How much does GPT-5.5 Pro cost?

GPT-5.5 Pro costs $30 per million input tokens and $180 per million output tokens on standard pricing. A workload of 20M input and 5M output tokens a month is about $1,500.

What is the context length of GPT-5.5 Pro?

GPT-5.5 Pro accepts up to 1,050,000 tokens (1.1M) of input and can return up to 128,000 tokens in one response.

Does GPT-5.5 Pro support tool calling and structured outputs?

Yes, GPT-5.5 Pro supports function/tool calling and structured (JSON) outputs. Supported tools: Function calling, Structured outputs, JSON mode, Reasoning, Deterministic seed.

What inputs and outputs does GPT-5.5 Pro support?

GPT-5.5 Pro accepts PDF, Image, Text as input and produces Text as output.

When was GPT-5.5 Pro released?

GPT-5.5 Pro was released by OpenAI in 2026-04-24.

GPT-5.5 Pro

gpt-5.5-pro

API Provider site

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for... Built by OpenAI.

Prices updated recently

Input price

$30

per 1M tokens · Standard

Output price

$180

per 1M tokens · Standard

Input limit

1.1M

tokens

Output limit

128K

tokens

Input formats

TextImageVideoAudioPDF

Output formats

TextImageVideoAudioPDF

Compare

GPT-5.5 Pro price history

2 price records since 9/25/2026

GPT-5.5 Pro cost calculator

Input20M tokens

Output5M tokens

$1,500/month

Standard pricing

Overview

What is GPT-5.5 Pro?

GPT-5.5 Pro is a text & reasoning and vision model from OpenAI. GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for... Its 1.1M context window and $30 input price make it a candidate for quality-focused production applications.

Image understandingDocument analysisContent workflowsClassification

Rates

GPT-5.5 Pro pricing

Pricing is based on token usage. Provider-specific caching, batch, regional, and tool charges may affect the final cost.

Input · Standard

$30

Per 1M tokens

Cached input · Standard

Not available

No listed cached-input rate

Capabilities

GPT-5.5 Pro Tools

Tools available when using GPT-5.5 Pro through supported provider APIs.

Function calling

Supported

Structured outputs

Supported

JSON mode

Supported

Reasoning

Supported

Built-in web search

Not supported

Log probabilities

Not supported

Deterministic seed

Supported

Parallel tool calls

Not supported

Prompt caching

Not supported

Strengths and limitations

Strengths

Priced at $30 input and $180 output per million tokens.
1.1M context supports large documents, repositories and extended conversations.
Supports text & reasoning and vision workloads in one model.

Limitations

Generated tokens cost 6× more than input tokens, which matters for verbose responses.
Large context capacity does not guarantee consistent retrieval across the entire prompt.
Arena Elo and MMLU-Pro are directional; test accuracy, latency and reliability on your own workload before committing.

Arena Elo, MMLU-Pro and pricing figures are illustrative; validate current vendor terms before purchase.

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