# GPT Audio 1.5 API Pricing

As of October 10, 2026, GPT Audio 1.5 costs $2.50 per 1M input tokens and $10.00 per 1M output tokens on OpenAI. It has a 128,000-token context window and returns up to 16,384 tokens per response.

- Page: https://models.litellm.ai/models/gpt-audio-1.5
- Lab: OpenAI
- LiteLLM model name: `gpt-audio-1.5`
- Context window: 128,000 tokens
- Max output: 16,384 tokens
- Added to LiteLLM: February 2026
- 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 |
|---|---|---|---|---|---|---|---|
| OpenAI | `gpt-audio-1.5` | $2.50 | $10.00 | – | – | – | 128K |
| Azure OpenAI | `azure/gpt-audio-1.5` | $2.50 | $10.00 | – | – | – | 128K |
| Azure OpenAI (snapshot 2026-02-23) | `azure/gpt-audio-1.5-2026-02-23` | $2.50 | $10.00 | – | – | – | 128K |

## Cost examples

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

- OpenAI: $10.00
- Azure OpenAI: $10.00

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

- OpenAI: $27.00
- Azure OpenAI: $27.00

## Features

Supported: Function calling, Parallel tool calls, Audio input, Audio output.
Not supported: Structured output, Image input, Reasoning, Prompt caching.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="gpt-audio-1.5",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does GPT Audio 1.5 cost?

GPT Audio 1.5 costs $2.50 per 1M input tokens and $10.00 per 1M output tokens on OpenAI.

### What is the context window of GPT Audio 1.5?

GPT Audio 1.5 has a 128,000-token context window and returns up to 16,384 tokens per response.

### Which providers offer GPT Audio 1.5?

GPT Audio 1.5 is available from 2 providers through LiteLLM: OpenAI and Azure OpenAI.

### How do I call GPT Audio 1.5 with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="gpt-audio-1.5", 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 Audio 1.5 support?

GPT Audio 1.5 supports function calling, parallel tool calls, audio input and audio output. It does not support structured output, image input, reasoning and prompt caching.

### When did LiteLLM add GPT Audio 1.5?

GPT Audio 1.5 was added to LiteLLM's model price file in February 2026.

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