# GPT-4.5 Preview API Pricing

As of October 10, 2026, GPT-4.5 Preview costs $75.00 per 1M input tokens and $150.00 per 1M output tokens on Azure OpenAI, with cache reads at $37.50 per 1M tokens. It has a 128,000-token context window and returns up to 16,384 tokens per response.

- Page: https://models.litellm.ai/models/gpt-4.5-preview
- Lab: OpenAI
- LiteLLM model name: `azure/gpt-4.5-preview`
- Context window: 128,000 tokens
- Max output: 16,384 tokens
- Added to LiteLLM: March 2025
- Deprecation date: July 14, 2025
- Prices updated: October 10, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| Azure OpenAI | `azure/gpt-4.5-preview` | $75.00 | $150.00 | $37.50 | – | – | 128K |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- Azure OpenAI: $225.00
- Azure OpenAI batch: $112.50

100 long-document requests with 100,000 input and 2,000 output tokens each:

- Azure OpenAI: $780.00

## Features

Supported: Function calling, Parallel tool calls, Structured output, Image input, Prompt caching.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="azure/gpt-4.5-preview",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does GPT-4.5 Preview cost?

GPT-4.5 Preview costs $75.00 per 1M input tokens and $150.00 per 1M output tokens on Azure OpenAI, with cache reads at $37.50 per 1M tokens. Batch requests cost $37.50 per 1M input tokens and $75.00 per 1M output tokens.

### What is the context window of GPT-4.5 Preview?

GPT-4.5 Preview has a 128,000-token context window and returns up to 16,384 tokens per response.

### Which providers offer GPT-4.5 Preview?

GPT-4.5 Preview is available from Azure OpenAI through LiteLLM, using the model name azure/gpt-4.5-preview.

### How do I call GPT-4.5 Preview with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="azure/gpt-4.5-preview", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does GPT-4.5 Preview support?

GPT-4.5 Preview supports function calling, parallel tool calls, structured output, image input and prompt caching.

### When did LiteLLM add GPT-4.5 Preview?

GPT-4.5 Preview was added to LiteLLM's model price file in March 2025.

### Is GPT-4.5 Preview being deprecated?

Azure OpenAI deprecated azure/gpt-4.5-preview on July 14, 2025.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json