration.md
+++ b/docs/core/configuration.md
@@ -22,7 +22,7 @@ These are the main pieces of information the core `Config` object holds and uses
 
 - **`model` (string):**
 
-  - **Source:** Command-line argument (`--model`), environment variable (`GEMINI_MODEL`), or a default value (e.g., `gemini-2.5-pro-preview-05-06`).
+  - **Source:** Command-line argument (`--model`), environment variable (`GEMINI_MODEL`), or a default value (e.g., `gemini-2.5-pro-preview-06-05`).
   - **Purpose:** Specifies which Gemini model the core should use. (For Vertex AI model names and usage, refer to the main README.md).
 
 - **`sandbox` (boolean | string):**
diff --git a/packages/cli/src/config/config.ts b/packages/cli/src/config/config.ts
index dd55b26d..387325d7 100644
--- a/packages/cli/src/config/config.ts
+++ b/packages/cli/src/config/config.ts
@@ -34,7 +34,7 @@ const logger = {
   error: (...args: any[]) => console.error('[ERROR]', ...args),
 };
 
-export const DEFAULT_GEMINI_MODEL = 'gemini-2.5-pro-preview-05-06';
+export const DEFAULT_GEMINI_MODEL = 'gemini-2.5-pro-preview-06-05';
 export const DEFAULT_GEMINI_FLASH_MODEL = 'gemini-2.5-flash-preview-05-20';
 
 interface CliArgs {
diff --git a/packages/core/src/core/tokenLimits.ts b/packages/core/src/core/tokenLimits.ts
index 56882c21..0fe99876 100644
--- a/packages/core/src/core/tokenLimits.ts
+++ b/packages/core/src/core/tokenLimits.ts
@@ -17,6 +17,7 @@ export function tokenLimit(model: Model): TokenCount {
       return 2_097_152;
     case 'gemini-1.5-flash':
     case 'gemini-2.5-pro-preview-05-06':
+    case 'gemini-2.5-pro-preview-06-05':
     case 'gemini-2.5-flash-preview-05-20':
     case 'gemini-2.0-flash':
       return 1_048_576;