diff --git a/AI21.py b/AI21.py
index 8ffe856..435bc33 100644
--- a/AI21.py
+++ b/AI21.py
@@ -2,25 +2,19 @@ import APIKey
 
 
 async def check_ai21(key: APIKey, session):
-    url = "https://api.ai21.com/studio/v1/j2-light/complete"
+    url = "https://api.ai21.com/studio/v1/chat/completions"
 
     payload = {
-        "prompt": "a",
-        "maxTokens": 1,
+        "messages": [],
+        "model": "jamba-1.5-large",
     }
     headers = {
-        "accept": "application/json",
-        "content-type": "application/json",
         "Authorization": f"Bearer {key.api_key}"
     }
 
-    async with session.post(url, json=payload, headers=headers) as response:
-        if response.status not in [200, 402]:
+    async with session.post(url, data=payload, headers=headers) as response:
+        if response.status not in [200, 422]:
             return
-
-        if response.status == 402:  # unsure if this error code also applies to empty keys
-            key.trial_elapsed = True
-
         return True
 
 
diff --git a/main.py b/main.py
index 114fdf5..7264603 100644
--- a/main.py
+++ b/main.py
@@ -202,6 +202,7 @@ async def execute_with_retries(func, key, sem, retries):
 oai_regex = re.compile(r'(sk-[a-zA-Z0-9_-]+T3BlbkFJ[a-zA-Z0-9_-]+)')
 anthropic_regex = re.compile(r'sk-ant-api03-[A-Za-z0-9\-_]{93}AA')
 anthropic_secondary_regex = re.compile(r'sk-ant-[A-Za-z0-9\-_]{86}')
+anthropic_third_regex = re.compile(r'sk-[A-Za-z0-9]{86}')
 ai21_and_mistral_regex = re.compile('[A-Za-z0-9]{32}')
 elevenlabs_regex = re.compile(r'([a-z0-9]{32})')
 elevenlabs_secondary_regex = re.compile(r'sk_[a-z0-9]{48}')
@@ -244,11 +245,15 @@ async def validate_keys():
             key_obj = APIKey(Provider.OPENROUTER, key)
             tasks.append(execute_with_retries(validate_openrouter, key_obj, concurrent_connections, 5))
         elif "sk-" in key:
-            match = oai_regex.match(key)
+            anthropic_flag = "T3BlbkFJ" not in key
+            if anthropic_flag:
+                match = anthropic_third_regex.match(key)
+            else:
+                match = oai_regex.match(key)
             if not match:
                 continue
-            key_obj = APIKey(Provider.OPENAI, key)
-            tasks.append(execute_with_retries(validate_openai, key_obj, concurrent_connections, 5))
+            key_obj = APIKey(Provider.ANTHROPIC if anthropic_flag else Provider.OPENAI, key)
+            tasks.append(execute_with_retries(validate_anthropic if anthropic_flag else validate_openai, key_obj, concurrent_connections, 5))
         elif ":" and "AKIA" in key:
             match = aws_regex.match(key)
             if not match: