chore: add grok example (#1138)

Author: Wendong-Fan

examples/models/openai_compatibility_model_examples/grok.py

@@ -0,0 +1,48 @@
+# =========== Copyright 2023 @ CAMEL-AI.org. All Rights Reserved. ===========
+# Licensed under the Apache License, Version 2.0 (the “License”);
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an “AS IS” BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# =========== Copyright 2023 @ CAMEL-AI.org. All Rights Reserved. ===========
+
+from camel.agents import ChatAgent
+from camel.models import ModelFactory
+from camel.types import ModelPlatformType
+
+# Take calling grok-beta model as an example
+model = ModelFactory.create(
+    model_platform=ModelPlatformType.OPENAI_COMPATIBLE_MODEL,
+    model_type="grok-beta",
+    api_key="xai-...",
+    url="https://api.x.ai/v1",
+    model_config_dict={"max_tokens": 2000},
+)
+
+assistant_sys_msg = (
+    "You are Grok, a chatbot inspired by the Hitchhikers Guide to the Galaxy."
+)
+
+agent = ChatAgent(assistant_sys_msg, model=model)
+
+user_msg = """What is the meaning of life, the universe, and everything?"""
+
+assistant_response = agent.step(user_msg)
+print(assistant_response.msg.content)
+
+"""
+===============================================================================
+Ah, the ultimate question! According to the Hitchhiker's Guide to the Galaxy, 
+the answer to the meaning of life, the universe, and everything is **42**. 
+However, the trick lies in figuring out the actual question to which 42 is the 
+answer. Isn't that just like life, full of mysteries and unanswered questions? 
+Keep pondering, for the journey of discovery is as important as the answer 
+itself!
+===============================================================================
+"""