403 Forbidden - AI Gateway playground works, but no API requests go through. - Help

I am using the Vercel AI Gateway on the hobby plan (with the $5 free credits). I have my debit card connected to billing and the AI Gateway playground (https://ai-sdk.dev/playground) works on my team, but the AI SDK / OpenAI endpoints return 403 Forbidden.

A day ago, this worked on my account, but now it is broken.

1import os2from openai import OpenAI3client = OpenAI(4    api_key='vck_mykey',5    base_url='https://ai-gateway.vercel.sh/v1',6)7response = client.chat.completions.create(8    model='deepseek/deepseek-v4-flash',9    messages=[{'role': 'user', 'content': 'Tell me a joke about Python developers.'}],10    stream=True,11)12for chunk in response:13    content = chunk.choices[0].delta.content14    if content:15        print(content, end='', flush=True)

Output of above:

1openai.PermissionDeniedError: Error code: 403 - {'error': {'message': 'Forbidden.', 'type': 'access_denied'}}

A day ago, this worked on my account, but now it is broken.

1import os2from openai import OpenAI3client = OpenAI(4    api_key='vck_mykey',5    base_url='https://ai-gateway.vercel.sh/v1',6)7response = client.chat.completions.create(8    model='deepseek/deepseek-v4-flash',9    messages=[{'role': 'user', 'content': 'Tell me a joke about Python developers.'}],10    stream=True,11)12for chunk in response:13    content = chunk.choices[0].delta.content14    if content:15        print(content, end='', flush=True)

Output of above:

1openai.PermissionDeniedError: Error code: 403 - {'error': {'message': 'Forbidden.', 'type': 'access_denied'}}