Creates a model response for the given chat conversation.

post

https://integrate.api.nvidia.com/v1/chat/completions

Given a list of messages comprising a conversation, the model will return a response. Compatible with OpenAI. See https://platform.openai.com/docs/api-reference/chat/create

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Body Params

model

string

Defaults to microsoft/phi-4-mini-flash-reasoning

messages

array of objects

required

A list of messages comprising the conversation so far. The roles of the messages must be alternating between user and assistant. The last input message should have role user. A message with the the system role is optional, and must be the very first message if it is present; context is also optional, but must come before a user question.

Messages*

temperature

number

0 to 1

Defaults to 0.6

The sampling temperature to use for text generation. The higher the temperature value is, the less deterministic the output text will be. It is not recommended to modify both temperature and top_p in the same call.

top_p

number

≤ 1

Defaults to 0.95

The top-p sampling mass used for text generation. The top-p value determines the probability mass that is sampled at sampling time. For example, if top_p = 0.2, only the most likely tokens (summing to 0.2 cumulative probability) will be sampled. It is not recommended to modify both temperature and top_p in the same call.

frequency_penalty

number

-2 to 2

Defaults to 0

Indicates how much to penalize new tokens based on their existing frequency in the text so far, decreasing model likelihood to repeat the same line verbatim.

presence_penalty

number

-2 to 2

Defaults to 0

Positive values penalize new tokens based on whether they appear in the text so far, increasing model likelihood to talk about new topics.

max_tokens

integer

1 to 16384

Defaults to 8192

The maximum number of tokens to generate in any given call. Note that the model is not aware of this value, and generation will simply stop at the number of tokens specified.

stream

boolean

Defaults to false

If set, partial message deltas will be sent. Tokens will be sent as data-only server-sent events (SSE) as they become available (JSON responses are prefixed by data: ), with the stream terminated by a data: [DONE] message.

stop

A string or a list of strings where the API will stop generating further tokens. The returned text will not contain the stop sequence.

Headers

string

enum

Defaults to application/json

Generated from available response content types

Allowed:

Responses

200Invocation is fulfilled

202Result is pending. Client should poll using the requestId.

422Validation failed, provided entity could not be processed.

500The invocation ended with an error.