GPT-5.5 Pro
The high-compute variant of GPT-5.5 and successor to GPT-5.4 Pro, released April 2026, spending more reasoning per request on hard problems.
- Input
- $30.00 / 1M tokens
- Output
- $180.00 / 1M tokens
About $660.00 for 10M input and 2M output tokens. Estimate yours
1 provider
Key Specifications
- Context window
- 1M tokens
- Max output
- 128K tokens
- Knowledge cutoff
- Inputs
- Text, Image Outputs: Text
GPT-5.5 Pro pricing by provider
| Provider | Input / 1M tokens | Output / 1M tokens | Cost at 10M in + 2M out | |
|---|---|---|---|---|
|
OpenAI
Creator
|
$30.00 | $180.00 | $660.00 | View |
Heads up: We do our best to keep these specs & prices accurate. However, cloud costs may fluctuate based on region, usage, and other factors not listed here. These are estimates based on common setups and are for informational purposes only. Always verify current rates & exact specs with the provider before provisioning. LLM rates are base-tier, on-demand prices per 1M tokens; cached-input, batch and long-context tiers are not included.
Compare every model at this volume in the LLM cost calculator.
Capabilities
Function calling
Connect to external tools, APIs, and systems.
Structured output
Return responses in structured formats like JSON.
Web search
Search the web for up-to-date information.
Code execution
Write and execute code in a sandboxed environment.
File upload
Process uploaded documents, spreadsheets, and other files.
MCP
Connect to services via Model Context Protocol.
Image generation
Generate and edit images from text prompts.
More from OpenAI
| Model | Context | Input / 1M | Output / 1M |
|---|---|---|---|
|
GPT-5.4 Pro
|
1M | $30.00 | $180.00 |
|
GPT-4
|
8K | $30.00 | $60.00 |
|
GPT-5.2 Pro
|
400K | $21.00 | $168.00 |
|
o3-pro
|
200K | $20.00 | $80.00 |
|
GPT-5 Pro
|
400K | $15.00 | $120.00 |
|
o1
|
200K | $15.00 | $60.00 |
|
o3-deep-research
|
200K | $10.00 | $40.00 |
|
GPT-4 Turbo
|
128K | $10.00 | $30.00 |
Models near this price
The models nearest this one by input rate, five each way, at each one's cheapest listed provider.
Frequently Asked Questions
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 via OpenAI.
What does GPT-5.5 Pro cost for 10M input and 2M output tokens?
At OpenAI's rates, 10M input tokens and 2M output tokens cost about $660.00: $300.00 for input and $360.00 for output. Input is prompts and context, output is what the model writes back; a workload that generates more than it reads shifts the cost toward the output rate of $180.00 per 1M tokens.
Which providers offer GPT-5.5 Pro?
One provider lists GPT-5.5 Pro: OpenAI ($30.00 in / $180.00 out).
What is GPT-5.5 Pro's context window?
GPT-5.5 Pro accepts up to 1M tokens of input per request and returns up to 128K tokens per response. The context window is the prompt plus any documents, conversation history and tool results sent with it; every token in it is billed at the input rate.
What is GPT-5.5 Pro's knowledge cutoff?
GPT-5.5 Pro's knowledge cutoff is December 2025: its training data runs up to that month and it has no built-in knowledge of later events. It supports web search, which can supply newer information at query time.
What inputs and outputs does GPT-5.5 Pro support?
GPT-5.5 Pro accepts text and images as input and produces text. Its listed capabilities are function calling, structured output, web search, code execution, file upload, MCP and image generation.
How does GPT-5.5 Pro compare with GPT-5.4 Pro?
GPT-5.5 Pro and GPT-5.4 Pro both cost $30.00 per 1M input tokens ($180.00 vs $180.00 per 1M output tokens). Both have a 1M-token context window.
What are cheaper alternatives to GPT-5.5 Pro?
Models from other creators with a lower input rate and at least GPT-5.5 Pro's 1M-token context window: Llama 4 Scout at $0.17 per 1M input tokens (10M context). Rates are the cheapest listed provider for each; whether the quality holds for a given task is a separate question.
