diff --git a/pr_agent/algo/__init__.py b/pr_agent/algo/__init__.py
index e38bd713..dbda2f43 100644
--- a/pr_agent/algo/__init__.py
+++ b/pr_agent/algo/__init__.py
@@ -53,9 +53,11 @@ MAX_TOKENS = {
     'vertex_ai/claude-3-5-haiku@20241022': 100000,
     'vertex_ai/claude-3-sonnet@20240229': 100000,
     'vertex_ai/claude-3-opus@20240229': 100000,
+    'vertex_ai/claude-opus-4@20250514': 200000,
     'vertex_ai/claude-3-5-sonnet@20240620': 100000,
     'vertex_ai/claude-3-5-sonnet-v2@20241022': 100000,
     'vertex_ai/claude-3-7-sonnet@20250219': 200000,
+    'vertex_ai/claude-sonnet-4@20250514': 200000,
     'vertex_ai/gemini-1.5-pro': 1048576,
     'vertex_ai/gemini-2.5-pro-preview-03-25': 1048576,
     'vertex_ai/gemini-2.5-pro-preview-05-06': 1048576,
@@ -74,22 +76,28 @@ MAX_TOKENS = {
     'anthropic.claude-v1': 100000,
     'anthropic.claude-v2': 100000,
     'anthropic/claude-3-opus-20240229': 100000,
+    'anthropic/claude-opus-4-20250514': 200000,
     'anthropic/claude-3-5-sonnet-20240620': 100000,
     'anthropic/claude-3-5-sonnet-20241022': 100000,
     'anthropic/claude-3-7-sonnet-20250219': 200000,
+    'anthropic/claude-sonnet-4-20250514': 200000,
     'claude-3-7-sonnet-20250219': 200000,
     'anthropic/claude-3-5-haiku-20241022': 100000,
     'bedrock/anthropic.claude-instant-v1': 100000,
     'bedrock/anthropic.claude-v2': 100000,
     'bedrock/anthropic.claude-v2:1': 100000,
     'bedrock/anthropic.claude-3-sonnet-20240229-v1:0': 100000,
+    'bedrock/anthropic.claude-opus-4-20250514-v1:0': 200000,
     'bedrock/anthropic.claude-3-haiku-20240307-v1:0': 100000,
     'bedrock/anthropic.claude-3-5-haiku-20241022-v1:0': 100000,
     'bedrock/anthropic.claude-3-5-sonnet-20240620-v1:0': 100000,
     'bedrock/anthropic.claude-3-5-sonnet-20241022-v2:0': 100000,
     'bedrock/anthropic.claude-3-7-sonnet-20250219-v1:0': 200000,
+    'bedrock/anthropic.claude-sonnet-4-20250514-v1:0': 200000,
+    "bedrock/us.anthropic.claude-opus-4-20250514-v1:0": 200000,
     "bedrock/us.anthropic.claude-3-5-sonnet-20241022-v2:0": 100000,
     "bedrock/us.anthropic.claude-3-7-sonnet-20250219-v1:0": 200000,
+    "bedrock/us.anthropic.claude-sonnet-4-20250514-v1:0": 200000,
     'claude-3-5-sonnet': 100000,
     'groq/meta-llama/llama-4-scout-17b-16e-instruct': 131072,
     'groq/meta-llama/llama-4-maverick-17b-128e-instruct': 131072,
diff --git a/requirements.txt b/requirements.txt
index 95145ec9..d1587f25 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 aiohttp==3.9.5
-anthropic>=0.48
+anthropic>=0.52.0
 #anthropic[vertex]==0.47.1
 atlassian-python-api==3.41.4
 azure-devops==7.1.0b3
@@ -13,7 +13,7 @@ google-cloud-aiplatform==1.38.0
 google-generativeai==0.8.3
 google-cloud-storage==2.10.0
 Jinja2==3.1.2
-litellm==1.69.3
+litellm==1.70.4
 loguru==0.7.2
 msrest==0.7.1
 openai>=1.55.3