gpt-5.5

OpenAIgpt-5.5

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling large-scale reasoning, coding, and multimodal workflows within a single system.

API Pricing

Price typeBilling expression
Official price
Base pricingPricing tier: base
  • Input usage × $5.00
  • Output usage × $30.00
  • Cached read × $0.50
GPT_Pro×0.660% of official list price
Base pricingPricing tier: base
  • Input usage × $3.00
  • Output usage × $18.00
  • Cached read × $0.30

Group multiplier: x0.6

GPT_Ultra×0.880% of official list price
Base pricingPricing tier: base
  • Input usage × $4.00
  • Output usage × $24.00
  • Cached read × $0.40

Group multiplier: x0.8

Official pricing is subject to the model provider's latest published pricing and may vary by request method or service region. GPT_Pro, GPT_Ultra — TokenByte channel pricing. Actual prices and availability reflect current platform data.

Model information

Model providerOpenAI
Model IDgpt-5.5
Context window1050000
InputTextImage
OutputText

Frequently asked questions

01

What is GPT-5.5?

GPT-5.5 is OpenAI's frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling large-scale reasoning, coding, and multimodal workflows within a single system.
02

How much does GPT-5.5 cost?

GPT-5.5 costs $5.00/M input tokens and $30.00/M output tokens, with separate rates for Cache Read at $0.50/M tokens and Web Search at $10.00/1K calls.
03

What is the context length of GPT-5.5?

GPT-5.5 has a 1,050,000 token context window. It supports up to 128,000 completion tokens.
04

Does GPT-5.5 support tool calling and structured outputs?

Yes. GPT-5.5 accepts `tools` and `tool_choice` for function calling. It also supports structured outputs via a JSON schema in `response_format`.
05

What inputs and outputs does GPT-5.5 support?

GPT-5.5 accepts files such as PDFs, images, and text as input and returns text.