GPT-5.5 API Pricing

GPT-5.5 by OpenAI costs $5.00 per million input tokens and $30.00 per million output tokens.

Price verified from OpenAI's pricing page.

Rates and limits

Input / 1M
$5.00
Output / 1M
$30.00
Cached input / 1M
$0.50
Batch discount
50% off
Context window
1.05M tokens
Released
March 2026

Pricing note: Prompts over 272K input tokens are billed at $10 in / $1 cached / $45 out for the whole request.

What GPT-5.5 costs per month

Token volume split 3:1 between input and output, with no prompt caching.

Tokens per monthInput / outputStandardBatch API
1M750K / 250K$11.25$5.63
10M7.5M / 2.5M$112.50$56.25
100M75M / 25M$1,125.00$562.50
Estimate your own workload with GPT-5.5

Where to run GPT-5.5

Prices above are OpenAI's direct rates. Cloud platforms can charge differently; the cloud platform view compares them.

GPT-5.5 pricing FAQ

How much does GPT-5.5 cost per million tokens?

GPT-5.5 costs $5.00 per million input tokens and $30.00 per million output tokens, as listed on OpenAI's pricing page on September 30, 2026.

How much does GPT-5.5 cost for 10 million tokens a month?

About $112.50 a month, assuming 7.5 million input and 2.5 million output tokens with no prompt caching, or $56.25 through the batch API.

What is the context window of GPT-5.5?

GPT-5.5 accepts up to 1,050,000 tokens of context.

Does GPT-5.5 support prompt caching?

Yes. Cached input tokens cost $0.50 per million, 90% less than the standard input rate.

Is there a batch discount for GPT-5.5?

Yes. Requests sent through the batch API cost 50% less: $2.50 per million input tokens and $15.00 per million output tokens.

Where can I use the GPT-5.5 API?

GPT-5.5 is available through OpenAI API, Azure OpenAI Service, Azure AI Foundry, and OpenRouter.

Compare with other models

Prices shown as input / output per million tokens. All model prices · Side-by-side comparison