GPT-5.5 API Pricing & Cost Calculator

Q: Does GPT-5.5 support prompt caching?

Yes, OpenAI offers a 90% discount on cached input tokens, reducing the input price to $0.50 per million for matches.

GPT-5.5 represents the pinnacle of OpenAI's intelligence, delivering cutting-edge reasoning and tool-use capabilities. Understanding its cost structure is essential for running it at scale.

Input tokens

100,000

50% cached

Output tokens

5,000

per request

Volume

100 / monthly

Standard API

Cost Comparison

Based on 100,000 input tokens (50% cached), 5,000 output tokens, and 100 requests.

Gemini 3.5 Flash

$5.25

Claude Haiku 4.5

$8.00

Gemini 3.1 Pro (<=200k)

$17.00

GPT-5.4

$21.25

Claude Sonnet 4.6

$24.00

Claude Opus 4.7

$40.00

GPT-5.5

$42.50

Open full calculator to adjust tokens, caching, or add other models

How this is calculated

GPT-5.5 is priced at $5.00 per million input tokens and $30.00 per million output tokens, supporting a 90% caching discount ($0.50 per million) and a 50% batch discount ($2.50 per million inputs, $15.00 per million outputs).

Verdict

GPT-5.5 is a premium flagship model. Leverage its 90% prompt caching and 50% batch discounts to significantly lower operational costs in high-volume production environments.