LiteLLMModels

GPT-4o Realtime Preview API Pricing

As of October 10, 2026, GPT-4o Realtime Preview costs $5.00 per 1M input tokens and $20.00 per 1M output tokens on Azure OpenAI, with cache reads at $2.50 per 1M tokens. It has a 128,000-token context window and returns up to 4,096 tokens per response.

By OpenAIModel ID azure/gpt-4o-realtime-preview-2024-10-01Prices updated Checked
Deprecated: Azure OpenAI lists March 26, 2025 as the deprecation date for azure/gpt-4o-realtime-preview-2024-10-01.
Input
$5.00 / 1M tokens
Output
$20.00 / 1M tokens
Cache read
$2.50 / 1M tokens
Context window
128,000 tokens
Max output
4,096 tokens
Providers
1
Added to LiteLLM
December 2024

GPT-4o Realtime Preview pricing by provider

6 listings across 1 provider. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

ProviderModel name in LiteLLMInputOutputCache readContext
Azure OpenAIsnapshot 2024-10-01azure/gpt-4o-realtime-preview-2024-10-01$5.00$20.00$2.50128K
Azure OpenAIsnapshot 2024-12-17azure/gpt-4o-realtime-preview-2024-12-17$5.00$20.00$2.5016K
Azure OpenAIeu, snapshot 2024-10-01azure/eu/gpt-4o-realtime-preview-2024-10-01$5.50$22.00$2.75128K
Azure OpenAIeu, snapshot 2024-12-17azure/eu/gpt-4o-realtime-preview-2024-12-17$5.50$22.00$2.7516K
Azure OpenAIus, snapshot 2024-10-01azure/us/gpt-4o-realtime-preview-2024-10-01$5.50$22.00$2.75128K
Azure OpenAIus, snapshot 2024-12-17azure/us/gpt-4o-realtime-preview-2024-12-17$5.50$22.00$2.7516K

Other GPT-4o Realtime Preview prices on Azure OpenAI

Audio input$100.00 per 1M tokens
Audio output$200.00 per 1M tokens

What GPT-4o Realtime Preview costs in practice

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

Azure OpenAI$20.00

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

Azure OpenAI$54.00

GPT-4o Realtime Preview features

Use GPT-4o Realtime Preview with LiteLLM

Call GPT-4o Realtime Preview through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/realtime. LiteLLM tracks the cost of every request at these prices.

Python SDK
from litellm import completion

response = completion(
    model="azure/gpt-4o-realtime-preview-2024-10-01",
    messages=[{"role": "user", "content": "Hello!"}],
)
Proxy config.yaml
model_list:
  - model_name: gpt-4o-realtime-preview
    litellm_params:
      model: azure/gpt-4o-realtime-preview-2024-10-01
      api_base: os.environ/AZURE_API_BASE
      api_key: os.environ/AZURE_API_KEY
Call the proxy
curl http://0.0.0.0:4000/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-1234" \
  -d '{
    "model": "gpt-4o-realtime-preview",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

GPT-4o Realtime Preview FAQ

How much does GPT-4o Realtime Preview cost?

GPT-4o Realtime Preview costs $5.00 per 1M input tokens and $20.00 per 1M output tokens on Azure OpenAI, with cache reads at $2.50 per 1M tokens.

What is the context window of GPT-4o Realtime Preview?

GPT-4o Realtime Preview has a 128,000-token context window and returns up to 4,096 tokens per response.

Which providers offer GPT-4o Realtime Preview?

GPT-4o Realtime Preview is available from Azure OpenAI through LiteLLM, using the model name azure/gpt-4o-realtime-preview-2024-10-01.

How do I call GPT-4o Realtime Preview with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="azure/gpt-4o-realtime-preview-2024-10-01", 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-4o Realtime Preview support?

GPT-4o Realtime Preview supports function calling, parallel tool calls, audio input and audio output.

When did LiteLLM add GPT-4o Realtime Preview?

GPT-4o Realtime Preview was added to LiteLLM's model price file in December 2024.

Is GPT-4o Realtime Preview being deprecated?

Azure OpenAI deprecated azure/gpt-4o-realtime-preview-2024-10-01 on March 26, 2025.

Sources

Prices come from LiteLLM's open-source model_prices_and_context_window.json, which LiteLLM uses to calculate the cost of every request. Provider pricing pages:

LiteLLM docs: Azure OpenAI.

Provider pages: Azure OpenAI.