Retrieve a model

You're Claude Code, working in my repository.

Task
Retrieve the configured model's metadata with GET /v1/models/{model} when this project starts, and stop with a clear message naming the id when the API answers 404 model_not_found.

Read this first
Meta's docs page "Retrieve a model" as Markdown: https://dev.meta.ai/docs/api-reference/models/retrieve-model.md
It's the source of truth for request and response shapes. The same page for people: https://dev.meta.ai/docs/api-reference/models/retrieve-model

Setup
- Base URL: https://api.meta.ai/v1
- Auth: send Authorization: Bearer $MODEL_API_KEY, reading MODEL_API_KEY from the environment. Never hard-code, print or commit the key.
- Model: muse-spark-1.3-contributor (Contributor mode: Meta may use what you send to train future models; drop -contributor for Standard mode)
- Python: the OpenAI SDK (pip install openai) with base_url="https://api.meta.ai/v1" and api_key=os.environ["MODEL_API_KEY"] works, or plain requests.

Facts to get right
- The reply is a Model: { "id": string, "object": "model", "created": integer (Unix seconds), "owned_by": string, "metadata"?: object }. created matches the value in GET /v1/models.
- The model path parameter is required. An unknown id returns 404 with type invalid_request_error and code model_not_found.
- Retrieving a model sends no prompt and costs nothing.

Starter code (Python)
import os
import sys

from openai import OpenAI

api_key = os.environ.get("MODEL_API_KEY")
if not api_key:
    sys.exit("Set MODEL_API_KEY to your Model API key first.")

client = OpenAI(base_url="https://api.meta.ai/v1", api_key=api_key)

response = client.models.retrieve("muse-spark-1.3-contributor")

print(response.model_dump_json(indent=2))

Done when
- Retrieving muse-spark-1.3-contributor prints its id, object, created and owned_by.
- A bogus id stops the app with the model_not_found message.
- The key comes from MODEL_API_KEY and never appears in code, logs or commits.
- API errors (4xx, 429) surface their message instead of failing silently.