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 nvidia/nemotron-3.5-bolt-e4b

The Build playground adds its staging prefix automatically. Standalone gateway requests use stg/nvidia/nemotron-3.5-bolt-e4b.

messages

array of objects

required

length ≥ 1

Conversation messages. System and developer instructions, user messages, assistant responses, and tool results are supported. Include tool_call_id on tool results.

Messages*

role

string

enum

required

The role of the message author.

Allowed:

content

string | array | null

Text or text content parts, or null for an assistant tool call.

name

string

tool_call_id

string

tool_calls

array of objects

tool_calls

reasoning_content

string | null

Reasoning text returned separately from the final answer.

function_call

object | null

Legacy assistant function call. Prefer tool_calls for new integrations.

temperature

number

0 to 2

Defaults to 1

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.

max_tokens

integer

1 to 65536

Defaults to 1024

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. The hosted function caps completion budgets at 65536 tokens.

seed

0 to 18446744073709552000

If specified, our system will make a best effort to sample deterministically, such that repeated requests with the same seed and parameters should return the same result.

stream

boolean

Defaults to true

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

array | string | null

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

tools

array of objects

Function definitions available for tool calling.

Tools

tool_choice

string | object

Automatically select a tool, disable tools, require a tool, or select a named function.

parallel_tool_calls

boolean

Defaults to true

Whether multiple tool calls may be generated in one response.

response_format

object

Use json_schema with a JSON schema to constrain structured output.

stream_options

object

Include token usage in streamed chunks or emit continuous usage updates.

chat_template_kwargs

object

Optional chat-template arguments. Set enable_thinking to true or false to control Bolt reasoning.

skip_special_tokens

boolean

Set to false for reasoning and tool parsing so the serving parser retains special-token boundaries.

Headers

string

enum

Defaults to application/json

Generated from available response content types

Allowed:

Responses

Language

Credentials

Bearer

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Response

Click Try It! to start a request and see the response here! Or choose an example:

application/json

text/event-stream

200Invocation is fulfilled

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

400Invalid request parameters, model alias, or messages.

422Validation failed, provided entity could not be processed.

500The invocation ended with an error.