Allow setting can_stream in extra-openai-models.yaml to allow for o1 over proxy

[cmungall]

o1 support was added in response to

• 570

However, this hardwires the streamability to named o1 models. I am accessing o1-preview via a (litellm) proxy, so I get a 'message': 'litellm.BadRequestError: AzureException BadRequestError - Error code: 400 - {\'error\': {\'message\': "Unsupported value: \'stream\' does not support true with this model. Only the default (false) value is supported.", \'type\': \'invalid_request_error\'

I believe I need to be able to do this

- model_name: openai/o1
  model_id: lbl/o1
  api_base: <MY PROXY>
  api_key_name: <MY KEY NAME>
  can_stream: false

however, can_stream is currently ignored

[simonw]

Here's how I tested this: I added this to my extra-openai-models.yaml file:

- model_id: o1-via-proxy
  model_name: o1-preview
  api_base: "http://localhost:8040/v1"
  api_key_name: openai
  can_stream: false

Then I ran a proxy on port 8040 like this:

uv run --with asgi-proxy-lib==0.2a0 \
  python -m asgi_proxy \
  https://api.openai.com -p 8040 -v

And tested it like this:

llm -m o1-via-proxy 'just say hi' 

Output:

Hi there! How can I assist you today?

While my proxy server showed:

INFO:httpx:HTTP Request: POST https://api.openai.com/v1/chat/completions "HTTP/1.1 200 OK"
INFO:root:Request: POST https://api.openai.com/v1/chat/completions
INFO:root:Response: 200 OK
INFO:     127.0.0.1:52683 - "POST /v1/chat/completions HTTP/1.1" 200 OK

I had to fix this issue first though:

• https://github.com/simonw/asgi-proxy-lib/issues/10