---
title: "Advanced model features"
description: "Use streaming, vision, tools and structured output only when supported by the selected model."
lastUpdated: 2026-10-22
---

## Streaming

For compatible chat requests, set `stream: true` to receive output as it is generated. Consume the stream and close the connection when finished. Streaming can reduce the wait for the first visible text.

## Image understanding

Choose a model with image input support, then supply `image_url` content in the messages format accepted by that endpoint. Image pricing depends on the model; check [Models and pricing](https://infistar.ai/pricing).

## Tool calls

Define `tools` in the request. When the model returns `tool_calls`, your application executes the allowed tool and sends its result back to the model. The model's requested call does not itself execute your code.

## JSON output

For models supporting JSON mode, set `response_format` to `{ "type": "json_object" }` and explicitly request JSON in the system prompt. Validate the result before using it in your application.

## Length, temperature and reasoning

Set an output limit appropriate to the task. Temperature controls randomness where supported. Reasoning parameters and context limits are model-specific; do not assume every model accepts the same options.

See [API overview](/en/api-overview), [Authentication](/en/integration-guides/authentication-permissions) and [Gateway configuration](/en/integration-guides/gateway-config).