Create a chat completion
Generate a model response from a conversation supplied as a list of messages.
POST /chat/completions
Generate a chat completion.
Request body
Content Type: application/json
Response
HTTP 200: OK
Content Type: application/json
Content Type: text/event-stream
CreateChatCompletionStreamResponse
python
import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.meta.ai/v1",
api_key=os.environ["MODEL_API_KEY"],
)
response = client.chat.completions.create(
model="muse-spark-1.3",
messages=[
{
"role": "user",
"content": "What are three differences between TCP and UDP?",
},
],
)
print(response.model_dump_json(indent=2))import json
import os
import requests
response = requests.post(
"https://api.meta.ai/v1/chat/completions",
headers={
"Authorization": f"Bearer {os.environ['MODEL_API_KEY']}",
"Content-Type": "application/json",
},
json={
"model": "muse-spark-1.3",
"messages": [
{
"role": "user",
"content": "What are three differences between TCP and UDP?",
},
],
},
)
response.raise_for_status()
print(json.dumps(response.json(), indent=2))curl -X POST "https://api.meta.ai/v1/chat/completions" \
-H "Authorization: Bearer $MODEL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "muse-spark-1.3",
"messages": [
{
"role": "user",
"content": "What are three differences between TCP and UDP?"
}
]
}'For usage examples, streaming, multi-turn conversations, and parameter guidance, see the Chat completion feature page.
Mirrored from dev.meta.ai/docs/api-reference/chat-completions/create-chat-completion (synced Oct 30, 2026). Text and examples © Meta. Live demos run on Muse Muse's key.