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🧠 ReasoningEnterprise

GPT-5.5 Pro

by OpenAI

Higher-compute GPT-5.5 variant for tougher problems requiring smarter, more precise responses.

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Input Price

$30

per 1M tokens

Output Price

$180

per 1M tokens

Context Window

1,050K

tokens (128K max output)

Specifications

Release Date2026-04-24
Category🧠 Reasoning
Context Window1,050,000 tokens
Max Output128,000 tokens
ProviderOpenAI
Input Cost$30 / 1M tokens
Output Cost$180 / 1M tokens
Price TierEnterprise

Capabilities

textvisioncodereasoning

Related Use Cases

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Calculate the API cost of running a customer support or conversational AI chatbot.

~2,000 in · ~500 out
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Calculate how much it costs to summarize documents, reports, and articles with AI.

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Calculate the cost of analyzing images with AI vision models.

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Monthly Cost Estimates

Usage LevelDaily TokensDailyMonthlyYearly
Light~50 requests/day100K in / 20K out$6.60$198.00$2409
Medium~200 requests/day500K in / 100K out$33.00$990.00$12045
Heavy~1K requests/day2,000K in / 500K out$150.00$4500.00$54750
Enterprise~5K requests/day10,000K in / 2,000K out$660.00$19800.00$240900

Cost Calculator

Alternatives to GPT-5.5 Pro

💰 Cheaper Options

GPT-5.2 proOpenAI
10% cheaper
$21/M in · $168/M out
GPT-5 ProOpenAI
36% cheaper
$15/M in · $120/M out
o3-proOpenAI
52% cheaper
$20/M in · $80/M out
Claude 3 OpusAnthropic
57% cheaper
$15/M in · $75/M out

🚀 More Powerful

o1 ProOpenAI
257% more
$150/M in · $600/M out

Frequently Asked Questions

How much does GPT-5.5 Pro API cost per million tokens?▼
GPT-5.5 Pro costs $30 per million input tokens and $180 per million output tokens as of 2026. These are the standard API rates from OpenAI.
What is the GPT-5.5 Pro context window?▼
GPT-5.5 Pro supports a 1.05M context window (1,050,000 tokens), which means you can process up to 1.05M tokens in a single API call.
How much does GPT-5.5 Pro cost per month?▼
At medium usage (~200 requests/day with 500K input and 100K output tokens/day), GPT-5.5 Pro costs approximately $990.00/month. Light usage runs about $198.00/month, and heavy usage (~1K requests/day) around $4500.00/month.
Is there a cheaper alternative to GPT-5.5 Pro?▼
Yes — GPT-5.2 pro by OpenAI is a cheaper option at $21/M input tokens vs $30/M for GPT-5.5 Pro. Other budget alternatives include models in the efficient tier.
Is GPT-5.5 Pro good for ai agent / agentic workflows?▼
GPT-5.5 Pro is a reasoning model with support for text, vision, code. For ai agent / agentic workflows, it offers 1.05M context and costs $30/M input tokens — a premium option for this use case.

GPT-5.5 Pro Comparisons

codex mini latest vs gpt 5 5 progpt 5 5 pro vs o4 mini deep researchgpt 5 5 pro vs o3 deep researchgpt 5 2 vs gpt 5 5 progpt 5 2 pro vs gpt 5 5 progpt 5 5 vs gpt 5 5 progpt 5 5 instant vs gpt 5 5 progpt 5 4 pro vs gpt 5 5 pro

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