[Bug]: Responses API needs a Resoning status not null

[rodriciru]

What happened?

A bug happened!
The output of litellm in responses API shows for example this JSON:

{
    "id": "resp_YU5J85ie8epCHNhDz1Gto1-Mo7pV4n1NywZr55ToJZiDASVqeETyB8Qv7nAlF3XNmm3qbLC0RLtiYQqyOT76LzPw-V5kq5RemYxoVj_o9gxPB5HXRPTe_2cXqdqgP_GAEj6T3A4k9pJbsPRPjkneRGAgKm-H_zEsXJMu8ShK5-KcmrPK2g_rFLL2VpGCTWrN_pucn0cc2qas6aAhvm1fErpBEnZUwfa-s1n6coJUdfoGuaA8RMIqJGfJ4LglGzRJn6TUpK-lUtLxP2_YXWu8HaNJSW1nc8J2aKmEdl7aBnev14fzUeck3_FJKbRgJuiqRiEl0glmDWCHJAj3Fcqrqu63yvGCPEB6_VhkXTOO1LSk2yujOCZK3K_KXiYo0GqhGmwN0f1R2gucSld8mNrBRYz-gDSyqR0O1aHCM1EljHEoMwBjDciH6Ng9WXQ-gyH-H4GjfRsR10e0nAOZ-RfCMiQl",
    "created_at": 1763559789,
    "error": null,
    "incomplete_details": null,
    "instructions": null,
    "metadata": {},
    "model": "gpt-5-mini-2025-08-07",
    "object": "response",
    "output": [
        {
            "id": "rs_00e1e4e99fe6806f00691dc96e266481949d50e6df0a09b51f",
            "summary": [],
            "type": "reasoning",
            "content": null,
            "encrypted_content": null,
            "status": null
        },
        {
            "id": "msg_00e1e4e99fe6806f00691dc97344f88194b2369d9a6ad3678d",
            "content": [
                {
                    "annotations": [],
                    "text": "\"AI\" (artificial intelligence) refers to computer systems that perform tasks which normally require human intelligence.",
                    "type": "output_text",
                    "logprobs": []
                }
            ],
            "role": "assistant",
            "status": "completed",
            "type": "message"
        }
    ],
    "parallel_tool_calls": true,
    "temperature": 1.0,
    "tool_choice": "auto",
    "tools": [],
    "top_p": 1.0,
    "max_output_tokens": null,
    "previous_response_id": null,
    "reasoning": {
        "effort": "medium",
        "summary": null
    },
    "status": "completed",
    "text": {
        "format": {
            "type": "text"
        },
        "verbosity": "medium"
    },
    "truncation": "disabled",
    "usage": {
        "input_tokens": 10,
        "input_tokens_details": {
            "audio_tokens": null,
            "cached_tokens": 0,
            "text_tokens": null
        },
        "output_tokens": 1158,
        "output_tokens_details": {
            "reasoning_tokens": 320,
            "text_tokens": null
        },
        "total_tokens": 1168,
        "cost": null
    },
    "user": null,
    "store": true,
    "background": false,
    "billing": {
        "payer": "developer"
    },
    "max_tool_calls": null,
    "prompt_cache_key": null,
    "prompt_cache_retention": null,
    "safety_identifier": null,
    "service_tier": "default",
    "top_logprobs": 0
}

Output (of type reasoning) -> status is null. It can't be. It must be one of in_progress, completed, or incomplete

So, when I try to use litellm endpoint in my c# code with the official SDK package, it breaks:
Unknown ReasoningStatus value. (Parameter 'value')

Relevant log output

Are you a ML Ops Team?

No

What LiteLLM version are you on ?

1.79.3

Twitter / LinkedIn details

No response