feat: Add missing Anthropic models (Claude Sonnet 4, Claude Opus 4) (#6585)

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## Why are these changes needed?

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## Related issue number

resolved #6584

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<https://microsoft.github.io/autogen/>. See
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Author: withsmilo

python/packages/autogen-core/src/autogen_core/models/_model_client.py

@@ -38,6 +38,8 @@ class ModelFamily:
     CLAUDE_3_5_HAIKU = "claude-3-5-haiku"
     CLAUDE_3_5_SONNET = "claude-3-5-sonnet"
     CLAUDE_3_7_SONNET = "claude-3-7-sonnet"
+    CLAUDE_4_OPUS = "claude-4-opus"
+    CLAUDE_4_SONNET = "claude-4-sonnet"
     LLAMA_3_3_8B = "llama-3.3-8b"
     LLAMA_3_3_70B = "llama-3.3-70b"
     LLAMA_4_SCOUT = "llama-4-scout"
@@ -73,6 +75,8 @@ class ModelFamily:
         "claude-3-5-haiku",
         "claude-3-5-sonnet",
         "claude-3-7-sonnet",
+        "claude-4-opus",
+        "claude-4-sonnet",
         # llama_models
         "llama-3.3-8b",
         "llama-3.3-70b",
@@ -100,6 +104,8 @@ def is_claude(family: str) -> bool:
             ModelFamily.CLAUDE_3_5_HAIKU,
             ModelFamily.CLAUDE_3_5_SONNET,
             ModelFamily.CLAUDE_3_7_SONNET,
+            ModelFamily.CLAUDE_4_OPUS,
+            ModelFamily.CLAUDE_4_SONNET,
         )
 
     @staticmethod

python/packages/autogen-ext/src/autogen_ext/models/anthropic/_model_info.py

@@ -6,6 +6,42 @@
 # For Anthropic's Claude models based on:
 # https://docs.anthropic.com/claude/docs/models-overview
 _MODEL_INFO: Dict[str, ModelInfo] = {
+    # Claude 4 Opus
+    "claude-opus-4-20250514": {
+        "vision": True,
+        "function_calling": True,
+        "json_output": True,
+        "family": ModelFamily.CLAUDE_4_OPUS,
+        "structured_output": False,
+        "multiple_system_messages": False,
+    },
+    # Claude 4 Opus latest alias
+    "claude-opus-4-0": {
+        "vision": True,
+        "function_calling": True,
+        "json_output": True,
+        "family": ModelFamily.CLAUDE_4_OPUS,
+        "structured_output": False,
+        "multiple_system_messages": False,
+    },
+    # Claude 4 Sonnet
+    "claude-sonnet-4-20250514": {
+        "vision": True,
+        "function_calling": True,
+        "json_output": True,
+        "family": ModelFamily.CLAUDE_4_SONNET,
+        "structured_output": False,
+        "multiple_system_messages": False,
+    },
+    # Claude 4 Sonnet latest alias
+    "claude-sonnet-4-0": {
+        "vision": True,
+        "function_calling": True,
+        "json_output": True,
+        "family": ModelFamily.CLAUDE_4_SONNET,
+        "structured_output": False,
+        "multiple_system_messages": False,
+    },
     # Claude 3.7 Sonnet
     "claude-3-7-sonnet-20250219": {
         "vision": True,

python/packages/autogen-ext/src/autogen_ext/models/openai/_model_info.py

@@ -36,6 +36,8 @@
     "claude-3-5-haiku": "claude-3-5-haiku-20241022",
     "claude-3-5-sonnet": "claude-3-5-sonnet-20241022",
     "claude-3-7-sonnet": "claude-3-7-sonnet-20250219",
+    "claude-4-sonnet": "claude-sonnet-4-20250514",
+    "claude-4-opus": "claude-opus-4-20250514",
     # Llama models
     "llama-3.3-8b": "Llama-3.3-8B-Instruct",
     "llama-3.3-70b": "Llama-3.3-70B-Instruct",
@@ -364,6 +366,22 @@
         "structured_output": False,
         "multiple_system_messages": True,
     },
+    "claude-sonnet-4-20250514": {
+        "vision": True,
+        "function_calling": True,
+        "json_output": False,  # Update this when Anthropic supports structured output
+        "family": ModelFamily.CLAUDE_4_SONNET,
+        "structured_output": False,
+        "multiple_system_messages": True,
+    },
+    "claude-opus-4-20250514": {
+        "vision": True,
+        "function_calling": True,
+        "json_output": False,  # Update this when Anthropic supports structured output
+        "family": ModelFamily.CLAUDE_4_OPUS,
+        "structured_output": False,
+        "multiple_system_messages": True,
+    },
     "Llama-3.3-8B-Instruct": {
         "vision": False,
         "function_calling": True,
@@ -432,11 +450,13 @@
     "gemini-2.5-pro-preview-03-25": 2097152,
     "gemini-2.5-flash-preview-05-20": 1048576,
     "claude-3-haiku-20240307": 50000,
-    "claude-3-sonnet-20240229": 40000,
-    "claude-3-opus-20240229": 20000,
-    "claude-3-5-haiku-20241022": 50000,
-    "claude-3-5-sonnet-20241022": 40000,
-    "claude-3-7-sonnet-20250219": 20000,
+    "claude-3-sonnet-20240229": 200000,
+    "claude-3-opus-20240229": 200000,
+    "claude-3-5-haiku-20241022": 200000,
+    "claude-3-5-sonnet-20241022": 200000,
+    "claude-3-7-sonnet-20250219": 200000,
+    "claude-sonnet-4-20250514": 200000,
+    "claude-opus-4-20250514": 200000,
     "Llama-3.3-8B-Instruct": 128000,
     "Llama-3.3-70B-Instruct": 128000,
     "Llama-4-Scout-17B-16E-Instruct-FP8": 128000,