# GPT-5.5 Pro API Pricing

As of October 10, 2026, GPT-5.5 Pro costs $30.00 per 1M input tokens and $180.00 per 1M output tokens on OpenAI. It has a 1,050,000-token context window and returns up to 128,000 tokens per response.

- Page: https://models.litellm.ai/models/gpt-5.5-pro
- Lab: OpenAI
- LiteLLM model name: `gpt-5.5-pro`
- Context window: 1,050,000 tokens
- Max output: 128,000 tokens
- Added to LiteLLM: April 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-5.5-pro` | $30.00 | $180.00 | – | – | – | 1M |
| OpenAI (snapshot 2026-04-23) | `gpt-5.5-pro-2026-04-23` | $30.00 | $180.00 | – | – | – | 1M |
| AIHubMix | `aihubmix/gpt-5.5-pro` | $30.00 | $180.00 | – | – | – | 1M |
| Azure OpenAI | `azure/gpt-5.5-pro` | $30.00 | $180.00 | $3.00 | – | – | 1M |
| Azure OpenAI (snapshot 2026-04-23) | `azure/gpt-5.5-pro-2026-04-23` | $30.00 | $180.00 | $3.00 | – | – | 1M |
| Databricks | `databricks/databricks-gpt-5-5-pro` | $30.00 | $180.00 | $30.00 | – | – | 922K |

## Cost examples

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

- OpenAI: $150.00
- Databricks: $150.00
- AIHubMix: $150.00
- Azure OpenAI: $150.00
- OpenAI batch: $75.00

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

- OpenAI: $336.00
- Databricks: $336.00
- AIHubMix: $336.00
- Azure OpenAI: $336.00

## Features

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

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="gpt-5.5-pro",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does GPT-5.5 Pro cost?

GPT-5.5 Pro costs $30.00 per 1M input tokens and $180.00 per 1M output tokens on OpenAI. Batch requests cost $15.00 per 1M input tokens and $90.00 per 1M output tokens. Above 272K input tokens, input costs $60.00 and output costs $270.00 per 1M tokens.

### What is the context window of GPT-5.5 Pro?

GPT-5.5 Pro has a 1,050,000-token context window and returns up to 128,000 tokens per response.

### Which providers offer GPT-5.5 Pro?

GPT-5.5 Pro is available from 4 providers through LiteLLM: OpenAI, AIHubMix, Azure OpenAI and Databricks. The lowest price is on Databricks.

### How do I call GPT-5.5 Pro with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="gpt-5.5-pro", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/responses from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does GPT-5.5 Pro support?

GPT-5.5 Pro supports function calling, parallel tool calls, image input, PDF input, reasoning, prompt caching and web search. It does not support structured output.

### When did LiteLLM add GPT-5.5 Pro?

GPT-5.5 Pro was added to LiteLLM's model price file in April 2026.

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