# GPT Realtime 2 API Pricing

As of October 10, 2026, GPT Realtime 2 costs $4.00 per 1M input tokens and $24.00 per 1M output tokens on OpenAI, with cache reads at $0.40 per 1M tokens. It has a 128,000-token context window and returns up to 32,000 tokens per response.

- Page: https://models.litellm.ai/models/gpt-realtime-2
- Lab: OpenAI
- LiteLLM model name: `gpt-realtime-2`
- Context window: 128,000 tokens
- Max output: 32,000 tokens
- Added to LiteLLM: May 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-realtime-2` | $4.00 | $24.00 | $0.40 | – | – | 128K |
| Azure OpenAI | `azure/gpt-realtime-2` | $4.00 | $24.00 | $0.40 | – | – | 32K |

## Cost examples

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

- OpenAI: $20.00
- Azure OpenAI: $20.00

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

- OpenAI: $44.80
- Azure OpenAI: $44.80

## Features

Supported: Function calling, Parallel tool calls, Audio input, Audio output.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="gpt-realtime-2",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does GPT Realtime 2 cost?

GPT Realtime 2 costs $4.00 per 1M input tokens and $24.00 per 1M output tokens on OpenAI, with cache reads at $0.40 per 1M tokens.

### What is the context window of GPT Realtime 2?

GPT Realtime 2 has a 128,000-token context window and returns up to 32,000 tokens per response.

### Which providers offer GPT Realtime 2?

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

### How do I call GPT Realtime 2 with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="gpt-realtime-2", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/realtime from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does GPT Realtime 2 support?

GPT Realtime 2 supports function calling, parallel tool calls, audio input and audio output.

### When did LiteLLM add GPT Realtime 2?

GPT Realtime 2 was added to LiteLLM's model price file in May 2026.

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