diff --git a/README.md b/README.md
index a6224c0..cb80257 100644
--- a/README.md
+++ b/README.md
@@ -100,8 +100,8 @@ For more control, use optional parameters:
 
 - `claude-sonnet-4-20250514`
 - `claude-sonnet-4-20250514-thinking`
-- `claude-opus-4-20250514`
-- `claude-opus-4-20250514-thinking`
+- `claude-opus-4-1-20250805`
+- `claude-opus-4-1-20250805-thinking`
 - `gpt-4.1`
 - `o4-mini-2025-04-16`
 - `o3-pro-2025-06-10`
diff --git a/src/providers/index.ts b/src/providers/index.ts
index fc49923..4f09c68 100644
--- a/src/providers/index.ts
+++ b/src/providers/index.ts
@@ -14,8 +14,8 @@ export enum ModelProvider {
 export enum ModelName {
 	Claude_4_Sonnet = 'claude-sonnet-4-20250514',
 	Claude_4_Sonnet_thinking = 'claude-sonnet-4-20250514-thinking',
-	Claude_4_Opus = 'claude-opus-4-20250514',
-	Claude_4_Opus_thinking = 'claude-opus-4-20250514-thinking',
+	Claude_4_Opus = 'claude-opus-4-1-20250805',
+	Claude_4_Opus_thinking = 'claude-opus-4-1-20250805-thinking',
 	GPT_4_1 = 'gpt-4.1',
 	GPT_o4_Mini = 'o4-mini-2025-04-16',
 	GPT_o3_Pro = 'o3-pro-2025-06-10',