Name: Chat GPT 4.5 preview API
Brand: OpenAI

How to use Chat GPT 4.5 preview API

Install any OpenAI-compatible SDK, point it at api.aimlapi.com/v1, and set the model to .

OpenAI-compatible — swap the base URL and it works with your existing SDK.

Chat GPT 4.5 preview API Pricing

Type	Price
Input
Output

Model	Input	Output	Context	Best for
Chat GPT 4.5 preview This page
GPT-5.5	$6.5 / 1M tokens	$39 / 1M tokens	1.05M tokens	Reasoning + agents
Claude Sonnet 5	$2.6 / 1M tokens	$13 / 1M tokens	1M tokens	Balanced coding + agents
Kimi K3	$3.9 / 1M tokens	$19.5 / 1M tokens	1M tokens	Long-context, multimodal & agentic workflows
Gemini 3.5 Flash	$0.65 / 1M tokens	$3.9 / 1M tokens	1.05M tokens	Reasoning + agents

Yes, Chat GPT 4.5 preview can stream responses as they are generated.

Yes, Chat GPT 4.5 preview supports both function calling and structured outputs.

Chat GPT 4.5 preview was built by OpenAI.

It is accessed through OpenAI's v1 API endpoint.