Using Responses API with providers other than OpenAI

[minhduc0711]

Is using Responses API with providers other than OpenAI officially supported? I have tested with Claude, and it seemed to work, but this is not mentioned anywhere in the documentation.

import litellm
r = litellm.responses(
    model="claude-3-5-haiku-20241022",
    input="hi, what's your name?",
)

# OUTPUT
# id='chatcmpl-dbd80681-1c45-42ec-9998-3a781e162c60' created_at=1757430212 error=None incomplete_details=None instructions=None metadata={} model='claude-3-5-haiku-20241022' object='chat.completion' output=[GenericResponseOutputItem(type='message', id='chatcmpl-dbd80681-1c45-42ec-9998-3a781e162c60', status='stop', role='assistant', content=[OutputText(type='output_text', text="I'm Claude, an AI created by Anthropic. I aim to be helpful, honest, and direct. How are you doing today?", annotations=[])])] parallel_tool_calls=False temperature=0.0 tool_choice='auto' tools=[] top_p=None max_output_tokens=None previous_response_id=None reasoning={} status='completed' text={} truncation=None usage=ResponseAPIUsage(input_tokens=14, input_tokens_details=None, output_tokens=32, output_tokens_details=None, total_tokens=46) user=None store=None