LiteLLMModels

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.

By OpenAIModel ID gpt-5.5-proPrices updated Checked
Input
$30.00 / 1M tokens
Output
$180.00 / 1M tokens
Context window
1,050,000 tokens
Max output
128,000 tokens
Providers
4
Added to LiteLLM
April 2026

GPT-5.5 Pro pricing by provider

6 listings across 4 providers. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

ProviderModel name in LiteLLMInputOutputCache readCache writeBatch inBatch outContext
OpenAIgpt-5.5-pro$30.00$180.00––$15.00$90.001M
OpenAIsnapshot 2026-04-23gpt-5.5-pro-2026-04-23$30.00$180.00––$15.00$90.001M
AIHubMixaihubmix/gpt-5.5-pro$30.00$180.00––––1M
Azure OpenAIazure/gpt-5.5-pro$30.00$180.00$3.00–––1M
Azure OpenAIsnapshot 2026-04-23azure/gpt-5.5-pro-2026-04-23$30.00$180.00$3.00–––1M
Databricksdatabricks/databricks-gpt-5-5-pro$30.00$180.00$30.00$30.00––922K

Other GPT-5.5 Pro prices on OpenAI

Flex input$15.00 per 1M tokens
Flex output$90.00 per 1M tokens
Input above 272K tokens$60.00 per 1M tokens
Output above 272K tokens$270.00 per 1M tokens
Web search$10.00 per 1K searches

What GPT-5.5 Pro costs in practice

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

GPT-5.5 Pro features

Input: text, image. Output: text.

Use GPT-5.5 Pro with LiteLLM

Call GPT-5.5 Pro through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/responses. LiteLLM tracks the cost of every request at these prices.

Python SDK
from litellm import completion

response = completion(
    model="gpt-5.5-pro",
    messages=[{"role": "user", "content": "Hello!"}],
)
Proxy config.yaml
model_list:
  - model_name: gpt-5.5-pro
    litellm_params:
      model: gpt-5.5-pro
      api_key: os.environ/OPENAI_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-5.5-pro",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

GPT-5.5 Pro 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.

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: OpenAI, AIHubMix, Azure OpenAI, Databricks.

Provider pages: OpenAI, AIHubMix, Azure OpenAI, Databricks.